Re: Expanding disk space.
Mark: Sorry for the delay. I sent this Sunday. Today I find out my posts to LINUX-390 haven't been going thru because I haven't subscribed. So I think my DROID has a different email address (outgoing), however I get all my emails that I use to get. So, now I'm off subscribing to all the listservs thru my Droid. Anyway, following is a repost of my comment: Tom Duerbusch THD Consulting What I gathered from the original post was not being able to apply maintenance due to being out of disk space. Well if the failure is caused by memory/swap filling up, increase virtual memory instead of adding a real 3390 to swap for temporary problems. I run many small, very small Linux guests that I do have to increase virtual storage when I apply maintenance. The smallest zLinux machine I ever got real work out of was a 24 MB machine using IUCV for IP connectivity to VM's TCPIP machine. It was just a router. Currently, my smallest machines are 48 MB (ftp servers), and you just can't apply maintenance anymore (yast with connection to a vswitch) in a 48 MB machine . Memory is cheap, until you have to buy it. Tom Duerbusch THD Consulting Sent from my Verizon Wireless 4G LTE DROID Mark Post wrote: >>> On 8/16/2013 at 11:40 AM, "Duerbusch, Tom" >>> wrote: > I have also occasionally had that kind of problem. > > I'm under VM, so I IPL the guest and specify another 512 MB of virtual > storage. > Run my maintenance. > Then reipl with the normal amount of memory for that guest. Just curious as to what this has to do with adding disk space? Mark Post -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/ >>> On 8/16/2013 at 11:40 AM, "Duerbusch, Tom" >>> wrote: > I have also occasionally had that kind of problem. > > I'm under VM, so I IPL the guest and specify another 512 MB of virtual > storage. > Run my maintenance. > Then reipl with the normal amount of memory for that guest. Just curious as to what this has to do with adding disk space? Mark Post -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/ -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/
Re: DB2 Connect client, any sense in running server?
We converted from standalone client copies to DB2 Connect Server under zLinux. Reasons: 1. Cost. The standlone copy was about $450 per. The server copy for 25 Named user was around $2,250. A Named user is per user and cannot be shared. A 25 pack for concurrent users costs much more. Another varient is a cost per engine based on your application server or web server size. Then there is the enterprize wide license. 2. I have multiple DB2 Connect servers running. One is production which has been up for more then 2 years. A fall back server in case the production server crashes (just change what you connect to). And a test one and MY test one. 3. If I add another DB2 (VSE), I just need to add it to DB2 Connect Server. Many PC based product will then see the new server when you open the connection. 4. The "thin client" on the pc is much smaller in disk space and PC memory usage. 5. Putting it, or really "them" on zLinux, is what zLinux is all about. Server Consolidation. Takes about 1-2% CPU. However, you have already paid for your current copies. We went with the server method and redistribute the standalone copies to certain users that we couldn't talk into the server method. Tom Duerbusch THD Consulting Sent via BlackBerry by AT&T -Original Message- From: Tom Ambros Sender: Linux on 390 Port Date: Thu, 21 Jun 2012 10:43:16 To: Reply-To: Linux on 390 Port Subject: DB2 Connect client, any sense in running server? We're running the DB2 Connect client at the various distributed machines that require it. Is there any sense in running the DB2 Connect server product in a Linux on System Z guest to serve the other guests or the distributed machines removing the client from those distributed devices? I am of the impression that the only purpose for the server, at this point, is to perform two-factor commit under certain circumstances that we do not encounter here. Do the advantages of running the client wash out when Linux on System Z for a set of guests becomes the configuration? Thank you for sharing your experience and advice. Thomas Ambros Operating Systems and Connectivity Engineering 518-436-6433 This communication may contain privileged and/or confidential information. It is intended solely for the use of the addressee. If you are not the intended recipient, you are strictly prohibited from disclosing, copying, distributing or using any of this information. If you received this communication in error, please contact the sender immediately and destroy the material in its entirety, whether electronic or hard copy. This communication may contain nonpublic personal information about consumers subject to the restrictions of the Gramm-Leach-Bliley Act. You may not directly or indirectly reuse or redisclose such information for any purpose other than to provide the services for which you are receiving the information. 127 Public Square, Cleveland, OH 44114 If you prefer not to receive future e-mail offers for products or services from Key send an e-mail to mailto:dnereque...@key.com with 'No Promotional E-mails' in the SUBJECT line. -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/
Re: Cannot add drive to existing LVM SLES 11 SP 1
Well, I found my problem. The yast panels are quite a bit different than in previous versions and it was not intutive on what to do. Anyway: Partitioner: Volume Management Tab to /dev/LVM and hit enter. You now have the Logical Volumes display with a resize option. Don't do it. Tab backward to Overview and Resize there. That is where you get the ability to add/remove volumes from the LVM pool. On prior versions, there was a LVM option under System, that took you right to the panel where you can, optionally, add/remove volumes. Just have to know the secret handshake and all is well . Thanks for everyones help. Tom Duerbusch THD Consulting >>> Marcy Cortes 3/14/2012 3:54 PM >>> You shouldn't have unount to resize. We increase all the time with both 10 and 11. The command is different between the 2 though. Marcy. Sent from my BlackBerry. - Original Message - From: Scott Rohling [mailto:scott.rohl...@gmail.com] Sent: Wednesday, March 14, 2012 03:43 PM To: LINUX-390@VM.MARIST.EDU Subject: Re: [LINUX-390] Cannot add drive to existing LVM SLES 11 SP 1 just realized that the lvextend command I showed should be: lvextend -L +2G /dev/testvg/testlv And - if the error is about resize - then it's likely because the filesystem is mounted and you will need to unmount it. If yast got that far, I'm not sure what the state of your volume group is - so you may want to do a vgdisplay -v to see if the device did get added to the vg.. Scott rohling On Wed, Mar 14, 2012 at 11:42 AM, Scott Rohling wrote: > It's not too difficult to do this on the command line: > > lsdasd and figure out what the /dev/dasd device is - let's say it's dasdx > > format it: dasdfmt -b 4096 /dev/dasdx > partition it: fdasd -a /dev/dasdx (make one partition using whole > deice) > lvm format: pvcreate /dev/dasdx1 > add to volume group:vgextend vg-name /dev/dasdx1 (where vg-name is > the volume group name you're extending) > > You can then issue appropriate lvextend command to add space to the > logical volume.. for example - add 2G to to testlv in testvg: > > lvextend +L 2G /dev/testvg/testlv > > Then issue appropriate resize commands for whatever filesystem.. > > Hope that helps - not sure about SLES or Yast system tools for this - I > always use command line. > > Scott Rohling > > > On Wed, Mar 14, 2012 at 11:28 AM, Tom Duerbusch < > duerbus...@stlouiscity.com> wrote: > >> I have an existing LVM that is near out of space. >> I created it with the defaults that came with SLES 11 SP 1. >> >> Now I need to add a drive to the LVM pool. But there doesn't seem to be >> an option to add a volume to the pool. >> >> I have done the same thing with SLES 8, 9 and 10, so it is not like I >> don't have an understanding of what is needed. >> >> So, I'm wondering if SLES 11 SP 1 just didn't include that option by >> mistake, or if the defaults changed to making striping, or something else >> that prevents just adding a disk to the pool, that I didn't pay attention >> to. >> >> I'm now on the tangent of bringing up a test SLES 11 SP 1 system that I >> can crash and/or destroy while playing around on adding a pack to an >> existing LVM. But just in case it is something simple, it is better to ask >> the collective, before I spend the hours on researching the problem. >> >> Thanks >> >> Tom Duerbusch >> THD Consulting >> >> -- >> For LINUX-390 subscribe / signoff / archive access instructions, >> send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or >> visit >> http://www.marist.edu/htbin/wlvindex?LINUX-390 >> -- >> For more information on Linux on System z, visit >> http://wiki.linuxvm.org/ >> > > -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/ -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wi
Re: Cannot add drive to existing LVM SLES 11 SP 1
It doesn't look stripped to me. I might go with Scotts suggestion and use the command line format. Then I can see if it is a LVM problem, or a yast problem. (now that I have a test system) Tom Duerbusch THD Consulting linux74:/ # pvscan PV /dev/dasdc1 VG LVM1 lvm2 [6.88 GB / 0free] PV /dev/dasdb1 VG LVM1 lvm2 [6.88 GB / 0free] Total: 2 [13.75 GB] / in use: 2 [13.75 GB] / in no VG: 0 [0 ] linux74:/ # lvdisplay -m LVM1 --- Logical volume --- LV Name/dev/LVM1/LVM VG NameLVM1 LV UUIDgxnyIf-2xuo-ctvS-uYka-tN8T-UxJA-G23zHZ LV Write Accessread/write LV Status available # open 1 LV Size13.75 GB Current LE 3520 Segments 2 Allocation inherit Read ahead sectors auto - currently set to 1024 Block device 253:0 --- Segments --- Logical extent 0 to 1759: Typelinear Physical volume /dev/dasdc1 Physical extents0 to 1759 Logical extent 1760 to 3519: Typelinear Physical volume /dev/dasdb1 Physical extents0 to 1759 linux74:/ # >>> "Ayer, Paul W" 3/14/2012 3:04 PM >>> > To see how the current lvm is configured I like to use the command: > lvdisplay -m lv_name > This will tell you what disks it's on, and what parts of the disks, and/or if > it's stripped or not .. > Most likely not stripped, but if it is then you will need to add the same > number of disks and disk size that are already there .. = lvdisplay -m /dev/abcvg/abcvol --- Logical volume --- LV Name/dev/abcvg/abcvol VG Nameabcvg LV UUIDuAZIek-FTUL-6Hgb-ABrw-D6wH-h8zg-mjPxbr LV Write Accessread/write LV Status available # open 1 LV Size5.97 GB Current LE 191 Segments 3 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 253:1 --- Segments --- Logical extent 0 to 72: Typelinear Physical volume /dev/dasdm1 Physical extents0 to 72 Logical extent 73 to 145: Typelinear Physical volume /dev/dasdn1 Physical extents0 to 72 Logical extent 146 to 190: Typelinear Physical volume /dev/dasdo1 Physical extents0 to 44 === lvdisplay -m /dev/xyzvg/xyzlv --- Logical volume --- LV Name/dev/dgsa09vg/stripe_o05gsa1startlv VG Namexyzvg LV UUIDBWxYeH-927r-07jJ-E3zV-5FAc-Bofc-fB0S0o LV Write Accessread/write LV Status available # open 1 LV Size50.02 GB Current LE 12804 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 24832 Block device 253:14 --- Segments --- Logical extent 0 to 12803: Typestriped Stripes 97 Stripe size 64 KB Stripe 0: Physical volume /dev/dasdab1 Physical extents 1479 to 1610 Stripe 1: Physical volume /dev/dasdac1 Physical extents 1479 to 1610 Stripe 2: Physical volume /dev/dasdad1 Physical extents 1479 to 1610 Stripe 3: Physical volume /dev/dasdae1 Physical extents 1479 to 1610 Goes on this way for 97 disks Paul 617-985-8671 Confidentiality Notice: The information contained in this email is intended for the confidential use of the above-named recipient(s). If the reader of this message is not the intended recipient or person responsible for delivering it to the intended recipient, you are hereby notified that you have received this communication in error, and that any review, dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this in error, please notify the sender immediately and destroy this message. Data Classification: Limited Access -Original Message- From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of Scott Rohling Sent: Wednesday, March 14, 2012 2:42 PM To: LINUX-390@VM.MARIST.EDU Subject: Re: Cannot add drive to existing LVM SLES 11 SP 1 It's not too difficult to do this on the command line: lsdasd and figure out what the /dev/dasd device is - let's say it's dasdx format it: dasdfmt -b 4096 /dev/dasdx partition it: fdasd -a /dev/dasdx (make one partition using whole deice) lvm format: pvcreate /dev/dasdx1 add to volume group:vgextend vg-name /dev/dasdx1 (where vg-name is the volume grou
Re: Cannot add drive to existing LVM SLES 11 SP 1
Well, that didn't do it, but it did give me an indication on what it wants. When I try to resize, I get: You cannot resize the selected partition because the file system on this partition does not support resizing. The partitions were originally created with EXT3. That shouldn't be a problem. The default in SLES 11 did change from Reiser to EXT3, but I have always used EXT3 as my standard on all the prior versions. On a newly created test system, I can create a LVM using multiple drives, but I cannot add any drives to the LVM. I can, however, create another LVM and add additional drives there, but that is different then expanding an existing LVM. Right now, I'm on SLES 11 SP 1 without any additional maintenance. There are only 7 patches for LVM on this service pack. There seems like a hundreds of patches against yast. Now I'm looking at patches that may address the failure to be able to add drives to an existing LVM. Thanks Tom Duerbusch THD Consulting >>> Mark Workman 3/14/2012 1:48 PM >>> If you are using YAST: Partitioner -> Volume Management -> double click volume group you want to expand -> on the 'Overview' tab select 'Resize' then select the disk you want add to the group. Mark Workman Shelter Insurance Companies 573.214.4672 mwork...@shelterinsurance.com From: Tom Duerbusch To: LINUX-390@VM.MARIST.EDU Date: 03/14/2012 01:34 PM Subject:Cannot add drive to existing LVM SLES 11 SP 1 Sent by:Linux on 390 Port I have an existing LVM that is near out of space. I created it with the defaults that came with SLES 11 SP 1. Now I need to add a drive to the LVM pool. But there doesn't seem to be an option to add a volume to the pool. I have done the same thing with SLES 8, 9 and 10, so it is not like I don't have an understanding of what is needed. So, I'm wondering if SLES 11 SP 1 just didn't include that option by mistake, or if the defaults changed to making striping, or something else that prevents just adding a disk to the pool, that I didn't pay attention to. I'm now on the tangent of bringing up a test SLES 11 SP 1 system that I can crash and/or destroy while playing around on adding a pack to an existing LVM. But just in case it is something simple, it is better to ask the collective, before I spend the hours on researching the problem. Thanks Tom Duerbusch THD Consulting -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/ This e-mail is intended only for its addressee and may contain information that is privileged, confidential, or otherwise protected from disclosure. If you have received this communication in error, please notify us immediately by e-mailing postmas...@shelterinsurance.com; then delete the original message. -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/ -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/
Cannot add drive to existing LVM SLES 11 SP 1
I have an existing LVM that is near out of space. I created it with the defaults that came with SLES 11 SP 1. Now I need to add a drive to the LVM pool. But there doesn't seem to be an option to add a volume to the pool. I have done the same thing with SLES 8, 9 and 10, so it is not like I don't have an understanding of what is needed. So, I'm wondering if SLES 11 SP 1 just didn't include that option by mistake, or if the defaults changed to making striping, or something else that prevents just adding a disk to the pool, that I didn't pay attention to. I'm now on the tangent of bringing up a test SLES 11 SP 1 system that I can crash and/or destroy while playing around on adding a pack to an existing LVM. But just in case it is something simple, it is better to ask the collective, before I spend the hours on researching the problem. Thanks Tom Duerbusch THD Consulting -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/
Re: Oracle in virtual environments
All the Oracle performance documentation are based on cheap CPU, cheap memory, expensive I/O. Mainframe are cheap I/O, expensive CPU (relatively), expensive memory (relatively). I run some small production Oracle systems (10g) in 600 MB with one at 750 MB. I use OEM (Oracle Enterprise Manger) to see if there are getting good service time. I conserve memory, in order to have more machines running. Yes, I force more I/O, but the Ficon attached DS6800 sure seems to be handling it. CPU is running 45 to 50%. Sure, out of the 45 Linux guests, more are relatively idle. Two Oracle production machine. Two Oracle test machines (same table structure as production). Two Oracle development machines (where table structures may be different). One Oracle DBA machine (for me to test with). Bunch of Samba servers (production and test). Bunch of FTP servers (production and test). One DB2 Connect production server. One DB2 Connect test server. Few NFS servers (production and test). So my Oracle machines are not barn burners. They get the job done and everyone is happy. OEM shows we spike around 10,000 I/Os per second being serviced thru the SGA. The Linux guest isn't swapping and VM isn't paging. You don't need 4G for Oracle, but if I was on a platform where it was hard to add memory, I would also start at 4 GB. But for a VM user, start low, and adjust the VM Guest size and the SGA to suit what you need. Tom Duerbusch THD Consulting >>> Mauro Souza 2/23/2012 3:54 PM >>> My personal experience: I had a client using Oracle on Intel (a 16GB RAM, multicore Dell server), and they had a couple queries they had to run every day, at the end of the day. The job was taking 29 minutes. They exported the database, imported on a Linux on Z, same 16GB, same number of virtual processors, ran the same queries. Result? 31 minutes. They asked why the mighty mainframe was losing for an Intel box, and mainframe had a lot of resources, that kind of talk. So we sit on the console and began changing things. We put only 3GB of memory on the Oracle database. Changed the IO to direct-io, async-io. I don't remember exactly now, but I think we configured like 20 io slaves, and put the query to run. The DBA said we were insanely crazy, taking off memory from a database server, and disabling cache. 9 minutes after, the query was over. He said that the query failed, 9 minutes was too fast. And run again. And got 9 minutes, and everything was all right. And we asked what kind of sorcery was that... So don't be shy: take off memory from the database. Let something close to 1GB to be free to Linux, and the rest can go to SGA/PGA. zVM already have cache. The control unit have cache. The physical disk have cache. Linux don't need more caching. Measure status (use the table statistics, get the data from Oracle enterprise manager), change memory, IO, Oracle parameters, and check the performance data again. Mauro http://mauro.limeiratem.com - registered Linux User: 294521 Scripture is both history, and a love letter from God. On Thu, Feb 23, 2012 at 12:45 PM, van Sleeuwen, Berry < berry.vansleeu...@atos.net> wrote: > > -Original Message- > > From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of > > Damian Gallagher > > > > I have worked on numerous migration projects, where we have taken the > > Win/*nix system with hundreds of GB of SGA, and run it on Linux on IBM > > zSeries with much less memory - my usual recommendation is to reduce by > > 90% to start with, and we generally get there or better - in common with > > this thread it takes a while to convince the DBAs :-). I have the > numbers, > > AWR, throughput etc from a specific project in front of me, so this is > no idle > > statement. Add hugepages to the mix, and it just gets better. > > > > The question would also be how to convince them if even Oracle itself > provides questionable or just wrong recommendations. > > The Installation script demands 4G memory, while it can be installed > within 1.2G. It demands 1G+ /tmp space, eventhough it only uses 120M. > > The machine needs at least 1G per database, preferably more, according to > the recommendations. We have proven this to be wrong in a system with 2 > databases within 1G. And it still performs very well. > > One of our production databases had a 'bad' performance and the Oracle > tools recommend sizing the SGA to 10G (instead of 3.5G). And time and time > again we prove the problem to be a bad userprogram or bad data. > > Even redbooks do not do better in this respect, for any product for that > matter. They tend to present a "this is how we did it" instead of these are > the requirements. Often they disregard other requirements such as multiple > customer networks, security ru
Re: bogomips
In back of my mind, I keep on thinking: Both UNIX (BSD) and LSD came out of University of California, Berkeley. Coincidence? Perhaps the person that came up with BOGOMIPS was having a bad trip? Tom Duerbusch THD Consulting >>> Michael MacIsaac 2/22/2012 12:23 PM >>> > What was BOGOMIPS ever used for? Recurrent discussions about their uselessness? :)) "Mike MacIsaac"(845) 433-7061 -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/ -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/
Re: bogomips
Leads to another tangent What was BOGOMIPS ever used for? I could see, back on slower Intel processors (486), you might need it to calculate the amount of times you have to spin a processor to product a delay of xx milliseconds. Is there any, near modern, software that uses it now? Whether on 390 processors or other platforms? Tom Duerbusch THD Consulting >>> Alan Altmark 2/21/2012 2:52 PM >>> On Tuesday, 02/21/2012 at 03:27 EST, William Carroll wrote: > Isn't a BOGOMIP just a calculated loop value (ie how many times through > the loop) used to do some internal timing. > at best it give a course indicator that one processor is faster but I > would say relative to the same architecture as one may favor the loop > better than others. > so not all BOGOMIPs are not equal. It doesn't really matter precisely what a BOGOMIP is, except to say that it's a measure of the apparent speed of the instruction mix used to calculate the number at the moment it was calculated. Outside of a lab, you can't even compare two consecutive bogomips calculations. Beyond that, it has no meaning except to generate discussion about how meaningless it is. :-) Alan Altmark Senior Managing z/VM and Linux Consultant IBM System Lab Services and Training ibm.com/systems/services/labservices office: 607.429.3323 mobile; 607.321.7556 alan_altm...@us.ibm.com IBM Endicott -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/ -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/
Re: Question about zVM and MF configuration
In my experience, it is Linux that interferes with zVSE , but that is only in a scarce memory configuration. Consider that zVSE workloads really don't change the amount of memory needed, month to month. However, add a Websphere Linux image (take any "large to you" linux application), and add it to an VM system that is actively using most of its memory, and you page. You page everyone else out. oops. Did I do a SET RESERVE on my production guests? No? Did I have plenty of paging devices available for this new spike? No? What is the largest partition in VSE that will feel the effect of being paged out? CICS/TS Users are unhappy, until the system settles down in 5-10 minutes. Other reasons for running a system under LPAR instead of zVM: 1. Needs more resources then zVM can supply (i.e. more than 256 GB real storage) 2. Needs hardware that zVM can't manage (sysplex timer, for example). 3. If a guest is running 90%+ cpu, you might want to move it out from under zVM and dedicate processors to it. If you are not having any problems with performance, than running under a single LPAR for most things, is great. You might want to have a small LPAR for testing (VM installs, Operator training etc) or to provide Live Guest Relocation of your near 24X7 Linux images for when you apply maintenance or have any other scheduled outage of your primary zVM system. Tom Duerbusch THD Consulting >>> Michael Simms 1/4/2012 3:50 PM >>> I hope everyone had a safe and happy one Holiday Season. I need some guidance, advice and/or ammunition on an issue that has come up regarding mainframe configuration. I have found myself having to defend the way we are now configured vs. a co-worker who has come back from class saying his instructor said we should run 2 LPARs, one with zVM and zVSE and the other one house our production zLinux and DB2 images. My co-worker has no mainframe experience and does not know our hardware or complete software configuration. Apparently my co-worker fears VSE ‘interference’ with his zLinux images as well as a fear that he would crash the zVM system. Not sure what he has in his plans that would cause such zVM instability. We currently have: z114, 1 partial CP, 1 IFL, 24GB storage (18/6), 2 FICON cards, 2 OSA cards, 1 zVM LPAR with both CPUs, zVM V6.1, zVSE, zLinux of various flavors SuSE running and DB2 running in several or more zLinuxes. Don’t know how many DB2 zLinux images yet. We already have a couple of production zLinux and are exploring another set of zLinux that would maybe use the zVSE VSAM Redirector and DB2. I suggest that we add to our current configuration as it would better share resources such as memory and I/O. I also feel that it would be easier to manage 1 LPAR instead of 2 LPARs and all their various pieces and parts that would also include zVM test machines and 2 test VSE machines. I have tried to explain how mainframe architecture and zVM have been designed as a sharing environment while at the same time protecting against influences from any given guest machine, should the configuration be configured just right. I might have partially agreed with his instructor had not zVM come to support all manner of CPU in recent years, for example accommodating both CP and IFLs. We are also on a limited budget and I don’t know if we’d be able to purchase more storage or Chpids. Based on my years experience, I have poked, prodded and received advice for our system to where we have great performance today, both traditional and non-traditional workloads. Does anyone have suggestion/points to argue one way or the other? Do you have some examples of something similar, one way or another, to what we have or will soon have? You probably would like some more input variables? Just let me know and I’ll provide. I appreciate any and all feedback! Thanks. -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/ -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/
Re: Undeleting files
Thanks for the options. I ended up using extundelete. First flashcopy the 3390-3 that this directory was on. Never take a chance on making things worse. Backup first. The files lost were VSE Virtual Tape files. I could mount the real 3420 volumes again and copy them to virtual tape, so that was my fall back solution. When I undeleted the files to an empty 3390-3, it filled up the volume. So I ended up allocating a 3390-9 to hold the undeleted files. (used 35% of the mod 9) extundelete came up with over 300 files. Most of them failed in the undelete process. This seemed to be from older files that existed that were deleted and the space reused, most likely by my virtual tapes. The process didn't produce any filenames. Everything was recreated as "file.xxx" where xxx is a number, perhaps a directory block id or something. So I ended up running each file thru tapemap to see what was on it. Also, the tape hdr label would tell me the volser which is what I used as a filename. Long process. Took about 4 hours to recover 59 tape files and map them which also validated there was a trailing tapemark. I had an existing "dir" list of the directory I accidently deleted. So I knew what files should be there and their filesize. Only 1 file was not recoverable. I think that was pretty good. Good work for a Friday.. Tom Duerbusch THD Consulting >>> Rafael Godinez Perez 12/15/2011 4:05 AM >>> El 14/12/11 23:00, Tom Duerbusch escribió: > Where I know the answer to this question, generally. I wonder if this can be done in a very defined sitituation. > > I have disk "/dev/dasdb1", formatted with ext3. > There is one directory on it. > That directory had about 40 files on it of a few megabytes each. > This is SLES 10 SP 2. > > I connected to the Linux image with WINSCP. > I bought up that directory in one pane and in the other pane, I bought up my thumb drive. > I wanted to copy the files to my thumb drive. > > Instead of copying the files, I thought syncing the directories would be easier. > Well, I synced an empty directory to the Linux directory. All files are gone. > > In most cases, recovering deleted files is very dependant on if any of the space or directory structure has been reused. In this case, the space hasn't been reused, but I don't know if the deletion of 40 files, one at a time, would reuse the directory blocks or just mark them available. > > Before I go too far in this.... > Am I just out of luck? > Or is there a decent chance I can recover these files? > > Thanks > > Tom Duerbusch > THD Consulting > > -- > For LINUX-390 subscribe / signoff / archive access instructions, > send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit > http://www.marist.edu/htbin/wlvindex?LINUX-390 > -- > For more information on Linux on System z, visit > http://wiki.linuxvm.org/ You may want to try this tool. It worked for me many times. http://www.cgsecurity.org/wiki/PhotoRec_Step_By_Step HTH, Rafa. -- Rafael Godínez Pérez Red Hat - Senior Solution Architect EMEA RHCE, RHCVA, RHCDS Tel: +34 91 414 8800 - Ext. 68815 Mo: +34 600 418 002 Dirección Comercial: C/Jose Bardasano Baos, 9, Edif. Gorbea 3, Planta 3ºD, 28016 Madrid, Spain Dirección Registrada: Red Hat S.L., C/ Velazquez 63, Madrid 28001, Spain Inscrita en el Reg. Mercantil de Madrid – C.I.F. B82657941 -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/ -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/
Undeleting files
Where I know the answer to this question, generally. I wonder if this can be done in a very defined sitituation. I have disk "/dev/dasdb1", formatted with ext3. There is one directory on it. That directory had about 40 files on it of a few megabytes each. This is SLES 10 SP 2. I connected to the Linux image with WINSCP. I bought up that directory in one pane and in the other pane, I bought up my thumb drive. I wanted to copy the files to my thumb drive. Instead of copying the files, I thought syncing the directories would be easier. Well, I synced an empty directory to the Linux directory. All files are gone. In most cases, recovering deleted files is very dependant on if any of the space or directory structure has been reused. In this case, the space hasn't been reused, but I don't know if the deletion of 40 files, one at a time, would reuse the directory blocks or just mark them available. Before I go too far in this Am I just out of luck? Or is there a decent chance I can recover these files? Thanks Tom Duerbusch THD Consulting -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/
Re: FICON-Attached 3590 Tape Drives Not Detected
When I use 3590 tapes here, this is what I do: vary on 5b1 (vary it off first on the other lpar) attach 5b1 LINUX72 >From Linux: lstape chccwdev -e 0.0.05b1 (set drive online) lstape mtst -f /dev/ntibm0 rewind mtst -f /dev/ntibm0 fsf 1 mtst -f /dev/ntibm0 compression 1 However, you have to install the mtst tar file (part of the IBM code) to use the mtst command. Without mtst, I don't believe that you can turn on/off compression on your drives. Tom Duerbusch THD Consulting >>> Edward Jaffe 11/5/2011 4:50 PM >>> Hello, I have RHEL 6 Linux running as a guest under z/VM 6.1 on our z10 BC. It has the following 3590-H tape drives assigned in the z/VM directory: DEDICATE 1500 1500 MULTIUSER DEDICATE 1501 1501 MULTIUSER DEDICATE 1502 1502 MULTIUSER DEDICATE 1503 1503 MULTIUSER A query command shows the drives are attached to the Linux guest: q 1500-1503 TAPE 1500 ATTACHED TO ZLINUX1 1500 R/W NOASSIGN MULTIUSER TAPE 1501 ATTACHED TO ZLINUX1 1501 R/W NOASSIGN MULTIUSER TAPE 1502 ATTACHED TO ZLINUX1 1502 R/W NOASSIGN MULTIUSER TAPE 1503 ATTACHED TO ZLINUX1 1503 R/W NOASSIGN MULTIUSER However, the lstape command shows no drives: FICON/ESCON tapes (found 0): TapeNo BusID CuType/Model DevType/Model BlkSize State Op MedState SCSI tape devices (found 0): Generic DeviceTarget Vendor ModelType State I found the driver here: /lib/modules/2.6.32-131.17.1.el6.s390x/kernel/drivers/s390/char/tape_3590.ko What am I missing? How can I get Linux to recognize these tape drives? -- Edward E Jaffe Phoenix Software International, Inc 831 Parkview Drive North El Segundo, CA 90245 310-338-0400 x318 edja...@phoenixsoftware.com http://www.phoenixsoftware.com/ -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/ -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/
Re: Window question
dir z: /s Tom Duerbusch THD Consulting >>> Eddie Chen 9/26/2011 3:56 PM >>> Does any know the command in WINDOW where I can list every files/directories Under my Z drive. Similar to the Linux command of "ls -lR" where I can list all the files/directory under the file system. Thanks -Original Message- From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of Mark Post Sent: Monday, September 26, 2011 3:37 PM To: LINUX-390@VM.MARIST.EDU Subject: Re: RH NFS Server >>> On 9/26/2011 at 03:04 PM, "Dazzo, Matt" wrote: > I finally got some messages to the /var/log/messages file. What might these > means? Thanks Matt > > Sep 26 14:54:35 lntest1 mountd[1264]: authenticated mount request from > 27.1.39.74:1023 for /home/matt (/home/matt) > Sep 26 14:54:35 lntest1 kernel: nfsd: request from insecure port > (27.1.39.74:1062)! > [root@lntest1 log]# It means that the z/OS client initiated the mount request on outgoing port 1062. Since only root can open ports between 0-1023, those are called 'secure ports" and anything else is referred to as "unprivileged" or "insecure" ports. Some NFS server implementations don't like mount requests coming in on unprivileged ports, since it means that some process that might not be running as root has done that. I don't recall if the z/OS NFS client can be made to only make requests on secure ports or not. If not, then you'll have to tell your NFS server to accept requests on unprivileged ports. Mark Post -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/ Please consider the environment before printing this email. Visit our website at http://www.nyse.com Note: The information contained in this message and any attachment to it is privileged, confidential and protected from disclosure. If the reader of this message is not the intended recipient, or an employee or agent responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this communication in error, please notify the sender immediately by replying to the message, and please delete it from your system. Thank you. NYSE Euronext. -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/ -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/
Re: RSH RPM
I'm running SLES 11 SP 1 and I didn't have any problem finding the RSH server. yast Network Services Network Services (xinetd) Service: exec Toggle Status rsh-server installation: Install ok Toggle Status Finish quit Yes, it is unsecure. But if you are only bouncing around within the mainframe (all using the same subnets), you never get out on the wire. Tom Duerbusch THD Consulting >>> saurabh khandelwal 9/19/2011 4:32 AM >>> Hello, I want to configure RSH/RLOGIN into my SUSE 11 z/linux setup. and I am looking for rsh-server-0.17-25.4 rpm, which will help me to run rsh server. Can you help me with the website to download it for z/Linux RPM. -- Thanks & Regards Saurabh Khandelwal -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/ -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/
Re: excellent explanation of cloud computing....
I don't really know. I never bothered to look it up. Back in 73/74 time frame, a company in St. Louis was getting rid of their old teletypes. I seem to remember they were going to the newer teletype model 43 ?? Anyway, he pointed to the ones without paper tape, and said they were ASRs and pointed to the ones with paper tape and say they were KSRs. I assumed he knew what he was talking about. But with the paper tape models there were 5 level (bodot?) and 8 level (something). The 110 baud modem, which weighed 40-50 pounds, was most of the stand it was on. We hooked it into the phone system, which was illegal back then, and I could dial back into the mainframe (OS/VS 1 at that time) and use TSO. Printing out a listing on the teletype in my apartment was sure noisy. Tom Duerbusch THD Consulting >>> "McKown, John" 9/14/2011 1:16 PM >>> I thought the paper tape TTYs were called ASR (Automatic Send Receive?) instead of KSR (Keyboard Send Receive). I remember using one back in high school at a special program at TCU in Ft. Worth. I was impressed. Not with the KSR, but with the professor who apologized for being late - he was trading in his 2 year old Rolls Royce for a new one. -- John McKown Systems Engineer IV IT Administrative Services Group HealthMarkets(r) 9151 Boulevard 26 * N. Richland Hills * TX 76010 (817) 255-3225 phone * john.mck...@healthmarkets.com * www.HealthMarkets.com Confidentiality Notice: This e-mail message may contain confidential or proprietary information. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message. HealthMarkets(r) is the brand name for products underwritten and issued by the insurance subsidiaries of HealthMarkets, Inc. -The Chesapeake Life Insurance Company(r), Mid-West National Life Insurance Company of TennesseeSM and The MEGA Life and Health Insurance Company.SM > -Original Message- > From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On > Behalf Of Tom Duerbusch > Sent: Wednesday, September 14, 2011 12:43 PM > To: LINUX-390@VM.MARIST.EDU > Subject: Re: excellent explanation of cloud computing > > And if you really wanted to keep a good backup, you used the > mylar tape. > > I still have my Teletype 33 with paper tape unit (I think it > was a KSR model) along with supplies. > I'm good to go when the rapture occurs! > > Tom Duerbusch > THD Consulting > > >>> Paul Dembry 9/14/2011 12:18 PM >>> > Reminds me of the old days when I used a teletype and telephone modem, > although back then I had a paper tape backup for my programs. > > -- > For LINUX-390 subscribe / signoff / archive access instructions, > send email to lists...@vm.marist.edu with the message: INFO > LINUX-390 or visit > http://www.marist.edu/htbin/wlvindex?LINUX-390 > -- > For more information on Linux on System z, visit > http://wiki.linuxvm.org/ > > -- > For LINUX-390 subscribe / signoff / archive access instructions, > send email to lists...@vm.marist.edu with the message: INFO > LINUX-390 or visit > http://www.marist.edu/htbin/wlvindex?LINUX-390 > -- > For more information on Linux on System z, visit > http://wiki.linuxvm.org/ > > -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/ -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/
Re: excellent explanation of cloud computing....
And if you really wanted to keep a good backup, you used the mylar tape. I still have my Teletype 33 with paper tape unit (I think it was a KSR model) along with supplies. I'm good to go when the rapture occurs! Tom Duerbusch THD Consulting >>> Paul Dembry 9/14/2011 12:18 PM >>> Reminds me of the old days when I used a teletype and telephone modem, although back then I had a paper tape backup for my programs. -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/ -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/
Re: Regina on SLES 11 SP 1
Thanks Mark That was it. I would have thought that my current directory would be searched prior to searching the path. I didn't need to specify a path for the execs I created on SLES7 thru SLES10. I guess it is possible that I accidently, always, put the execs in a directory that was in the path, but that is kind of stretching it. Anyway, I can work with specifying the path. Thanks Tom Duerbusch THD Consulting >>> Mark Post 8/31/2011 4:18 PM >>> >>> On 8/31/2011 at 05:05 PM, Tom Duerbusch wrote: > I downloaded and mounted the sdk for SLES 11 SP 1 and installed regina. > > I then code a simple rexx exec to validate that rexx is functional. But > when I execute it, I get: > > linux74:/home/duerbuscht # regina thd01.rexx > Error 3 running "thd01.rexx": Failure during initialization > Error 3.1: Failure during initialization: Program was not found Try doing "regina ./thd01.rexx" or putting thd01.rexx somewhere in your PATH. Mark Post -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/ -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/
Regina on SLES 11 SP 1
I downloaded and mounted the sdk for SLES 11 SP 1 and installed regina. I then code a simple rexx exec to validate that rexx is functional. But when I execute it, I get: linux74:/home/duerbuscht # regina thd01.rexx Error 3 running "thd01.rexx": Failure during initialization Error 3.1: Failure during initialization: Program was not found The following is the rexx code: linux74:/home/duerbuscht # cat thd01.rexx /* regina test 01 */ do i = 1 to 10 say 'hi' end And the version of Regina is: linux74:/home/duerbuscht # regina -v REXX-Regina_3.4(MT) 5.00 30 Dec 2007 I am stumped. So the first question isdoes anyone have Regina working on a SLES 11 SP 1 system? The iso that I downloaded from Novell is: SLE-11-SP1-SDK-DVD-s390x-GM-DVD1.iso Did you use that one, or did you get Regina some other way? Thanks Tom Duerbusch THD Consulting -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/
Re: Novell Netware to Samba
I don't know. I do know enough to know that I don't know enough to know if I know enough to continue . Hence my questions to the group. Per the documentation, Samba can use LDAP. And from your first web reference, it sure looks real easy. And much easier now that I'm looking at my Netware Server properties. I think I know what gets filled in. Can it really be that simple? Tom Duerbusch THD Consulting >>> Patrick Spinler 8/29/2011 2:20 PM >>> It's been a while since I've worked much with Samba, but just a thought: I had thought that Samba could keep user info in and do authentication to an LDAP directory, no (e.g. http://goo.gl/3vx1E or http://goo.gl/V7Sro or http://goo.gl/eUHXM)? Given that, just load eDirectory with the appropriate samba ldap schema, update your user definitions to include the samba attributes, and point samba servers at your eDirectory for user info and authentication. Voila. -- Pat On 8/29/11 12:54 PM, Tom Duerbusch wrote: > To clarify... > > Unless I'm force to, which would terminate the project, we are not looking > for a complete replacement for Netware. At this point, it would be "cool" to > be able to add in a Samba server to the existing authentication process. > > We don't do print serving. As far as I know, our PCs only print to a > JetDirect attached printer (i.e. LPR). > > When I look at the properties for the Netware FileServer, IPX: is shown as > N/A. IP: had an IP address associated with it. I'm guessing that means we > are doing authentication over IP. > > Right now, we have 9 Samba servers running. Some in production and others in > test. > Due to their limited number of users, I didn't need to worry about > authentication. > Our "manual" server, everyone has read access to it. > Another server, is part of an application which uses UNC for viewing. The > end users don't have any idea they are accessing Samba. All > additions/updates are done under the covers by the application. > I'm just in the process of rolling out Samba servers to replace LANRES/VSE. > Couple dozen users. Not a security headache. They do have to enter in their > Samba password if it is not the same as their Netware password (which it > isn't). > > And with the success of these Samba servers, management is asking if we can > replace the 2,000 Netware users with Samba. The big sticking point that I > know of, if I need to be able to sync the Samba password with their Novell > password. Lack of that function affects everyone. I would like to be able > to keep using Netware to define the users directory, but that is more of a > training issue then a real requirement. We can use SWAT to manage Samba > users if necessary. > > Thanks for the suggestions. > -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/
Re: Novell Netware to Samba
To clarify... Unless I'm force to, which would terminate the project, we are not looking for a complete replacement for Netware. At this point, it would be "cool" to be able to add in a Samba server to the existing authentication process. We don't do print serving. As far as I know, our PCs only print to a JetDirect attached printer (i.e. LPR). When I look at the properties for the Netware FileServer, IPX: is shown as N/A. IP: had an IP address associated with it. I'm guessing that means we are doing authentication over IP. Right now, we have 9 Samba servers running. Some in production and others in test. Due to their limited number of users, I didn't need to worry about authentication. Our "manual" server, everyone has read access to it. Another server, is part of an application which uses UNC for viewing. The end users don't have any idea they are accessing Samba. All additions/updates are done under the covers by the application. I'm just in the process of rolling out Samba servers to replace LANRES/VSE. Couple dozen users. Not a security headache. They do have to enter in their Samba password if it is not the same as their Netware password (which it isn't). And with the success of these Samba servers, management is asking if we can replace the 2,000 Netware users with Samba. The big sticking point that I know of, if I need to be able to sync the Samba password with their Novell password. Lack of that function affects everyone. I would like to be able to keep using Netware to define the users directory, but that is more of a training issue then a real requirement. We can use SWAT to manage Samba users if necessary. Thanks for the suggestions. Tom Duerbusch THD Consulting >>> David Boyes 8/28/2011 1:59 AM >>> > > The eDirectory product is only available on Netware (as you have now) > > and Open Enterprise Server (OES) running on SLES on Intel/AMD systems. > > If you're going to be running OES for eDirectory, you might as well > > use the other parts of OES on that system, which include the various > > file server functions that people are used to from Netware. I believe > > this does involve Samba, but I'm not all that familiar with OES. Well, there's 3 things to solve here: authentication, file service, and printing. You're going to have to touch all the endpoints for all three things. Best solution (without trying to convince Attachmate to port OES) is: 1) Use Active Directory or Kerberos/LDAP to replace Netware authentication. 2) Use Samba and winbind to manage the file service component 3) Use CUPS to replace the print functions. AD is essentially Kerberos/LDAP, but with a pretty face on it. If you have extensive reliance on Windows, you might as well use AD too. It addresses most of the issues that made Netware user management and authentication a PITA in the past, although it has its own evils. The winbind piece will cause Samba to deal properly with the uid and gid issues -- if you convert to AD using the netware to AD tools, most of the ACLs will still work properly. CUPS will probably need some tinkering with if you have non-mainstream (eg, non-HP) printers, especially Canon printers (for some reason, they seem to hate Linux and Mac users and don't publish good PPF files for their printers). Contact me offlist if you want to discuss it. -- db > > My knowledge is a bit rusty on this but let me clarify a few things. > > eDirectory is a standalone product althought it is included in many Novell > products like OES. eDirectory can run on a number of OSes like Linux, > Solaris, > AIX and Windows and is an LDAP based directory. eDirectory only runs on > Linux on x86/x86_64 based systems. > > One option is that you could keep the Netware around and connect Samba > via LDAP. eDirectory on Netware 5 is old and that might cause problems. > > A better option would be to get eDirectory installed on Linux, join the > directory tree on the Netware server so it can become a replica, and then > promote the directory on the Linux box so the Netware server could be > turned off. Not that I want to see a Netware box get turned off but maybe > the organization is more comfortable with Linux. > > A couple of ideas for you to contemplate > > Mike > > -- > For LINUX-390 subscribe / signoff / archive access instructions, send email to > lists...@vm.marist.edu with the message: INFO LINUX-390 or visit > http://www.marist.edu/htbin/wlvindex?LINUX-390 > -- > For more information on Linux on System z, visit http://wiki.linuxvm.org/ ---
Novell Netware to Samba
I've been asked to look into something that I'm not sure how much I know about... But that is par for the course. Somewhere, we have a Novell Netware File Server (apparently NetWare 5.70.05). The person that really knew and installed this server, left over a year ago, and there is really not going to be a replacement for the job function/title, or for that matter, the position will not be filled either. This fileserver supports the F: drive on some 2,000 PCs. It represents the users private network space. The SAN that is dedicated to this is about 2TB. I've been asked to see what it would take to convert this from Netware to Samba on our mainframe (SUSE 11 SP 1). Well, we would need to add in some drives to our DS6800 (ficon attached). I believe we have sufficient CPU and memory in to support this. I've never tried, but there is documentation about some sort of automatic way of adding users to Samba, but I don't know if this applies to my configuration. Of the many security systems we have, it looks like NetWare is using eDirectory. I don't know if other systems are also using eDirectory. If they are, then it would be nice to have Samba keep using eDirectory. I might have skipped it but I haven't found any documentation about Samba using eDirectory. (I didn't know until 10 minutes ago that we are using eDirectory as I thought we were using Microsofts something...something.) If this conversion can be somewhat easily done, then I will keep going forward with this research. But if it is going to be complicated, I'm not so interested. Of course management has a lot to say about what I'm interested in . BTW, on the Novell login, we enforce password changes and it syncs with the Windows password. When the user Mounts the F: drive, they are never asked for a userid/password. We don't want to loose that feature, with 2,000 users. On another Samba server I have, which isn't connected to eDirectory, when smbpasswd has your current Novell password, mount requests are handled without authentication prompting. When smbpasswd doesn't have the current Novell password, it does prompt for the password Samba knows about (not your current Novell password). So it seems that, within Windows, a mount will pass your current Windows userid/password (which it kept in sync) to Samba. Any guidance would be appreciated. Tom Duerbusch THD Consulting -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/
Re: disabled IPV6, now down.
mv -vi /etc/modprobe.d/50-ipv6.conf /root/ mv -vi /etc/modprobe.d/50-ipv6.conf /root/ `/etc/modprobe.d/50-ipv6.conf' -> `/root/50-ipv6.conf' linux76:~ # modprobe ipv6 modprobe ipv6 NET: Registered protocol family 10 lo: Disabled Privacy Extensions linux76:~ # modprobe qeth-l3 modprobe qeth-l3 qeth.2c6def: register layer 3 discipline linux76:~ # rcnetwork restart rcnetwork restart Shutting down network interfaces: Shutting down service network . . . . . . . . ...done Hint: you may set mandatory devices in /etc/sysconfig/network/config Setting up network interfaces: Setting up service network . . . . . . . . . ...done SuSEfirewall2: Setting up rules from /etc/sysconfig/SuSEfirewall2 ... SuSEfirewall2: Warning: no interface active SuSEfirewall2: batch committing... SuSEfirewall2: Firewall rules successfully set linux76:~ # ifconfig ifconfig loLink encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:2 errors:0 dropped:0 overruns:0 frame:0 TX packets:2 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:100 (100.0 b) TX bytes:100 (100.0 b) linux76:~ # So I rebooted the server and now I'm up and running ifconfig -a eth0 Link encap:Ethernet HWaddr 02:00:01:00:00:14 inet addr:192.168.193.176 Bcast:192.168.195.255 Mask:255.255.252.0 inet6 addr: fe80::200:100:100:14/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1492 Metric:1 RX packets:219 errors:0 dropped:0 overruns:0 frame:0 TX packets:209 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:21915 (21.4 Kb) TX bytes:87504 (85.4 Kb) loLink encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:2 errors:0 dropped:0 overruns:0 frame:0 TX packets:2 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:100 (100.0 b) TX bytes:100 (100.0 b) linux76:~ # And back to my original problem of the: MARTIAN SOURCE 192.168.195.255 FROM 192.168.193.176, ON DEV ETH0 messages... It's the only image that is producing these messages. I must of done something in my playing around to cause them... Well, onward and downward! Thanks Tom Duerbusch THD Consulting >>> Mark Post 8/3/2011 12:18 PM >>> >>> On 8/3/2011 at 12:47 PM, Tom Duerbusch wrote: > No big deal in recreating this system. But it would be an interesting > learning exercise in recovering from my failure. mv -vi /etc/modprobe.d/50-ipv6.conf /root/ modprobe ipv6 modprobe qeth-l3 That might be enough. Or, you may need to: rcnetwork restart Mark Post -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390
Re: disabled IPV6, now down.
Well, it didn't say it did anything: modprobe ipv6 linux76:~ # Tom Duerbusch THD Consulting >>> Scott Rohling 8/3/2011 12:04 PM >>> Does a 'modprobe ipv6' have any effect? Scott Rohling On Wed, Aug 3, 2011 at 10:47 AM, Tom Duerbusch wrote: > I've been getting the "MARTIAN SOURCE 192.168.195.255 FROM 192.168.193.176, > ON DEV ETH0" on one of my test machines for two months. > > So I decided to check it out and see if I can fix the problem. > > Per a Google search, I found a suggestion which looked reasonable: > > More details would be needed. > ifconfig -a > route -n > cat /etc/sysconfig/network/routes > > When I did them, I saw that IPV6 was up and running. I thought some of my > playing around caused IPV6 to be enabled. I didn't realize that IPV6 comes > up by default and we are not IPV6 on our network, so I decided to see what > happens when I disable it. > > So, yast, network, network settings, Global Options tab, and disable IPv6, > save it and reboot. > > Of course now, I can't get in (other than via the console). > I lost my eth0 adapter: > > ifconfig -a > loLink encap:Local Loopback > inet addr:127.0.0.1 Mask:255.0.0.0 > UP LOOPBACK RUNNING MTU:16436 Metric:1 > RX packets:2 errors:0 dropped:0 overruns:0 frame:0 > TX packets:2 errors:0 dropped:0 overruns:0 carrier:0 > collisions:0 txqueuelen:0 > RX bytes:100 (100.0 b) TX bytes:100 (100.0 b) > > linux76:~ # > > > I tried to add eth0 back in: > > ifconfig eth0 add fe80::200:100:100:14/64 > No support for INET6 on this system. > linux76:~ # > > But I don't know how to add support for INET6 via the command line > interface. > > This is SLES 11 SP 1. > > No big deal in recreating this system. But it would be an interesting > learning exercise in recovering from my failure. > > Tom Duerbusch > THD Consulting > > -- > For LINUX-390 subscribe / signoff / archive access instructions, > send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or > visit > http://www.marist.edu/htbin/wlvindex?LINUX-390 > -- > For more information on Linux on System z, visit > http://wiki.linuxvm.org/ > -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/ -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/
disabled IPV6, now down.
I've been getting the "MARTIAN SOURCE 192.168.195.255 FROM 192.168.193.176, ON DEV ETH0" on one of my test machines for two months. So I decided to check it out and see if I can fix the problem. Per a Google search, I found a suggestion which looked reasonable: More details would be needed. ifconfig -a route -n cat /etc/sysconfig/network/routes When I did them, I saw that IPV6 was up and running. I thought some of my playing around caused IPV6 to be enabled. I didn't realize that IPV6 comes up by default and we are not IPV6 on our network, so I decided to see what happens when I disable it. So, yast, network, network settings, Global Options tab, and disable IPv6, save it and reboot. Of course now, I can't get in (other than via the console). I lost my eth0 adapter: ifconfig -a loLink encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:2 errors:0 dropped:0 overruns:0 frame:0 TX packets:2 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:100 (100.0 b) TX bytes:100 (100.0 b) linux76:~ # I tried to add eth0 back in: ifconfig eth0 add fe80::200:100:100:14/64 No support for INET6 on this system. linux76:~ # But I don't know how to add support for INET6 via the command line interface. This is SLES 11 SP 1. No big deal in recreating this system. But it would be an interesting learning exercise in recovering from my failure. Tom Duerbusch THD Consulting -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/
Re: Showing a process running in BG
Thanks Scott. That pretty well shows that my tar is, somehow, running in background. root 30702 2.1 1.6 2920 1156 ?R11:57 0:01 tar -b 64 -vv - The 'jobs' command doesn't show anything as I didn't start the 'tar' within my session. Although both my telnet session and the rexec are being executed under root, 'jobs' seems to be based on your session and not all background processes. In the short term, if I don't redirect the output to a file, the output is displayed in the VSE job that submitted the REXEC command. I can save those printouts so we know what is on our backup tapes. Much better than having tar scan each of the tapes for what files are on them, or at least, much, much, quicker. Thanks for the help. Boy, did I learn a lot of other stuff while researching this problem. Tom Duerbusch THD Consulting >>> Scott Rohling 8/1/2011 11:38 AM >>> The 'jobs' command lists all active or stopped jobs (in the current shell).. also - ps -aux shows a '+' under the Status field if it's running in the foreground. With ps -ef the PID and PPID fields may help in determining who called what. Hope this helps. Scott Rohling On Mon, Aug 1, 2011 at 9:32 AM, Tom Duerbusch wrote: > I have a process that may or may not be running in background. > > When I use any of the forms of "ps", it shows the process running, but, I > don't understand if any of the fields being displayed, indicate that this is > a BG process. It all looks the same to me . > > If the process is running in the background, I need to follow the path of > how did it get there (bg). If the process isn't running in background, I > have a different problem all together. > > Thanks > > Tom Duerbusch > THD Consulting > > -- > For LINUX-390 subscribe / signoff / archive access instructions, > send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or > visit > http://www.marist.edu/htbin/wlvindex?LINUX-390 > -- > For more information on Linux on System z, visit > http://wiki.linuxvm.org/ > -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/ -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/
Showing a process running in BG
I have a process that may or may not be running in background. When I use any of the forms of "ps", it shows the process running, but, I don't understand if any of the fields being displayed, indicate that this is a BG process. It all looks the same to me . If the process is running in the background, I need to follow the path of how did it get there (bg). If the process isn't running in background, I have a different problem all together. Thanks Tom Duerbusch THD Consulting -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/
Re: tar with tape drives
And another thing. It isn't a problem with REXEC or REXECD. Instead of executing each command via REXEC to Linux, I created a script which had all the commands in it. So, REXEC only executed the script. But what happened was The tar was being executed. Long before the tar completed, bash started executing the remainder of the commands in the script. However tar was still running (and keeping the tape drive in use). This is similar to tar being executed asynchronously. However, when I run the script interactively, from Putty (actually Kitty), the command runs like it is suppose to. Only when the tar completes does the next command start to executed. So, it seems, at this point, that tar knows when it is being executed remotely and returns control early (and continues to execute). However, executing the script using VM's REXEC, didn't produce the asynchronous behavior. So, REXEC from VSE using the CSI 1.5E stack seems to be telling tar something that REXEC from VM (z/VM 5.2) isn't. Time for a beer. Tom Duerbusch THD Consulting >>> Carsten Otte 7/28/2011 8:41 AM >>> Hi Tom, if I recall correctly, we reserve the tape on open, and free it on closing the file descriptor. You shout be able to find out which process is using it via "fuser /dev/ntibmX". with kind regards Carsten Otte IBM Linux Technology Center / Boeblingen lab -- omnis enim res, quae dando non deficit, dum habetur et non datur, nondum habetur, quomodo habenda est -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/ -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/
Re: tar with tape drives
I found out what was happening. Summary: We had a problem where tar seemed to be keeping a tape drive for somewhere between 5 and 20 minutes after it completed. But this only happened when using REXEC from VSE. REXEC from VM or an interactive tar from a telnet session, did not show this behavior. While having a vmstat 10 1000 running on the machine that the tar was running on, I discovered the actual problem. The rexecd server in Linux (SLES 11 SP 1), was returning from the tar command before the command had completed. So, why the tape drive showed it was still in use, well the tar was still running. REXECD came back to VSE (a batch job) and then tried issuing additional commands, which failed due to the tape drive was still in use. Additionally, I was producing a listing of files that were being backed up. When I redirected the list of files to a disk file, the tar didn't produce any output once it started. Something...i.e. REXECD perhaps decided that the command did finish without any output and returned back to the client. When I did the same tar command and had the list of files being backed up sent back to VSE, i.e. a very active connection, REXECD didn't return back to the client until the tar was finished. Weird type of thing. I'm not really up on pipes and Linux, but in the VM world, I can pipe output to the console and to a file without blocking the stage. Is there something similar in the Linux world so I can keep the listing and keep the connection active? Thanks Tom Duerbusch THD Consulting >>> Carsten Otte 7/28/2011 8:41 AM >>> Hi Tom, if I recall correctly, we reserve the tape on open, and free it on closing the file descriptor. You shout be able to find out which process is using it via "fuser /dev/ntibmX". with kind regards Carsten Otte IBM Linux Technology Center / Boeblingen lab -- omnis enim res, quae dando non deficit, dum habetur et non datur, nondum habetur, quomodo habenda est -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/ -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/
Re: tar with tape drives
Upon further testing When I issue the tar command from telnet, the tape drive becomes UNUSED as soon as the tar command completes. When I issue the tar command from CMS using REXEC, the tape drive becomes UNUSED as soon as the tar command completes. However, when I issue the tar command from a VSE Batch job using REXEC, the drive remains IN-USE for a long period of time after the VSE job terminates. That is really unexpected. Now for some further research Tom Duerbusch THD Consulting -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/
tar with tape drives
I'm doing a tar to a 3590 tape drive. Sample command is: tar -b 64 -vv -pcf /dev/ntibm0 /home > /home/tarlisting/bkup.lst When it finishes, tar doesn't free up the tape drive. lstape shows that the drive is still in use: linux74:/home # lstape FICON/ESCON tapes (found 1): TapeNo BusID CuType/Model DevType/Model BlkSize State Op MedState 0 0.0.05b0 3590/50 3590/11 autoIN_USE WRI LOADED SCSI tape devices (found 0): Generic DeviceTarget Vendor ModelType State Which then causes other commands to fail, such as: linux74:/home # mtst -f /dev/ntibm0 rewind /dev/ntibm0: Device or resource busy Eventually, longer than 5 minutes but less then 30 minutes, the IN_USE state drops back to UNUSED and I can go back to issuing tape commands. I've been reading the tar INFO manual looking to see if tar will hold a drive for a period of time, perhaps to be able to append another tar image or something like that. I haven't found anything yet. So is there something else I need to be looking at? I can solve this by looping a mtst within a script until the return code equals 0, but I would much rather have my tape drive back immediately. Thanks Tom Duerbusch THD Consulting -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/
VM to zLinux Remote Execution
I'm trying to remotely execute a command with CMS as the client and SLES 11 SP 1 as the server. All documentation I've found so far, shows how to do it from Linux to VM. Apparently the problem is, TCPIP for VM only has the unsecured REXEC client and SLES 11 only has a secured sshd. I've searched the VM download page for a ssh client. I've done some Linux searches for how to dumb down sshd (i.e. to allow unsecured transfers). Of course, there might be program products available, but unless they would be zero cost products, it's not going to happen in the short term. Thanks for any help Tom Duerbusch THD Consulting (Still on z/VM 5.2) -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/
Re: Linux backups and restores to/from tape
The poor mans way is to use "tar" and output to tape. Pipe the listing to a file and keep the file around so you know what is on that tar file. You can restore any member(s) and, if needed, put the restored members in a different directory. In any case, you need a logical backup of your files. Tom Duerbusch THD Consulting >>> "Frederick, Michael" 7/8/2011 10:23 AM >>> Hi all, A question came up about getting an older version of a file on a Linux disk, which I was able to do by restoring the DASD that held the file in question to a temporary disk and then they could do whatever they liked with the file, easy enough. It got me to thinking about, what would happen if this were to take place on an LVM? Having a dasd-level backup is likely to be of limited use in this case, because you'd more than likely have to restore the entire LVM to a separate set of disks just to get at that one file. So does anyone know of a solution (free being better) that would do a file-level backup for zLinux to a tape? Or has anyone dealt with this problem before and had some other way around it? Thanks in advance, Mike Frederick -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/ -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/
Re: CMS commands from Linux
If you are on the same mainframe, i.e. it doesn't have to go out on the network, what was wrong with using REXEC to remote execute CMS commands? VM supports it. I don't know if Linux does (or has a RPM for it). Tom Duerbusch THD Consulting >>> Scott Rohling 6/21/2011 8:44 AM >>> I built a provisioning server this way once.. on the Linux side - just a 'wget' and pass a bunch of parms: wget http://x.x.x.x/cgi-bin/makelnx?lnx001+WEBAPP+1G+4G+VSWITCH2+.. .. Running Webshare on z/VM and the 'makelnx' CGI was a REXX EXEC that did all the dirmaint/racf/cloning stuff.. and wrapped it's output in simple html tags (so the Linux side could examine for success/failure and keep logs using the wget output). Only trouble here is security... how to ensure the function can only be used by 'authorized' requesters. Webshare doesn't normally qualify as a secure interface. If what the EXEC does is benign - then maybe it's no big deal... it can be a great way to easily make z/VM application output available to Linux. Scott Rohling On Tue, Jun 21, 2011 at 7:24 AM, Agblad Tore wrote: > setup a webserver in z/VM, and allow the Linux to run a rexx inside the > webserver via http :) > > Cordialement / Vriendelijke Groeten / Best Regards / Med Vänliga Hälsningar > Tore Agblad > > Tore Agblad > System programmer, Volvo IT certified IT Architect > Volvo Information Technology > Infrastructure Mainframe Design & Development, Linux servers > Dept 4352 DA1S > SE-405 08, Gothenburg Sweden > Telephone: +46-31-3233569 > E-mail: tore.agb...@volvo.com > http://www.volvo.com/volvoit/global/en-gb/ > > From: Linux on 390 Port [LINUX-390@VM.MARIST.EDU] On Behalf Of van > Sleeuwen, Berry [berry.vansleeu...@atosorigin.com] > Sent: Friday, June 10, 2011 16:56 > To: LINUX-390@VM.MARIST.EDU > Subject: Re: CMS commands from Linux > > Hi Fabio, > > Once you are running linux you can't execute CMS commands. This is because > you're not running CMS anymore. So if you need to run a rexx you need to > rewrite it to a bash script. And obviously you can't have CMS commands in > the bash script. > > Regards, Berry. > > > -Original Message- > > From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of > > Fábio Paim > > Sent: vrijdag 10 juni 2011 16:41 > > To: LINUX-390@VM.MARIST.EDU > > Subject: CMS commands from Linux > > > > Hi, > > > > I have a script rexx in zVM and I need execute it from Linux, How is this > > possible? How I can send commands CMS from linux (or send Linux > > commands from z/VM) , I know the command "vmcp", but it only for > > command CP. > > > > Thanks > > > > > > Fábio Paim > > Analista de sistemas > > > > -- > > For LINUX-390 subscribe / signoff / archive access instructions, send > email to > > lists...@vm.marist.edu with the message: INFO LINUX-390 or visit > > http://www.marist.edu/htbin/wlvindex?LINUX-390 > > -- > > For more information on Linux on System z, visit > http://wiki.linuxvm.org/ > > -- > For LINUX-390 subscribe / signoff / archive access instructions, > send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or > visit > http://www.marist.edu/htbin/wlvindex?LINUX-390 > -- > For more information on Linux on System z, visit > http://wiki.linuxvm.org/ > > -- > For LINUX-390 subscribe / signoff / archive access instructions, > send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or > visit > http://www.marist.edu/htbin/wlvindex?LINUX-390 > -- > For more information on Linux on System z, visit > http://wiki.linuxvm.org/ > -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/ -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/
Re: Set Share Relative
Am I the first? That is what we were taught with 390 systems. You also didn't want your communications region to be paged out (set reserved for those). You always gave communications very high priority. You didn't want your 3270 traffic waiting. If, due to resources, you needed to wait, you waited in CICS or DB2, both of which used variable amount of resources for any transaction. But 3270 traffic, same old, same old, day to day. Get it processed as fast as you can. Obviously, FTP thru a monkey wrench if the stack that serviced FTP was high priority. Direct printing wasn't a problem with a high priority stack, but now that all printing is buffered, you don't want printing to be on a high priority stack either. The paper and your point seems to only be for Linux systems. And they are unique things compared to historic 390 processing. It would be interesting to see the same experiment done with multiple VSE systems. Anyway, I think the point is that Linux isn't a traditional 390 Operation System. And you can't take they things you know and apply them to Linux with a near 100% success rate. Using my, home grown performance tool, over the span of months, I see my 16 VSE systems taking resources just like we were taught (200 is twice as much as 100). But my IFL side, not that we are normally busy enough for relative shares to take effect, just didn't seem to match up with the relative shares defined. The paper did explain things. OK, so it didn't make sense, but that is why a lot of us thing "relative shares" the way we do. Tom Duerbusch THD Consulting >>> Rob van der Heij 6/14/2011 3:56 PM >>> On Tue, Jun 14, 2011 at 7:57 PM, Scott Rohling wrote: As for "wrong" - I thought that was beaten to death already. I buy an adult beverage for the first* who can explain why it makes sense to have the TCPIP stacks with a relative share 30 times higher than their Linux production guests. Rob -- Rob van der Heij Velocity Software http://www.velocitysoftware.com/ -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/ -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/
Re: LVM on CKD?
Lot's of us/most of us, have LVM with CKD devices. Never been a problem. First question, do you have CKD devices available? i.e. in your VM directory, are the disks defined to Linux defined like: MDISK 0150 3390 0001 10016 L1305F MR MINIOPT NOMDC MDISK 0160 3390 0001 10016 L13063 MR MINIOPT NOMDC MDISK 0161 3390 0001 10016 L13195 MR MINIOPT NOMDC MDISK 0162 3390 0001 03338 L1361C MR MINIOPT NOMDC Note the 3390 device type. My first guess, is that you have native devices defined in the directory and Linux is trying to correct your configuration to match reality. Otherwise, need more info... Tom Duerbusch THD Consulting >>> Craig Collins 6/8/2011 3:00 PM >>> Is anyone using an LVM configuration with CKD or EDEV devices? We're trying to install SLES11 SP1 on EDEVs and wanted to setup a data LUN using LVM but YaSt keeps changing the type to native linux when we set it to LVM. Not sure if we are doing something wrong or LVM is not supported on these types of devices. Craig Collins State of WI, DOA, DET -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/ -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/
Re: z/Linux Oracle question
It all depends on what they are trying to door if they are blindly following recommendations for the PC world. Or, for that matter, they know they have 30 GB of disk space on a current server (and not telling you how much is used). On my Oracle test systems, I have: 1. 3390-9 for Linux and Oracle software. Used 2.4 GB 2. (2) 3390-9 in a LVM for Oracle data.Used 13 GB 3. (2) VDISK for swap. 300 MB and 600 MB. Max used about 15%. LVM is used as it is very easy to add volumes and let Oracle expand the tablespaces. The real question is how much data are they planning on putting on the test database? Tom Duerbusch THD Consulting >>> Henry E Schaffer 5/25/2011 1:37 PM >>> I'm just wondering about quantities of disk space that concern people. Is 30GB noticeable - or in the noise? --henry schaffer -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/ -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/
Re: Samba Authorization another question
It's not a matter or like or not, just rather not . Yep, I've looked at it. It does what you say, but Unlike Novell/Windows saying your password is going to expire, the Linux/Samba side doesn't say anything. When the Novell/Windows password is changed, the next time the user tries to use Samba (first time clicking on the Samba drive letter for that Windows session), they are challenged with a logon prompt, in which they are not use to seeing. This doesn't give you a clue that your password needs to be changed. So that means lots of calls to the help desk. I think we enforce password changes every 90 days. And then they forget their password, which means the help desk needs to sign on via SWAT with an admin user to change their password. Only talking about 100 or so users. Right now, I'm tempted to go with a fixed, never expire password, that they have to give every new Windows session (normally after every boot), except that would go against our security policy. Any ramifications to that, comes back to me. The open systems person that set up all the PC security left for greener pastures. There is one or two people trying to grasp how the current stuff works. They are resistant to putting something new in the mix. Eventually, they will get over it, but right now, it is holding up this project. Tom Duerbusch THD Consulting >>> "Dean, David (I/S)" 4/27/2011 10:55 AM >>> You won't like this, but,... in swat there is a password icon that we have our users access to change passwords whenever their Windows pw changes. It's easy enough for end users. I "believe" you can even configure this so the end user sees only the password icon, but not sure. -Original Message----- From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of Tom Duerbusch Sent: Wednesday, April 27, 2011 11:13 AM To: LINUX-390@VM.MARIST.EDU Subject: Samba Authorization another question Of all my samba servers, this is the first attempt at being something that end users would directly interface with, just like they do with our Novell file servers. I've tried to force myself to use SWAT, but until I get everything working from the command line, SWAT is just going to have to wait. I'm not a Windows or PC security type, in any way, shape, or form, and that, I think, is my problem What I would really like to do, is if a Windows user tries to access a Samba share, and the username and the share name, match, you are good to go. If the Windows user doesn't match the share, reject. Right now, I can do this, if I maintain the SMBPASSWD file. If I put their current windows password in there, no problem. However, 1. I won't know the end users current password. 2. We force password changes and I won't know their new passwords either. If the passwords don't match, a window is displayed asking for their samba password. When entered, everything is good to go. I would like to get away from the users having to enter in this password. If I disable the password checking, the end users can mount any other users directory. That's not good either. I have "passdb backend = tdbsam" specified. I don't really need any fancy authorization, just if it the user is the same as the share, you're authorized. The manuals on migrating windows servers to Samba seem to be really overkill for what we need, but that just may be what needs to be done. SLES11 SP1 with Samba 3.5 Any simple solutions to this problem? Thanks Tom Duerbusch THD Consulting -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/ - Please see the following link for the BlueCross BlueShield of Tennessee E-mail disclaimer: http://www.bcbst.com/email_disclaimer.shtm -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/ -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/
Samba Authorization another question
Of all my samba servers, this is the first attempt at being something that end users would directly interface with, just like they do with our Novell file servers. I've tried to force myself to use SWAT, but until I get everything working from the command line, SWAT is just going to have to wait. I'm not a Windows or PC security type, in any way, shape, or form, and that, I think, is my problem What I would really like to do, is if a Windows user tries to access a Samba share, and the username and the share name, match, you are good to go. If the Windows user doesn't match the share, reject. Right now, I can do this, if I maintain the SMBPASSWD file. If I put their current windows password in there, no problem. However, 1. I won't know the end users current password. 2. We force password changes and I won't know their new passwords either. If the passwords don't match, a window is displayed asking for their samba password. When entered, everything is good to go. I would like to get away from the users having to enter in this password. If I disable the password checking, the end users can mount any other users directory. That's not good either. I have "passdb backend = tdbsam" specified. I don't really need any fancy authorization, just if it the user is the same as the share, you're authorized. The manuals on migrating windows servers to Samba seem to be really overkill for what we need, but that just may be what needs to be done. SLES11 SP1 with Samba 3.5 Any simple solutions to this problem? Thanks Tom Duerbusch THD Consulting -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/
Re: Samba authorization
So far, all the responses are about the SMB.CONF file. Just a reminder, that, not only you have to put all the users in the same group for this to work, but when you create the directory structure, I believe that you also have to do a chmod 770 for that subdirectory for the group authority. And you may have to do a chuser to specify a common userid (but I'm not clear on that one). I have another samba authorization question, that I will bring up in another thread. Tom Duerbusch THD Consulting >>> "Dean, David (I/S)" 4/27/2011 9:13 AM >>> And take the space out of the directory name. -Original Message- From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of Richard Gasiorowski Sent: Wednesday, April 27, 2011 8:59 AM To: LINUX-390@VM.MARIST.EDU Subject: Re: Samba authorization Most likely the parent directory is 740 Richard (Gaz) Gasiorowski Solution Architect CSC 3170 Fairview Park Dr., Falls Church, VA 22042 845-889-8533|Work|845-392-7889 Cell|rgasi...@csc.com|www.csc.com This is a PRIVATE message. If you are not the intended recipient, please delete without copying and kindly advise us by e-mail of the mistake in delivery. NOTE: Regardless of content, this e-mail shall not operate to bind CSC to any order or other contract unless pursuant to explicit written agreement or government initiative expressly permitting the use of e-mail for such purpose. From: "van Sleeuwen, Berry" To: LINUX-390@vm.marist.edu Date: 04/27/2011 08:55 AM Subject: Samba authorization Hi Listers, On SLES10 SP2 we are running a samba. We would like to have shares for specific groups. For instance we have a group zlinux that would get access into the "PL Linux" directory and they must be able to read and write into this directory. Several resources on the net give us the configuration for this but so far we were not able to get the results we expected. The /etc/smb.conf contains: [PL Linux] # Identification comment = PL Linux # Management path= /srv/smb/shares/MFPL/PL Linux writable= yes force group = zlinux valid users = @zlinux # Access set up create mask = 0770 directory mask = 0770 force create mode= 0660 force directory mode = 0770 According to the config a new file should be created with group zlinux and mask 770. But when we create a document we see: -rwxr--r-- 1 nl12237 users 0 Apr 27 13:45 New (10) Text Document.txt So, in the group users and mask 744. What can we do to get the samba to create the file under group zlinux and with 770 instead of 744? Met vriendelijke groet/With kind regards, Berry van Sleeuwen Flight Forum 3000 5657 EW Eindhoven * +31 (0)6 22564276 -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/ -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/ - Please see the following link for the BlueCross BlueShield of Tennessee E-mail disclaimer: http://www.bcbst.com/email_disclaimer.shtm -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/ -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/
Re: multipl cpu's
The generic rules of thumb: 1. Don't define more virtual cpus than you have real available. 2. Don't define more virtual cpus than you need. With Websphere: Two cpus or more are best. Websphere has a process, in which two tasks talk to each other. If each process has a cpu then they don't have to steal the processor from one another. I think this hint came out in the SLES8 or SLES9 days. That is the timeframe that I downloaded Websphere and had an official "interest" in it...i.e. there was a project coming up. Given that was a while back, things may have changed. Tom Duerbusch THD Consulting >>> Mark Post 4/25/2011 12:09 PM >>> >>> On 4/25/2011 at 09:34 AM, "Dean, David (I/S)" wrote: > Can some of you weigh in on the merits (demerits) of defining multiple CPU's > to virtual Linux boxes? We are heavy WebSphere and have gotten differing > opinions. The typical advice is that if you are driving a single CPU over 80%, then a second one would likely be useful. Otherwise, you just add to z/VM's workload to schedule that virtual CPU with no benefit to the guest. Mark Post -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/ -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/
Re: CMM
Did you try "Developer Works"? Tom Duerbusch THD Consulting >>> "Dean, David (I/S)" 4/20/2011 3:07 PM >>> Project 1. VDISK implemented complete Project 2. CMM Will someone recommend a BASIC how-to guide for CMM on zlinux. I have googled and found many docs saying how great it is, but not how to do it. I do not want the vmrm piece to make my decisions (yet). I need to implement so I can experiment with manual changes. KISS for now. David M. Dean Information Systems BlueCross BlueShield Tennnessee - Please see the following link for the BlueCross BlueShield of Tennessee E-mail disclaimer: http://www.bcbst.com/email_disclaimer.shtm -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/ -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/
POC Tape drives for Linux
I've been in a management meeting discussing tape backup for zLinux (about time). I agreed to the following and now time to see if it is doable. As a Proof of Concept: 1. Take one of our IBM 3590 E11 drives, detach it from our current Controller. 2. Attach the drive to a fibre channel (was FICON but reconfigured as FCP). Access the tape drive for backup/restore purposes from multiple Linux images (we will manually make sure that only one image is actively using the drive at any one time). When we are satisfied that all of this works, put everything back the way it was. This will be done over one or more weekends. My impression is that there isn't different VSE/Linux tape drives. VSE accesses the drive via a controller that has multiple 3590 drives attached to it. And that a 3590 drive can be directly attached via FCP to the Linux side. So, did I open my mouth an insert foot? We are getting conflicting info on whether a SCSI switch is required, or just a nice thing to have. Phase 2 will have us acquiring a couple IBM 3590 E11 drives (autoloaders, if usable in Linux, is a good thing). Phase 3 may involve adding a switch for easier management of the tape drives. I don't dare think we would ever get to a Phase 4 (some sort of backup product/tape manager), but if some one get some grant money.... Thanks Tom Duerbusch THD Consulting -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/
Re: Backing up SLES 11 SP1 and Oracle
BTW, the main manual involved with FTP and tape processing (in case you didn't know): TCP/IP for VSE User Guide: Errata located on their website. Tom Duerbusch THD Consulting >>> David Stuart 4/6/2011 3:49 PM >>> Thanks Tom, So, you defined the NFS Server on the same Linux image as the DB? And I was wondering how you used your z/VSE System to back it up... Thanks for the ideas. Dave Dave Stuart Prin. Info. Systems Support Analyst County of Ventura, CA 805-662-6731 david.stu...@ventura.org>>> "Tom Duerbusch" 4/6/2011 1:37 PM >>> Weekly, we take a backup for disaster recovery. Take the image down. Flashcopy the disks (or backup from z/OS or z/VSE, as you don't have z/VM) Bring image up. For the logical backups. I defined an NFS server which the Linux image mounts. Nightly, I take an Oracle Backup Using OEM: Maintenance tab Backup/Recovery Schedule Backup (I make it reoccurring at 3 AM). I tell it to use a directory on the mounted NFS space. Then, during the day, when we have an Operator present. Then move a 3590 drive over to the IFL. >From another Linux image (but could be your Oracle image also) They sign on using PUTTY, and do a "tar" to the tape drive. The problem you are going to have with 3480 drives, is "tar" isn't too friendly with multiple volsers. If you ever hit end of volume with "tar", it will cancel. However, you can tell "tar" that a volume is xxx MB in size. At the end of that size, it will unload the volume and call for another one. I went thru the 3480 process once, back in 2003 and started using the 3590 drives after that . You're not the only one with 3480 drives, we have them, along with 3420 drives also. I have been successful in taking files on the NFS server and FTPing to a tape drive on VSE. This used the CSI stack and allowed us to use DYNAM tapes. If you can afford to take your Oracle image down, perhaps frequently, or you can afford lots of disk space, you can replace the NFS server with a LVM setup on your Oracle image, just for backups. Having separate images is nice as it allows you to take the non-Oracle images down and make changes. But if you only have a single LPAR for Linux and no VM, you can do everything in one server. I tried attaching the manuals but the listserv rejected their size. So the manuals are: b10735 Oracle Backup and Recovery Basics b10734 Oracle Backup and Recoverey Advanced users Guide Tom Duerbusch THD Consulting >>> David Stuart 4/6/2011 1:12 PM >>> Morning all, New linux admin here. I have an LPAR (yes, an LPAR, no z/VM) running SLES 11 SP1 and Oracle 10g r2. I have yet to back that up. I know, shame on me! Preferably to tape. I have been looking and have found posts referencing mt_st and lintape. So, I am looking for advice on the best way to accomplish the backup. My available tape drives are IBM 3480 (yes, you read that correctly!). They are not directly attached to the Linux LPAR, but have to be 'switched' via the HMC. Which isn't a big deal, I am very familiar with doing this. I am looking for advice on which software package(s) I need on SLES 11 SP 1 to be able to detect, and back up to, my 3480's. Total data, right now, would be 10 - 12 GB (the oracle DB has not yet been populated). Also, anything special I need to do to have the SLES 11 detect that the tape drives are now there? And to 'detach' them when the backup is complete? Anyone know if Oracle can 'back up' to these drives? Or do I need to have Oracle back up to disk first, and then back that data up to the 3480? I'm having trouble finding this info int he Oracle manuals. And if Oracle backs up to disk, such as an lvm, can I back that up directly, or is there something else I need to do, first. Inquiring minds want to know, now that I have time to 'play' with this system some more. TIA, Dave Dave Stuart Prin. Info. Systems Support Analyst County of Ventura, CA 805-662-6731 david.stu...@ventura.org -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/ -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linu
Re: Backing up SLES 11 SP1 and Oracle
Can you define a NFS server on the same imageyour can... You can define a lot of things on the same image...but... Linux memory management isn't as strong as VM, VSE or MVS...so one application can cause real problems for others. But it is doable. No, I didn't define a NFS server on the same image. You can define a second LVM on the same image. In this case, the first LVM is for Oracle (if you don't need top performance, LVM for Oracle tablespaces reduces management quite a bit) and the second LVM for Oracle backups. In my case, I defined the LVM on a NFS server, and then mounted space on the NFS on the Oracle image. How did I use z/VSE to backup it up? Wellat first, I cheated. I ran a small tape job on VSE to create the dataset (open, write, close) for Dynam file VT.TAR.3420.ARCH I then varied off the drive and varied it on the Linux LPAR. Here are my notes on what I did then: SUSE 11 Tar Tape Processing *** must install mt_st RPM to use hardware compression on the IBM 3590 drives. *** provides mtst support vary on 5b1 (vary it off on the 390 side first) attach 5b1 linux72 Logon as: root lstape FICON/ESCON tapes (found 1): TapeNo BusID CuType/Model DevType/Model BlkSize State Op MedState N/A 0.0.05b1 3590/50 3590/11 N/A OFFLINE --- N/A SCSI tape devices (found 0): Generic DeviceTarget Vendor ModelType State chccwdev -e 0.0.05b1 Setting device 0.0.05b1 online Done lstape FICON/ESCON tapes (found 1): TapeNo BusID CuType/Model DevType/Model BlkSize State Op MedState 0 0.0.05b1 3590/50 3590/11 autoUNUSED --- LOADED SCSI tape devices (found 0): Generic DeviceTarget Vendor ModelType State dir /sys/class/tape390 total 0 lrwxrwxrwx 1 root root 0 Jan 19 16:18 ntibm0 -> ../../devices/css0/0.0.0014/0.0.05b1/tape390/ntibm0 lrwxrwxrwx 1 root root 0 Jan 19 16:18 rtibm0 -> ../../devices/css0/0.0.0014/0.0.05b1/tape390/rtibm0 mtst -f /dev/ntibm0 rewind mtst -f /dev/ntibm0 fsf 1 mtst -f /dev/ntibm0 compression 1 tar -b 64 -v -pcf /dev/ntibm0 *.3420 (produce tar file on tape) -b 64 (block at 64 512 byte blocks i.e. 32k) -v show files as they are being processed -p -c -f file to send tar to (/dev/ntibm0) mtst -f /dev/ntibm0 eof 2 mtst -f /dev/ntibm0 rewind mtst -f /dev/ntibm0 fsf 1 tar -b 64 -tvf /dev/ntibm0 (list tar contents from tape tar -b 64 -xf /dev/ntibm0 204344.3420 (retrieve single file to current directory) All 3420 tapes takes about 14GB With hardware compression, that is about 25% of the tape used. (don’t need to gzip…hardware compression) Yea, Yea, Yea...I know.I'm using root. Bad...booohiss. As far as doing it without cheating. I got half way thru. You know that with the CSI stack, you can ftp to/from a tape. Good to have it mounted first else the FTP will timeout. I have sent a tar file, as binary to the tape drive. Then I had to work on production stuff and haven't got back to it. What still needs to be done: I need to ftp get the tar from the tape to another filename. Do a tar to list the contents of the tarfile (validate nothing got changed during transmission). Perhaps extact the files, to another directory and compare the results to the original directory. Tom Duerbusch THD Consulting >>> David Stuart 4/6/2011 3:49 PM >>> Thanks Tom, So, you defined the NFS Server on the same Linux image as the DB? And I was wondering how you used your z/VSE System to back it up... Thanks for the ideas. Dave Dave Stuart Prin. Info. Systems Support Analyst County of Ventura, CA 805-662-6731 david.stu...@ventura.org>>> "Tom Duerbusch" 4/6/2011 1:37 PM >>> Weekly, we take a backup for disaster recovery. Take the image down. Flashcopy the disks (or backup from z/OS or z/VSE, as you don't have z/VM) Bring image up. For the logical backups. I defined an NFS server which the Linux image mounts. Nightly, I take an Oracle Backup Using OEM: Maintenance tab Backup/Recovery Schedule Backup (I make it reoccurring at 3 AM). I tell it to use a directory on the mounted NFS space. Then, during the day, when we have an Operator present. Then move a 3590 drive over to the IFL. >From another Linux image (but could be your Oracle image also) They sign on using PUTTY, and do a "tar" to the tape drive. The problem you are going to have with 3480 drives, is "tar" isn't too friendly with multiple volsers. If you ever hit end of volume with "tar", it will cancel. However, you can tell "tar" that a volume is xxx MB in size. At the end of that size, it will unload the volume and call for another one. I went thru the 3480 process once, back in 2003 and started using the 3590 drives after that . You're not the only one
Re: Backing up SLES 11 SP1 and Oracle
Weekly, we take a backup for disaster recovery. Take the image down. Flashcopy the disks (or backup from z/OS or z/VSE, as you don't have z/VM) Bring image up. For the logical backups. I defined an NFS server which the Linux image mounts. Nightly, I take an Oracle Backup Using OEM: Maintenance tab Backup/Recovery Schedule Backup (I make it reoccurring at 3 AM). I tell it to use a directory on the mounted NFS space. Then, during the day, when we have an Operator present. Then move a 3590 drive over to the IFL. >From another Linux image (but could be your Oracle image also) They sign on using PUTTY, and do a "tar" to the tape drive. The problem you are going to have with 3480 drives, is "tar" isn't too friendly with multiple volsers. If you ever hit end of volume with "tar", it will cancel. However, you can tell "tar" that a volume is xxx MB in size. At the end of that size, it will unload the volume and call for another one. I went thru the 3480 process once, back in 2003 and started using the 3590 drives after that . You're not the only one with 3480 drives, we have them, along with 3420 drives also. I have been successful in taking files on the NFS server and FTPing to a tape drive on VSE. This used the CSI stack and allowed us to use DYNAM tapes. If you can afford to take your Oracle image down, perhaps frequently, or you can afford lots of disk space, you can replace the NFS server with a LVM setup on your Oracle image, just for backups. Having separate images is nice as it allows you to take the non-Oracle images down and make changes. But if you only have a single LPAR for Linux and no VM, you can do everything in one server. I tried attaching the manuals but the listserv rejected their size. So the manuals are: b10735 Oracle Backup and Recovery Basics b10734 Oracle Backup and Recoverey Advanced users Guide Tom Duerbusch THD Consulting >>> David Stuart 4/6/2011 1:12 PM >>> Morning all, New linux admin here. I have an LPAR (yes, an LPAR, no z/VM) running SLES 11 SP1 and Oracle 10g r2. I have yet to back that up. I know, shame on me! Preferably to tape. I have been looking and have found posts referencing mt_st and lintape. So, I am looking for advice on the best way to accomplish the backup. My available tape drives are IBM 3480 (yes, you read that correctly!). They are not directly attached to the Linux LPAR, but have to be 'switched' via the HMC. Which isn't a big deal, I am very familiar with doing this. I am looking for advice on which software package(s) I need on SLES 11 SP 1 to be able to detect, and back up to, my 3480's. Total data, right now, would be 10 - 12 GB (the oracle DB has not yet been populated). Also, anything special I need to do to have the SLES 11 detect that the tape drives are now there? And to 'detach' them when the backup is complete? Anyone know if Oracle can 'back up' to these drives? Or do I need to have Oracle back up to disk first, and then back that data up to the 3480? I'm having trouble finding this info int he Oracle manuals. And if Oracle backs up to disk, such as an lvm, can I back that up directly, or is there something else I need to do, first. Inquiring minds want to know, now that I have time to 'play' with this system some more. TIA, Dave Dave Stuart Prin. Info. Systems Support Analyst County of Ventura, CA 805-662-6731 david.stu...@ventura.org -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/ -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/
Re: Security question about having zLinux web servers out in DMZ.
Not a valid restriction. Open Systems and Network types only run a single stack in a box (vast majority of the time). Here, they still can't grasp that I have some 70 stacks running on a single box. (but there is only 2 ethernet cables...so you can't have 70 stacks) >From their viewpoint, treat each stack as a standalone box when dealing with >them. Just like standalone boxes, if you have one stack routing to another >stack, it is the same as one box being routed to another box. If some stacks need to be passed thru the DMZ to the outside world, just identify the IP addresses envolved. Tom Duerbusch THD Consulting >>> Ron Foster at Baldor-IS 3/30/2011 10:56 AM >>> Hello listers, Our company has recently been acquired by another company. We are at the point of having to get our two networks to talk to each other. Before we can do that, we have to comply with certain security rules. One of them being that the mainframe cannot be exposed to the internet. We have a couple of zLinux web servers that are running in a couple of z/VM guests that are connected to our DMZ. The new folks say this is a show stopper as far as hooking up the two networks. The questions I have are: Is this a common restriction? That is, you have to have your DMZ based web servers running on some other platform so that your mainframe is not exposed to the internet. Or, the new folks just don't understand the built-in security provided by the z10 and z\VM 6.1. I know that we will end up conforming to the rules that the new folks have, but I was just wondering if the new folks really know what they are talking about. Thanks, Ron -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/ -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/
Re: Moving Oracle off zLinux boxes -- comments from the field?
I have Oracle 10g R 2 running on zLinux. I really haven't had many problems with it. But I always wondered Is there an application related reason that they need the latest, greatest release of Oracle, some new bell or whistle or were they just reading the latest trade rag? My gut says that the Open Systems types always needs the latest software in order to support the latest hardware, which changes frequently. Just how often are there mainframe hardware changes made that an application, or middleware is aware of? Hipersockets? Dataspaces? 64 bit addressing? Anything else? Here, I can't get anyone interested in new releases. They are very happy as is. About 5 years ago or so, I think it was Oracle that stated that not every release will be available for the mainframe. However, they will support the mainframe releases longer than they normally do to keep in line with the mainframe methods. Not that I was watching, but I didn't hear about loads of mainframes replacing DB2/UDB 9.5 with DB2/UDB 9.7. At some point, I expect to have Oracle 11 up and running. It would be concurrent with 10 g, most likely for years. Easy with zLinux. Sometimes that can be a bad thing also . Tom Duerbusch THD Consulting (of course I still have some SLES7 images running) >>> "Simms, Michael" 3/23/2011 11:09 AM >>> I suspect, I'm unfortunately not a fly on the wall, that Oracle simply wants to sell their newly acquired hardware 'division', Sun. But that is only speculation. This almost looks like a strong shove away from the hardware they can't handle, apparently. I can just see Jack Nickelson screaming to Larry, 'You can't handle the mainframe!!' (except for zO$, I guess it's $upported.) Unfortunately, the application we bought must use Oracle, at least that's my understanding. So that kind of messes with using DB2 as a replacement. The application we are gearing up will be very heavily used, 60+ sites, all with very frequent updates. So, we need the power of the mainframe IFLs and i/o system. But if Oracle doesn't get their support/certification in gear we may have to consider something less than what we were expecting and it would be similar to what is happening in James shop. We'll cross that road when we get to it. -Original Message- From: Linux on 390 Port on behalf of Christopher Cox Sent: Wed 3/23/2011 11:11 AM To: LINUX-390@VM.MARIST.EDU Subject: Re: Moving Oracle off zLinux boxes -- comments from the field? Oracle is NOT supporting them well on zLinux. So... there's both the financial and technical reason. Why would anyone stay with a platform that is not well supported? Oracle couldn't handle it, so they are moving. Now... certainly the "false mindset" issue surrounding mainframes is an issue... but I'd probably move Oracle too if they weren't willing to address support issues in a timely manner. Maybe it's time to change your database supplier?? You know, if if you have to move it, I wonder if moving to something a bit more heavy duty, like a IBM Power7 box was even considered... If DB2 isn't an option, maybe Oracle on Power7 would be a better fit (saying without knowledge of Oracle's commitment of support there as well). From: Barton Robinson To: LINUX-390@vm.marist.edu Date: 03/18/2011 04:04 PM Subject:Re: Moving Oracle off zLinux boxes -- comments from the field? Sent by:Linux on 390 Port wow, your DBAs have the authority to spend that kind of money and make that kind of change without management signature? So no financial analysis, no technical reason, sounds religious. CHAPLIN, JAMES (CTR) wrote: > We just had a surprise announcement by one of the Oracle DBAs during a > zLinux & Application group planning meeting at our worksite. The DBA > advised us that they (Database group) were going to move/migrate all the > Oracle databases that we have on zLinux boxes off to an intel/unix > platform. He did not offer details of the hardware, or when or how, just > that they were going to do it. This is a bite of a surprise as we have > just moved our MQ off the Mainframe (zOS) to the zLinux platform (guests > on zVM) and that move is doing well. This may be due in part to the > false mindset that we have in our upper management at our site that > Mainframes are old technology. Also we have had slow response from > Oracle on resolving issues we have identify (certifying Oracle 11 on > z390x architecture, getting Oracle 10 support for RHEL 5.0 on z390x > architecture). Has anyone else on this list had any related "war > stories" similar to what we may be about to experience as this move > takes place? > > > > James Chaplin > > Systems Programmer, MVS, zVM & zLinux > > -
Re: Where is kernel loaded in memory?
Is it possible to trigger a bogus transaction say, an hour before your first transaction is usually executed? We had a similar problem with CICS back in the '90s. The transaction did a call (a no no back in CICS 1.7) to an external routine which did a lot of paging and a lot of I/O to non-cached controllers. The first time thru, the transaction would abend (AICA...runaway task timer). After storage was loaded, it would run in a few seconds. The cheapest/easiest solution was to trigger the transaction a couple times before users got on. Is that possible with your application? Tom Duerbusch THD Consulting >>> Mark Wheeler 3/17/2011 11:55 AM >>> Bob, No, the question was asked previously, but I chose to ignore it. For one, because it would take way too long to explain adequately, and also that the thread would quickly expand exponentially. Quick answer: we have an app that sees elongated response times on the first transaction of the day. We have traced it back to several thousand synchronous pageins (because stuff got paged out overnight, and our page volumes aren't infinitely fast). All subsequent transactions run sub-second. I have no idea which pages are involved, but it was suggested that since they were synchronous pageins, it may involve the kernel. A POSSIBLE solution that crossed my mind would be to lock kernel pages in storage and see if that solved the problem. All I needed to conduct that little experiment was to know where the kernel lived in storage. Again, I know most everyone who reads this will have the same obvious questions and suggestions, and I appreciate that. Alas, right now there isn't enough time or bandwidth to explain the situation in sufficient detail so as to prevent this thread from blowing up in a hundred different directions. The suggestion to look at /proc/iomem answered my immediate question. As necessary, I'll toss further questions out to the list. Thanks all! Mark Wheeler UnitedHealth Group > Date: Thu, 17 Mar 2011 11:30:27 -0600 > From: nix.rob...@mayo.edu > Subject: Re: Where is kernel loaded in memory? > To: LINUX-390@VM.MARIST.EDU > > An obvious question that no one has bothered to ask as yet: > > What is the problem you're trying to solve with this? Or, why do you want to > know where the kernel loads, and what will you gain from it? > > Too many times, users or other people (programmers, other sysadmins, ...) > come to us with a solution in need of a piece or part, and we never hear the > larger question or problem, to which there may be a much simpler answer. > > The query may be a simple one, the need may be educational. Or it may be a > cog in a larger, complex solution to a problem that some, or many of us have > already solved in some other way which does not involve walking through the > kernel's memory. > > It's just a thought, but Mark -- What's your original problem or task? > > -- > Robert P. Nix Mayo Foundation .~. > RO-OC-1-18 200 First Street SW /V\ > 507-284-0844 Rochester, MN 55905 /( )\ > - ^^-^^ > "In theory, theory and practice are the same, but > in practice, theory and practice are different." > > > > On 3/17/11 5:59 AM, "Richard Troth" wrote: > > > Originally, the kernel loaded at "real" addr 64k. That is the default for > > Linux on most platforms. But you could change that, and for 1M alignment, > > some do so on S/390. > > > > Going with mapped memory, it sounds like absolute zero is the virtual pref > > for kernel space. Cool. Easily handled in all virt mem platforms. > > > > -- R; <>< > > -- > For LINUX-390 subscribe / signoff / archive access instructions, > send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit > http://www.marist.edu/htbin/wlvindex?LINUX-390 > -- > For more information on Linux on System z, visit > http://wiki.linuxvm.org/ -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/ -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/
Re: Db2 Connect Server
In my case (VSE), the mainframe documentation is in the PD for DB2/VSE. Tom Duerbusch THD Consulting Sent via BlackBerry by AT&T -Original Message- From: "Dazzo, Matt" Sender: Linux on 390 Port Date: Tue, 1 Mar 2011 10:41:34 To: Reply-To: Linux on 390 Port Subject: Re: Db2 Connect Server Tom, I have DB2 Conn Server installed, I reviewed the post installation steps etc. Where are the next steps documented about configuring connections to say db2 instances on the MF? Checked the Db2 info center and but can't find where that stuff is? Kind of like where do I go next? Tks Matt -Original Message- From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of Tom Duerbusch Sent: Monday, February 28, 2011 1:51 PM To: LINUX-390@VM.MARIST.EDU Subject: Re: Db2 Connect Server When I installed DB2 Connect, I used the VNC method of installing. I did a "find / -name db2samp*.* from putty on my DB2 Connect Server. The file wasn't found. I don't know what was used by the install process. BTW, if you only have DB2 Connect and not DB2/UDB with it, would you still have a sample DB to install? I'm thinking that the sample DB is for DB2/UDB type testing and if you are not licensed for DB2/UDB, could you still create it and what could it be used for? Tom Duerbusch THD Consulting >>> "Dazzo, Matt" 2/28/2011 9:59 AM >>> I'm a zvm/Linux nubie looking for some help with DB2 Conn sever on Linux. I have it installed and I am working on the post installation tasks, trying to create the sample database but it seems the command 'db2sampl' is nowhere to be found. According to the not so good db2 install book it should be in / $HOME/sqllib/bin but it's not there. I searched the entire db2 install path and there is no db2sampl. Has anyone else run into this? The db2val tool run successfully and I can start the db manager. Matt Dazzo Sr. MVS Systems Admin Publishers Clearing House 516-944-4816 mda...@pch.com -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/ -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/ -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/
Re: Db2 Connect Server
When I installed DB2 Connect, I used the VNC method of installing. I did a "find / -name db2samp*.* from putty on my DB2 Connect Server. The file wasn't found. I don't know what was used by the install process. BTW, if you only have DB2 Connect and not DB2/UDB with it, would you still have a sample DB to install? I'm thinking that the sample DB is for DB2/UDB type testing and if you are not licensed for DB2/UDB, could you still create it and what could it be used for? Tom Duerbusch THD Consulting >>> "Dazzo, Matt" 2/28/2011 9:59 AM >>> I'm a zvm/Linux nubie looking for some help with DB2 Conn sever on Linux. I have it installed and I am working on the post installation tasks, trying to create the sample database but it seems the command 'db2sampl' is nowhere to be found. According to the not so good db2 install book it should be in / $HOME/sqllib/bin but it's not there. I searched the entire db2 install path and there is no db2sampl. Has anyone else run into this? The db2val tool run successfully and I can start the db manager. Matt Dazzo Sr. MVS Systems Admin Publishers Clearing House 516-944-4816 mda...@pch.com -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/ -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/
Re: Gotcha's
To some extent these may or may not be "gotcha's". Background. IBM z/890 with 1 IFL with FICON attached dasd. IFL has 4 GB memory. Running Oracle 10g with OEM. Also a variety of NFS servers, FTP servers, Samba servers, VSE Virtual Tape servers, DB2/UDB test machines, Web servers, DB2 Connect servers and some basic Linux machines. Most of the servers are underutilized/idle. We have 4 Oracle servers, a production one, a test one (same as production with data refreshed from production), development one (table definitions may change compared to the production one) and my DBA one (where I test things out before I impact the other images). Based on the documentation from Oracle, in my case of Suse 10 SP 2 with Oracle 10g R2, there may be some RPMs that are needed and changes to some parms (such as sysctl.conf, Limits.conf, login, profile.local) are needed. It is much easier if your first Oracle installs mirror the IBM Redbooks. Of course that won't be the latest Oracle, nor the latest Linux, but then you see the process and the result. If you train by using the latest Linux with the latest Oracle, you will have months of fun . The production server has 300 users defined, and normally 95 active during 1st shift. The database size is 7 GB. The production database normally runs 20-25% of the z/890 IFL. OEM (Oracle Enterprise Manager). Like most products, it doesn't understand virtualization. The maximum CPU line on its graphs are bogus. At times, when some batch type process is running, it show we are using 3.5 to 4 CPUs. Instance disk I/Os shows past 40,000 per second vs my monitor shows perhaps 500 per second. I use the graphs to give me a relative idea of what is happening. When another machine drives the IFL to 100%, OEM shows we are having problems. However, with the CP share of 1000 vs 100 for others, there is no real contention and users don't have any complaints. Ooops. Almost forgot. I trade memory savings for a higher I/O rate. This image is 750 MB. (The other Oracle images are 600 MB). To get the image size down that small, I had to make the SGA size about the smallest it can be (with OEM running) of 200MB, (140 MB on the other images). The gotcha, is when you install Oracle, I think it required a 1 GB machine to install, it started to set memory parms. You have to go back and adjust them for your size. And then I had to change the PGA size also. If you really need performance, then the trade is you loose easy administration. RAW file access against native dasd spread across controllers. Pain if you need more space. I didn't need that type of performance so my tablespaces are in a LVM pool. Need more space, add a pack to the LVM pool. No changes to Oracle. Oracle assumes that you are on crap hardware. It wants to put copies of its log files on separate disks. I had a small fight with it about that. We didn't have FCP tape drives attached, so I do two types of backups. 1. I cycle Oracle and do a flash copy each week. I DDR the images to escon 3590s for disaster backups. 2. A copy of Oracle is exported and the logs are copied to an NFS server. The files on the NFS server are tar'ed and put on a 3590 tape. (I can reload via tar any/all files back to the NFS server.) The documentation, even when discussing zSeries processors, have requirements that are PC in nature. i.e. cheap CPU, cheap memory, crap I/O. However, if you are seriously going to drive a couple IFL engines, they are good starting points. Of course, not having a good VM performance monitor is a serious gotcha if you are doing heavy loads or where performance is critical. We had a developer issue a query from hell which tied up the server for hours, but Oracle continued to service the other queries in a timely fashion. Not hard when you are only using 25% of the processor, normally. You might need a startup/shutdown script to activate/deactivate lsnrctl, the database, and dbconsole. That's all I can thing of for now. We have been running for 4 years now. No failures. No problems. No maintenance added. Just runs. But then, never had a disaster recovery attempt. Never had to reload a single table from backup. I have restored the database from backup but didn't need to roll forward. Tom Duerbusch THD Consulting >>> "Davey, Clair" 2/15/2011 10:25 AM >>> I would like to hear some of your 'gotcha's when running Oracle databases on Linux on Zeries. You can send them offline if you would like. The contents of this e-mail are confidential to the ordinary user of the e-mail address to which it was addressed and may also be privileged. If you are not the addressee of this e-mail you should not copy, forward, disclose or otherwise use it or any part of it in any form whatsoever. If you have received this e-mail in error, please notify us by telephone or e-mai
Re: SUSE 11 SP 1, Oracle 10g Install - Network Config Assistant Fails
FYI I installed Oracle 10g R2 on Suse 10 with a 1GB virtual sized machine. I did that with all 4 of my Oracle machines. I don't think that Suse 11 would take more storage. On my installs, there were some Oracle patches that needed to be applied. And one had to be applied during the Oracle install. This was at a point where the Oracle install failed, applied the patch, and restart the Oracle install at that point. Did you have to do the same thing under Suse 11? Tom Duerbusch THD Consulting >>> David Stuart 2/4/2011 3:14 PM >>> Mark, That will take an 'outage', as I'm running in an LPAR (yeah, I know!), and I may have to POR after adjusting memory for that LPAR. I don't remember, right now. Dave Dave Stuart Prin. Info. Systems Support Analyst County of Ventura, CA 805-662-6731 david.stu...@ventura.org>>> "Mark Post" 2/4/2011 1:11 PM >>> >>> On 2/4/2011 at 04:01 PM, David Stuart wrote: > It's running with 1GB. Just to get through the install I would try more, say 1.5 or 2G. Mark Post -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/ -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/ -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/
OT: Fedora 14 for IBM System z 64bit official release
This leads me to a question that I'm mildly interested in. If it took so long for Fedora to have a 64 bit favor, why would anyone use it? Is there a different market for Fedora on the mainframe than for Redhat or Suse? What does Fedora do that can't be done with Redhat or Suse which gets timely upgrades? Back in the Suse 7/8 time frame, Redhat seemed to be skipping support for every other release of Oracle. I don't recall if they skipped support for every release of other products as well. That made my decision very easy. I'm going with the distribution that offers consistent and timely support. So, why would anyone use a distribution that is years behind in support? Inquiring minds want to know... Tom Duerbusch THD Consulting >>> Neale Ferguson 1/25/2011 8:27 PM >>> You are correct. 1G allows the VNC method to be used and all the customization that comes with it. Tks On 1/25/11 8:08 PM, "Karsten Hopp" wrote: This looks like you're doing a text installation where you have only a limited set of configuration options. If you didn't have to select between text and VNC install methods you'll need to assign more memory for this guest and try again, I was doing my test installs with 1G. That's only required for the installation, the memory requirements of the installed system can be much smaller, depending on what you intend to use it for. -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/ -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/
Re: mt_st and 3590 compression
Thanks Mark The documentation showed that the mt_st RPM needed to be installed. But their examples continued to use the mt command. Oh well. That is solved and documented. Thanks Tom Duerbusch THD Consulting >>> Mark Post 1/21/2011 12:37 PM >>> >>> On 1/21/2011 at 01:26 PM, Tom Duerbusch wrote: > I'm doing something wrongimagine that...but what? # rpm -qlp mt_st-0.9b-97.1.50.s390x.rpm | grep bin/ /usr/bin/mtst /usr/sbin/stinit It seems the command is actually mtst, not mt. Mark Post -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/ -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/
mt_st and 3590 compression
I asked this back in 2009 and the response was to install the mt_st RPM. The problem was, how to enable 3590 tape hardware compression from Linux. Now, I'm on SUSE 11 SP 1 for this run. Well, I install the mt_st RPM. When I try to do: linux72:/VSEVTAPE/archive # mt -f /dev/ntibm0 compression mt: invalid argument `compression' for `tape operation' The current Device Drivers, Features, and Commands on SUSE Linux Enterprise Server 11 SP1 manual only says to install the mt_st RPM. It doesn't say I have to do anything else. I tried setting the device offline and then online. mt still failed. linux72:/VSEVTAPE/archive # mt -V mt (GNU cpio 2.9) This result is the same as before I installed the RPM. Shouldn't the version be something else? When I go back into Yast, it does show the mp_st package is installed. I'm doing something wrongimagine that...but what? Thanks Tom Duerbusch THD Consulting -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/
Re: Advice on setting up minidisks
At first, when Mark suggested only -9 and -27 disks, I disagreed with him. After a day, I started agreeing with him. Now I'm back to disagreeing with him. I guess it all depends First, you have to go back to hardware. You can only create 256 drives out of any RAID array. On the DS6800/DS8100, if you are using 72 GB drives, if you only define mod-3s, you can't use all the space available. And this gets worse as you go to the 145 GB drives, the 300 GB drives, the 500 GB drives and the 1 TB drives. You just have to have some/many large 3390s in order to use all the space. Mark is pretty much correct, that 3 3390-3 vs 1 3390-9 are the same. If they are on the same raid array there isn't much performance improvement unless you consider that you can only do 1 I/O per device at the same time, unless you use PAV (and paid for that feature). Consider that a mod-27 will be only on a single RAID array. Divide it into 3 3390-9 and you can put each one on a different array. Now you can truely do multiple I/Os at the same time. In my case, I do have some larger Linux guests, but I do have a bunch of small ones. Really they could be on a 3390-1, but, eventually, some of them, due to software installs, tend to grow and I need more space. Their data, however, I either have as LVM (yep, larger capacity drives work well here), or NFS mounted space. So my root drive is usually a 3390-3. HOME and other data directories are on LVM or NFS space. For example, my Oracle servers use LVM for local Oracle tablespace. However, it backs up to a NFS server. That NFS server is an easy place for me to backup all the data from multiple machines to tape. The Oracle server is physically backed up weekly with FlashCopy and that flashed image is then backed up to tape as a physical image. This is used for disaster recovery purposes. My point is that small drives have their purpose. But I also would tie together a dozen mod-3 drives if I had the option to tie together a lessor amount of mod-9 drives (or higher capacity). If you need I/O performance, make sure you spread your data across several arrays. This may require you to do smaller drives. I can sure tell the difference when I copy a GB file when from/to are on the same array vs from/to being on different arrays. BTW, I'm not sure why someone would do this, but you can create mod-10, mod-11 mod-xx drives in the IBM Dasd Subsystems. Any size is really available. But you may face issues of "standards". Just another opinion Tom Duerbusch THD Consulting >>> Ron Foster at Baldor-IS 1/13/2011 1:41 PM >>> Hello list, This may have been discussed before... Way back in deep dark ancient history, we used the Redbook to get started with Linux under z/VM. As a result, we carved up our storage subsystem in to a bunch of mod3 drives. We put a few mod 9 drives in the mix. We added drives to a guest in standard chunks. That is when storage was needed by a Linux system, we added a mod9 or mod3 to it. When that Shark went off lease and we moved to a DS8000, we pretty well kept the same philosophy. Only we added a bunch more mod3 and mod 9 drives. We are a SAP shop and any large databases reside in DB2 on z/OS. There are a few large file systems on 3 or 4 of our Linux systems, but for the most part the drives attached to a Linux system go something like this. A boot drive. One to several mod3 drives for swapping (the appropriate ones have vdisks). One to several mod3 or mod9 drives for the SAP code and local files. We are moving our production drives. We finally have gotten our production Linux systems where about half or do very little swapping. We do not have dirmaint, so we keep up with disk allocations with dirmaint and a spreadsheet. Now time has come to migrate to another storage system. I was wondering what other folks do. 1. Do they have a whole bunch of mod9 and mod3 drives that they allocate to their guests? 2. Do they take mod27 drives (someone at SHARE warned me about taking mod54 drives) and use mdisk to carve them up into something smaller. Any input would be appreciated. Thanks, Ron Foster -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/ -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/
Re: How many virtual servers per IFL?
I will shot gun some of them... 1. Disaster recover is much easier on the mainframe. In effect, no matter what hardware is replaced with what hardware, it is all the same. With PC type servers, the hardware, hence the software drivers are constantly changing. This may force you to reinstall the software instead of just restoring. 2. Our I/O subsystem. Mainframes with ficon/FCP, can drive (per IBM documentation) drive hundreds of thousands of I/Os per second. If you only need a few hundred I/Os per second, well, that is within PC ranges. 3. Licensing is a two edge sword. Putting 5 copies of Oracle on an IFL...you only pay for one copy. However, if you have many, one copy products, you end up needing more engines on the IFL, which (if you get charged by the engine), causes those product charges to increase. 4. Disk is disk. It costs the same whether your DS8100/DS6800 is configured for CKD or SCSI disk. 5. Mainframe memory is more expensive, but it is more effectively used. When an application states that it needs 4 GB to run, I start around 500 MB and increase it when needed. 6. When a server application needs more resources, many times you have to go out and buy a newer, bigger server. When a mainframe server needs more resources, you may have options to rob other servers. Also for larger shops, Capacity on Demand. 7. Green. There is an application on z10s and above, that will show you your footprint and the incremental footprint for additional loads. I seem to recall something about you can plug in data from servers you are migrating from, to show the incremental decrease in the footprint of the datacenter. There hasn't been much chatter about this on the listservs so I don't know how well this has been received. 8. Internal network speed. If a function requires the use of several servers and they are network attached, things are slowed up by the network. No such problem with Hypersockets or Guest Lans/VSWITCH (under VM) and can have large packets also. 9. We don't, but we should have performance tools. You buy one for the LPAR and you know what is going on. Rather than buy one per server. You still might need specialized performance tools on some servers. Oracle OEM to measure internal Oracle performance, for example. 10. The serious problem with PC servers is context switching. There a dog. Mainframes are great at this, as CICS transactions really drive this. If your load tends towards transactional instead of batch (data mining), PC type servers were not designed for this. I assume that RS6000 and Sun type servers are pretty good at context switching, but I have no direct knowledge of this. Back when Linux started hitting mainframes and IFLs were announced, there was discussions of 100 images per engine. A lot of the servers at that time were routers, DNS, Samba, NFS and some web. Now I seem to here 10-20 real workloads per engine. BTW, there was/is an MES upgrade from one box to another. In the case of the MES upgrade from a z/890 (our box) to a z10 (hopefully/maybe ours), the license for the IFLs transfers. Which means that we would not have to pay for the Linux side again. And the new IFLs are faster per engine than the older IFLs. That is no longer a cost on the mainframe that you still have on the other server platforms. Know that I think of it, I may be thinking of the MES upgrade that pulled cards (and you license and CPUID) from one box and installed it on the newer box. I'm now thinking that the IFL engine transfer will happen with any upgrade to a new box. I've been looking at the MES upgrade option for so long, that I have MES on the mind . Tom Duerbusch THD Consulting >>> John Cousins 12/6/2010 11:07 AM >>> Here we go again! Without success, we've been trying to get the IT department here to adopt z/Linux since 2003! Our zVM licence has been recently cancelled, and I have just had a request from our Enterprise Architects for some costing for z/Linux as they need to compare server virtualisation costs with VMware! One problem of trying to get a cost per virtual server was always trying to estimate how many servers an IFL will support. We had a 13 SuSe servers defined in a z800 IFL but as they were hardly used we couldn't measure a thing! So are there any rules of thumb out there on how many production virtual servers would run on a Z10 IFL? Obviously it will depend on server utilisation, guess that will need to be estimated as well? Another question is where do the bulk of the savings come from? From my investigations over the years other success stories suggest most savings come from software licensing, e.g Oracle, Tivoli etc. but also from networking infra-structure by the use of virtual switches. Are there any other areas that provide benefits? Any ideas or constructive suggestions would be gratefully
Re: Memory Allocation
It really depends on how easy/hard is it, in your shop to change the size of the LPAR. When it is easy, then I make the memory allocation fairly small, say 2 GB and grow it when it is proved that I need more memory. However, I wouldn't ever try Websphere with anything under 4 GB. This is under the theory that the first application takes all the memory it can and will leave nothing for the next application. I have a 4 GB LPAR for z/VM 5.2 and Linux machines. What I currently have running: I have 18 Linux images running 1 production Oracle 1 test Oracle 1 development Oracle 1 DB2 Connect production 1 DB2 Connect test 4 Samba servers (SLES 8) 2 NFS servers 2 FTP servers (that have the iso images of Linux and Oracle mounted for installation purposes) 3 VSE Virtual Tape servers 2 Samba Servers (SLES 11) that will be migrating to once testing is completed (these will also take over the VSE LANRES disk hosting function we are currently using) None of these are heavy hitters. Production Oracle has 200 users defined and 40 currently logged on. DB2 Connect production has 22 clients at this time. The VM system only pages when an image is bought up. All the linux images use vdisk for swap space. The production DB2 Connect image: Defined as 250 MB virtual. Defined on a single 3390-9. Has been running for 162 days; linux69:~ # swapon -s FilenameTypeSizeUsedPriority /dev/dasdb1 partition 162468 271250 /dev/dasdc1 partition 81228 45224 60 Most of the swap space used was from me going into Yast. And as VMSTAT shows, we are not actively swapping: linux69:~ # vmstat 10 10 procs ---memory-- ---swap-- -io -system-- -cpu-- r b swpd free buff cache si sobibo in cs us sy id wa st 1 0 47936 7680 22460 12444000 21510 4 1 94 0 1 0 0 47936 7560 22468 12443200 014 2631 165 4 1 70 0 25 0 0 47936 7560 22476 12442400 0 3 3130 179 4 1 80 0 15 0 0 47936 8092 22432 12446800 018 351 213 4 1 95 0 0 0 0 47936 8032 22448 12445200 014 328 203 3 1 95 0 0 0 0 47936 8032 22456 1200 012 5486 188 0 1 99 0 0 0 0 47936 8032 22472 12442800 026 6104 189 4 1 89 0 6 0 0 47936 8032 22496 12440400 014 6267 189 4 1 88 0 7 0 0 47936 7972 22520 12438000 014 4529 194 4 1 86 0 9 0 0 47936 7972 22536 12436400 012 996 202 4 1 95 0 1 So, your initial plans for a z/VM plus a single DB2 Connect Server could be run in a LPAR of 512 MB. However, since SUSE (with OSA connections) seems to want about 750 MB for installation, that would cause a lot of paging when you do a Linux install. On a MP3000 with 1 GB and 9 VSE systems the 750 install requirement did cause a lot of paging but everything still ran fairly well. My current processor is a z/890 with a ficon attached DS6800. So, yes, I do trade the very cheap ficon I/Os for the more expensive memory. If we were driving the DS6800 harder, then I would add more real memory to the mix to drive down the I/O rate (paging/swaping reduction along with more memory for caching). So the question goes back toWhat else are you planning (or playing) for in the future and how often can you reconfigure the LPAR to add more memory? Tom Duerbusch THD Consulting >>> "Dazzo, Matt" 12/2/2010 8:45 AM >>> We are entering the world of zvm/linux with a z10bc-2098 n04 and 16gb total memory. I am trying to decided what to allocate to zvm/linux as a starting point. Our initial thoughts and a recommendation from our VAR was 6gb. The first application will be DB2 Conn Server and not sure what's after that. I'd like to find out how much memory other shops have allocated and what applications they support. Is our initial 6gb a decent starting point? I know the IBM standard answer 'it depends' but I am looking for some clarity and guide lines. Thanks Matt -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/ -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---
Re: Reducing Linux virtual machine size
Hi Ray.
I tried your script on some of my images. Works fine, except when Oracle is
involved.
linux62:~ # ps -eo pmem | awk '{pmem += $1};END {print "pmem ="pmem"%"}';
pmem =1347.1%
I do have a lot of swap blocks allocated. This is due to a batch type run,
that is run off hours. During the day, when users are on, we swap very little.
So if this does include swap pages, I don't think the script would give me what
I need, during normal processing. Do you agree? Or am off track here?
Thanks
Tom Duerbusch
THD Consulting
>>> "Mrohs, Ray" 7/23/2010 1:45 PM >>>
Start up all your Linux procs and then run this little script.
#! /bin/sh
ps -eo pmem | awk '{pmem += $1}; END {print "pmem = "pmem"%"}';
It will give you a ballpark percentage of current memory utilization.
I tuned some Apache/ftp servers down to 100M with no ill effects.
Ray Mrohs
U.S. Department of Justice
202-307-6896
> -Original Message-
> From: Linux on 390 Port [mailto:linux-...@vm.marist.edu] On
> Behalf Of Bruce Furber
> Sent: Friday, July 23, 2010 11:01 AM
> To: LINUX-390@VM.MARIST.EDU
> Subject: Reducing Linux virtual machine size
>
> Can someone recommend a how to procedure for monitoring a
> zLinux machine to determine how much to reduce a machines
> virtual memory?
>
> Getting permission to schedule time to log a machines off is
> very difficult so I have to be confident I have it right.
>
> --
> For LINUX-390 subscribe / signoff / archive access instructions,
> send email to lists...@vm.marist.edu with the message: INFO
> LINUX-390 or visit
> http://www.marist.edu/htbin/wlvindex?LINUX-390
> --
> For more information on Linux on System z, visit
> http://wiki.linuxvm.org/
>
--
For LINUX-390 subscribe / signoff / archive access instructions,
send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit
http://www.marist.edu/htbin/wlvindex?LINUX-390
--
For more information on Linux on System z, visit
http://wiki.linuxvm.org/
--
For LINUX-390 subscribe / signoff / archive access instructions,
send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit
http://www.marist.edu/htbin/wlvindex?LINUX-390
--
For more information on Linux on System z, visit
http://wiki.linuxvm.org/
Re: Strange problems adding network adapter no 2 (eth1) in SLES11 SP1
When the thoughts went to a firewall problem, I don't recall that YaSTfirewall2 is enabled by default in SLES 11 SP1 was discussed. I think only networking firewalls have been discussed. That caught me yesterday. Try YaSTfirewall2 status to see if it is running. YaSTfirewall2 stop to stop it. Then test again. Tom Duerbusch THD Consulting Sent via BlackBerry by AT&T -Original Message- From: Alan Altmark Sender: Linux on 390 Port Date: Thu, 15 Jul 2010 08:34:38 To: Reply-To: Linux on 390 Port Subject: Re: Strange problems adding network adapter no 2 (eth1) in SLES11 SP1 On Thursday, 07/15/2010 at 04:18 EDT, Agblad Tore wrote: > I checked 'routes', only one row, and now I also have moved the SLES11 SP1 > machine into the same > subnet where the SLES10 SP2 is ( that works fine with three NICs, all possible > to login via) > And no change. On a VSWITCH there is no point in having more than one virtual NIC on the same subnet (LAN segment). All you're doing is creating more work for Linux. Get rid of eth1 and eth2. I mean, it's not like you can have an isolated vNIC failure or accidentally unplug it! Alan Altmark z/VM Development IBM Endicott -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/
Re: SLES 11 SP 1 Bogus swap disk
I would agree that it wasn't a big deal to change, once I figured out what was
happening.
I would like to suggest, one of those great "notes" in the Deployment guide.
They are real eye catchers when you print out the manual. For me, just another
thing I skip over when I view online (I'm showing my age now).
Perhaps page 109 under 6.13.1 Partitioning (Overview).
Something to let z/Linux users know about this change and how to bypass it.
I assume that this also occurs with LPAR installs.
With LPAR installs, we don't get to change the storage size, quickly. In my
experience, the LPAR is created with the resources that it would need in
production.
Sooo
Would a 2 GB LPAR, create a disk based swap file of 1 GB off of my (in this
case) 3390-3 disk? Not much space left to install Linux..
The novice installer that you are trying to help, then either needs to:
1. Get a bigger disk.
2. Get another disk and move some mount points to that disk.
3. Trim the number of packages or patterns to reduce the dasd requirements.
That would sure give the novice installer some experience!
FYI
Once I recovered all my disk and tried the default set of packages, I was still
some 60 MB short. I deleted several patterns, only keeping:
Base System
32 bit runtime
Help and Support
Minimal System
(yast did inform me that some packages were needed and would be installed
either way).
I have room so I can install other packages when necessary. i.e. when I find
out that something I wanted, wasn't installed. (ooops, my bad)
It may be a bad habit of mine, as I try to do the initial install on a single
pack as other packs, defined later, will just be part of a large LVM.
The following is a snip of my installation instructions concerning fixing the
bogus swap disk:
select dasda1 (swap)
| delete
| Yes (really delete)
| select dasda1 (ext3)
| delete
| Yes (really delete)
| select dasda (note this is not dasda1)
| add
| New Partition Size
| Max
| next
Format Partition
File System: Ext3
Mount partition
Mount point: /
Finish
Select dasdb1
edit
Format Partition
File System: Swap
Mount partition
Mount Point: Swap
Fstab Options:
Device Path
Swap Priority:
50
OK
Finish
Select dasdc1
edit
Format Partition
File System: Swap
Mount partition
Mount Point: Swap
Fstab Options:
Device Path
Swap Priority:
60
OK
Finish
Accept
Tom Duerbusch
THD Consulting
--
For LINUX-390 subscribe / signoff / archive access instructions,
send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit
http://www.marist.edu/htbin/wlvindex?LINUX-390
--
For more information on Linux on System z, visit
http://wiki.linuxvm.org/
SLES 11 SP 1 Bogus swap disk
I'm installing SLES 11 SP 1 under z/VM 5.2 on an IBM z/890. During the installation process, a swap disk is created on my dasda drive automatically by the install process. I have my own swap disks (vdisks) allocated and I don't want/need this swap disk. I can go into partitioning during the install and delete this swap disk (created as dasda1 with my linux system on dasda2). That does get rid of the swap disk and the linux system would then be moved to dasda1. OK. However, and here is the complaint. I still lost the disk space on dasda that was allocated to the bogus swap disk on dasda1. In other words the disk that I will install on, which is now dasda1, starts on cylinder 307. And the starting location isn't constant. If you install under different virtual storage sizes, the swap disk allocated is 1/2 of the virtual storage size. Note: with def stor 512m │Partitioning ┬│ ││ ││ ││ * Create swap partition /dev/dasda1 (247.50 MB) ││ ││ * Create root partition /dev/dasda2 (2.05 GB) with ext3 ││ ││ * Use /dev/dasdb1 as swap ┴│ ││ * Use /dev/dasdc1 as swap ││ ││ with def stor 768m Partitioning ┬│ ││ ││ ││ * Create swap partition /dev/dasda1 (372.66 MB) ││ ││ * Create root partition /dev/dasda2 (1.93 GB) with ext3 ││ ││ * Use /dev/dasdb1 as swap ┴│ ││ * Use /dev/dasdc1 as swap To get my disk space back, I have to delete all the partitions for dasda and add in the dasda1 partition. So, I have a way around it. But it looks like some PC type default snuck in to create this swap disk. I have my workaround, but it shouldn't be needed in the first place . Tom Duerbusch THD Consulting -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/
Re: SUSE 11 SP 1...where?
Thanks Time to stop banging my head into the wall Tom Duerbusch >>> Mike Friesenegger 5/24/2010 4:18 PM >>> Hello Tom, SLES11 SP1 will be publicly available on June 2nd - http://www.novell.com/news/press/novell-announces-suse-linux-enterprise-11-service-pack-1/ Mike >>> On 5/24/2010 at 03:03 PM, in message <4bfaa33f028000004...@mail.stlouiscity.com>, Tom Duerbusch wrote: > Dumb question... > > Where is SUSE 11 SP 1? > > When I go to the Novell download site, I see SUSE 11. > http://download.novell.com/index.jsp?product_id=&search=Search&families=2658&ve > > rsion=8162&date_range=&date_start=24+May+2010&date_end=24+May+2010&keywords=&sort_ > by=&results_per_page=&x=35&y=5 > > When I go to the patch database, I see patches for SUSE 11 but not a set of > patches for SUSE 11 SP 1. > http://download.novell.com/patch/psdb/ > > Perhaps, SP 1 is only available thru YaST automatic patch update? > > I don't have SUSE 11 installed. So I was planning on either installing SUSE > 11 SP 1, or SUSE 11 with the SP 1 iso file mounted. > > Thanks > > Tom Duerbusch > THD Consulting > > -- > For LINUX-390 subscribe / signoff / archive access instructions, > send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or > visit > http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
SUSE 11 SP 1...where?
Dumb question... Where is SUSE 11 SP 1? When I go to the Novell download site, I see SUSE 11. http://download.novell.com/index.jsp?product_id=&search=Search&families=2658&version=8162&date_range=&date_start=24+May+2010&date_end=24+May+2010&keywords=&sort_by=&results_per_page=&x=35&y=5 When I go to the patch database, I see patches for SUSE 11 but not a set of patches for SUSE 11 SP 1. http://download.novell.com/patch/psdb/ Perhaps, SP 1 is only available thru YaST automatic patch update? I don't have SUSE 11 installed. So I was planning on either installing SUSE 11 SP 1, or SUSE 11 with the SP 1 iso file mounted. Thanks Tom Duerbusch THD Consulting -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Announcing Red Hat Enterprise Linux 6 beta
Where I did initially like IUCV and VCTCA, both methods are Point to Point on an IP network. (it seemed simplier) It violates all the standard networking laws. Every time I showed our IP setup to the network people, they were just confused and I didn't know why. But in z/VM 5.2, support was dropped for IUCV and VCTCA on an IP network. When I migrated over to z/VM 5.2, I had lots of VSE and Linux images that had to be converted. But first, I had to learn real IP networking (subnets, broadcast address, router address, etc). I also converted over to VSWITCH which made life soo much easier. Tom Duerbusch THD Consulting >>> Mark Post 4/26/2010 3:54 PM >>> >>> On 4/26/2010 at 04:46 PM, Xose Vazquez Perez >>> wrote: > On 04/26/2010 10:32 PM, Mark Post wrote: > >>>>> On 4/26/2010 at 04:19 PM, Michael MacIsaac wrote: >>> Ouch! We use IUCV all the time. Is there any reason for this? >> >> For the installation process? > > SuSE is not too far: > http://en.opensuse.org/Linuxrc#Special_parameters_for_S.2F390_and_zSeries Yes. So? Who is using this stuff for installation these days (except perhaps on Hercules)? If someone is, on real System z hardware, they're being overly masochistic to say the least. Don't do that. Mark Post -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: SLES10 - Oracle/Memory Issues (oom-killer)
My first guess, is that you are out of swap space. Now why, is a different story. So, either increase the guest machine size for Oracle (do a "q v stor" first to see if what you think it should be, is actually what it is ), or add more swap space. I think there are some conditions where insufficient virtual memory can also lead to OOM. Something that needs lots of memory, and can't tolerate it being swapped. In that case, increase the guest machine size. Sometimes, I've cause that type of problem, by editing a large log file. Editors like "joe", puts everything in memory. Got a 500 MB log file? No problemuntil you run out of swap space. Tom Duerbusch THD Consulting Also running with Oracle 10g R2 (4 copies) >>> "Rodery, Floyd A Mr CIV US DISA CDB12" >>> 12/30/2009 4:48 PM >>> We've noticed some repetitive error messages in regards to a memory issue on one of our SLES 10 SP2. We notice the error below every morning around the same time, with multiple oom-kills of oracle, perl, etc. Anyone have any thoughts as to why this might be happening with the amount of memory this guest has? If you have any thoughts or need anymore information, I would certainly appreciate it. #MEMINFO (For a reference) MemTotal: 5138052 kB MemFree:144308 kB Buffers:121768 kB Cached:3717360 kB SwapCached: 46352 kB Active:2849880 kB Inactive: 1590368 kB HighTotal: 0 kB HighFree:0 kB LowTotal: 5138052 kB LowFree:144308 kB SwapTotal: 2352736 kB SwapFree: 2116048 kB Dirty: 376 kB Writeback: 0 kB AnonPages: 584892 kB Mapped:2159592 kB Slab: 172056 kB CommitLimit: 4921760 kB Committed_AS: 5506584 kB PageTables: 334304 kB VmallocTotal: 4289716224 kB VmallocUsed: 5024 kB VmallocChunk: 4289711032 kB HugePages_Total: 0 HugePages_Free: 0 HugePages_Rsvd: 0 Hugepagesize: 2048 kB #ERROR MESSAGE (excerpt from /var/log/warn, this error is repeated over and over, killing several different processes within a couple minutes) Dec 27 04:37:33 *SERVER NAME* kernel: oracle invoked oom-killer: gfp_mask=0x201d2, order=0, oomkilladj=0 Dec 27 04:37:34 *SERVER NAME* kernel: ccd13918 c54c2cf1 8142d938 0061a350 Dec 27 04:37:34 *SERVER NAME* kernel:61104620 00105b52 Dec 27 04:37:34 *SERVER NAME* kernel: 006009c0 0418 Dec 27 04:37:34 *SERVER NAME* kernel:0001 0008 000e ccd139c0 Dec 27 04:37:34 *SERVER NAME* kernel:004ad158 00105b52 ccd13948 ccd13988 Dec 27 04:37:34 *SERVER NAME* kernel: Call Trace: Dec 27 04:37:34 *SERVER NAME* kernel: ([<00105b6e>] dump_stack+0x2aa/0x364) Dec 27 04:37:34 *SERVER NAME* kernel: [<001c3994>] out_of_memory+0x3b8/0x934 Dec 27 04:37:34 *SERVER NAME* kernel: [<001c7216>] __alloc_pages+0x29a/0x370 Dec 27 04:37:34 *SERVER NAME* kernel: [<001ce582>] do_page_cache_readahead+0x156/0x3a8 Dec 27 04:37:34 *SERVER NAME* kernel: [<001bd55c>] filemap_nopage+0x210/0xa4c Dec 27 04:37:34 *SERVER NAME* kernel: [<001e18be>] __handle_mm_fault+0x282/0x114c Dec 27 04:37:34 *SERVER NAME* kernel: [<00102080>] do_dat_exception+0x584/0x858 Dec 27 04:37:34 *SERVER NAME* kernel: [<00115d16>] sysc_return+0x0/0x10 Dec 27 04:37:34 *SERVER NAME* kernel: [<8061041c>] 0x8061041c Dec 27 04:37:34 *SERVER NAME* kernel: Dec 27 04:37:34 *SERVER NAME* kernel: Mem-info: Dec 27 04:37:34 *SERVER NAME* kernel: DMA per-cpu: Dec 27 04:37:34 *SERVER NAME* kernel: CPU0: Hot: hi: 186, btch: 31 usd: 159 Cold: hi: 62, btch: 15 usd: 58 Dec 27 04:37:34 *SERVER NAME* kernel: CPU1: Hot: hi: 186, btch: 31 usd: 156 Cold: hi: 62, btch: 15 usd: 27 Dec 27 04:37:34 *SERVER NAME* kernel: Normal per-cpu: Dec 27 04:37:34 *SERVER NAME* kernel: CPU0: Hot: hi: 186, btch: 31 usd: 151 Cold: hi: 62, btch: 15 usd: 56 Dec 27 04:37:34 *SERVER NAME* kernel: CPU1: Hot: hi: 186, btch: 31 usd: 165 Cold: hi: 62, btch: 15 usd: 14 Dec 27 04:37:34 *SERVER NAME* kernel: Free pages: 21488kB (0kB HighMem) Dec 27 04:37:34 *SERVER NAME* kernel: Active:832717 inactive:260329 dirty:0 writeback:0 unstable:0 free:5372 slab:14827 mapped:650 pagetables:14672 2 Dec 27 04:37:34 *SERVER NAME* kernel: DMA free:16016kB min:3660kB low:4572kB high:5488kB active:807232kB inactive:896400kB present:2097152kB pages_ scanned:3937815 all_unreclaimable? yes Dec 27 04:37:34 *SERVER NAME* kernel: lowmem_reserve[]: 0 0 3072 3072 Dec 27 04:37:34 *SERVER NAME* kernel: Normal free:5472kB min:5492kB low:6864kB high:8236kB a
Re: Getting Started with zLinux
Since you are a newbie I don't think anyone mentioned this but there are IBM Redbooks that walk you thru the installation process, in mainframe language I use the SUSE flavor and the manuals helped a lot. I assume that there are Redhat Redbooks available. Others hopefully will chime in on those. The trail you are on, has already been blazeded. There are maps (Redbooks) and becoming a well traveled highway. In other words, if you think you are blazing a trail, it is time to step back and think about it. The Redbooks pretty much map the common things out. That includes the major interface (Something like Putty), into Linux. When we need to use the VNC Server... But bringing up the KDE desktopWell, if you want to play solitaire Tom Duerbusch THD Consulting >>> John McKown 11/30/2009 5:36 AM >>> That really helped me! And it also helped with z/OS UNIX as well. On Sun, 2009-11-29 at 20:14 -0500, Mike Myers wrote: > Scott: > > I suppose you're right. I am a Linux newbie and am trying to accelerate > my learning experience. -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Has anyone looked into a "console server"
Yep, I use the PROP method also. I have PROP log to a SFS directory, so I don't have to reaccess the minidisk when viewing the file. Then I have an exec "HCF" which browses the console file (without locking it), also with a xedit profile to specify the columns I wish to view (on my MOD 5 session). And then various xedit macros to view all messages from a machine, or refresh the screen every 5 seconds, etc. It use to be tied into PROP issuing commands back to the Linux guest. Things such as shutting down an application and the OS and forcing it off, but since SIGNAL seems to work fine, that code hasn't been maintained. A program product for VM console management is much better, at a cost. But I get by with a home grown ugly piece of code. Tom Duerbusch THD Consulting >>> Michael MacIsaac 9/30/2009 9:05 AM >>> Hello list, Has anyone ever tried to log the 3270 Linux consoles to a central server? I see on http://freshmeat.net/projects/conserver/ "Conserver provides remote access to serial port consoles and logs all data to a central host." It would be nice to rarely need 3270 sessions, but also to be able to get to any Linux's console logs and search for specific error messages. I'm hoping someone has already blazed this trail. Thanks. "Mike MacIsaac"(845) 433-7061 -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Moving a Samba directory
Thanks Aria SMBSTATUS is a good thing to know. I'm not worried about syncing files using RSYNC as the only time this Samba server is updated is during 1st shiftwell, so far. I will be doing the expansion during the 3td shift. Tom Duerbusch THD Consulting >>> Aria Bamdad 9/11/2009 8:12 AM >>> When you cycle the samba server, all connection to the shares will be broken but the clients reconnect when they see this happen. At least for windows clients, this should be transparent unless someone tries to access your server in the exact time you are restarting it. Before you restart your server, you can issue a SMBSTATUS command to see if there are any open files or not. You will see client connections to shares but you want to watch out for open files. If you recycle the server while files are open, those application with open files will get upset. You can minimize your samba outage to seconds by using the RSYNC command I pointed out in an earlier post just before you shutdown your samba server and immediately after you shutdown the server and before you start it again in its new home. Depending on the size of your file system, this could be just seconds. I am not sure how much shorter you can make this outage. Aria > -Original Message- > From: Linux on 390 Port [mailto:linux-...@vm.marist.edu] On Behalf Of > Tom Duerbusch > Sent: Wednesday, September 09, 2009 4:39 PM > To: LINUX-390@VM.MARIST.EDU > Subject: Re: Moving a Samba directory > > Like I said, I knew the answer to this one (i.e. shutdown Samba), but I > hoping for a quick and dirty way, of doing the conversion with Samba > still up. > > Well, once this is done, I can then add disks to the LVM on the fly. > Just hate to have to do the scheduling of downtime (users and servers) > when I know no one is going to be active anyway, just their shares are > in use. > > Right? When I cycle the server, the users have to reaccess their > shares? It's the servers that are accessing the Samba shares, then > also have to be cycledand those users have to be notified... > > Thanks > > Tom Duerbusch > THD Consulting > > >>> Justin Payne 9/9/2009 2:41 PM >>> > If you do not stop the samba service you run a risk of files being > accessed during the move, and this could lead to corruption of the new > files. As recommended before, you should be able to copy the bulk of > the > data without shutting down the service. With the bulk of the data > mirrored on the new LVM, the second rsync will be quite quick at > syncing > only the changes so downtime will be minimal. > > It would be best to plan a brief outage of the samba service to > complete > the task you have outlined. > > Justin Payne > > On 09/09/2009 12:53 PM, Tom Duerbusch wrote: > > I think I know the answer to this one, but then, I don't know how > much I don't know. > > > > I have a Samba server that runs 24X7. It is rarely used at night, > but still has Windows shares active. > > The /home directory is located off the / directory (dasda1). It > needs more space. > > I've created a LVM with a directory name of /home2. > > I plan on copying the /home directory to /home2, rename /home to > /homeold, and rename /home2 to /home. > > Simple. > > > > What is Samba going to think about this? > > Do I need to cycle Samba, and have all the currently connected users, > reconnect? > > Or as long as Samba isn't trying to access a file during this period > of time, would it care? > > > > Part of this is trying to decide how much notification I have to give > the end users, and there are a couple "servers" that also have Samba > shares. I don't know how to reconnect them, other than cycling those > servers, which, then requires additional notification. > > > > On my test system, I moved the Samba /home directory to a LVM setup. > No problem. But I didn't have any currently accessed shares at that > time (poor test plan). > > > > Thanks for any input and direction. > > > > Tom Duerbusch > > THD Consulting > > > > - > - > > For LINUX-390 subscribe / signoff / archive access instructions, > > send email to lists...@vm.marist.edu with the message: INFO LINUX-390 > or visit > > http://www.marist.edu/htbin/wlvindex?LINUX-390 > > > > -- > For LINUX-390 subscribe / signoff / archive access instructions, > send email to lists...@vm.marist.edu with the message: INFO LINUX-390 > or visit > http://www.marist.edu/htbin/wlvindex?LINUX-390 > &
Re: Moving a Samba directory
Thanks Mark I can slip this thru and cycle the Samba server, during a known time period where no one is actively accessing Samba files. Thanks Tom Duerbusch THD Consulting >>> Mark Post 9/9/2009 6:14 PM >>> >>> On 9/9/2009 at 4:38 PM, Tom Duerbusch wrote: -snip- > Right? When I cycle the server, the users have to reaccess their shares? I doubt it. The Windows clients won't know that Samba has been cycled, so they will just try to re-establish the connection the next time the user tries to use it. It will likely be fairly transparent to them. Mark Post -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Moving a Samba directory
Like I said, I knew the answer to this one (i.e. shutdown Samba), but I hoping for a quick and dirty way, of doing the conversion with Samba still up. Well, once this is done, I can then add disks to the LVM on the fly. Just hate to have to do the scheduling of downtime (users and servers) when I know no one is going to be active anyway, just their shares are in use. Right? When I cycle the server, the users have to reaccess their shares? It's the servers that are accessing the Samba shares, then also have to be cycledand those users have to be notified... Thanks Tom Duerbusch THD Consulting >>> Justin Payne 9/9/2009 2:41 PM >>> If you do not stop the samba service you run a risk of files being accessed during the move, and this could lead to corruption of the new files. As recommended before, you should be able to copy the bulk of the data without shutting down the service. With the bulk of the data mirrored on the new LVM, the second rsync will be quite quick at syncing only the changes so downtime will be minimal. It would be best to plan a brief outage of the samba service to complete the task you have outlined. Justin Payne On 09/09/2009 12:53 PM, Tom Duerbusch wrote: > I think I know the answer to this one, but then, I don't know how much I > don't know. > > I have a Samba server that runs 24X7. It is rarely used at night, but still > has Windows shares active. > The /home directory is located off the / directory (dasda1). It needs more > space. > I've created a LVM with a directory name of /home2. > I plan on copying the /home directory to /home2, rename /home to /homeold, > and rename /home2 to /home. > Simple. > > What is Samba going to think about this? > Do I need to cycle Samba, and have all the currently connected users, > reconnect? > Or as long as Samba isn't trying to access a file during this period of time, > would it care? > > Part of this is trying to decide how much notification I have to give the end > users, and there are a couple "servers" that also have Samba shares. I don't > know how to reconnect them, other than cycling those servers, which, then > requires additional notification. > > On my test system, I moved the Samba /home directory to a LVM setup. No > problem. But I didn't have any currently accessed shares at that time (poor > test plan). > > Thanks for any input and direction. > > Tom Duerbusch > THD Consulting > > -- > For LINUX-390 subscribe / signoff / archive access instructions, > send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit > http://www.marist.edu/htbin/wlvindex?LINUX-390 > -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Moving a Samba directory
I think I know the answer to this one, but then, I don't know how much I don't know . I have a Samba server that runs 24X7. It is rarely used at night, but still has Windows shares active. The /home directory is located off the / directory (dasda1). It needs more space. I've created a LVM with a directory name of /home2. I plan on copying the /home directory to /home2, rename /home to /homeold, and rename /home2 to /home. Simple. What is Samba going to think about this? Do I need to cycle Samba, and have all the currently connected users, reconnect? Or as long as Samba isn't trying to access a file during this period of time, would it care? Part of this is trying to decide how much notification I have to give the end users, and there are a couple "servers" that also have Samba shares. I don't know how to reconnect them, other than cycling those servers, which, then requires additional notification. On my test system, I moved the Samba /home directory to a LVM setup. No problem. But I didn't have any currently accessed shares at that time (poor test plan). Thanks for any input and direction. Tom Duerbusch THD Consulting -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Unable to logon to Linux under VM
You have Oracle running. Look in the recent archives for "Module is unknown when signing on". Tom Duerbusch THD Consulting >>> Vincent Getgood 6/23/2009 9:03 AM >>> Hi all, I'm having problems logging on to my SLES 10 system. I originally had this system running as a LPAR some months ago, before installing VM. I have now defined a VM Guest (LINUX00), attached the DASD I had for the LPAR to the guest, and successfully IPL'd SLES 10. On the Linux guest console, I see: - Welcome to SUSE Linux Enterprise Server 10 SP2 (s390x) - Kernel 2.6.16.60-0.21-default (ttyS0). SUZE-Linux-on-Z login: When I try to logon, (as any defined user) I get the following: - Last login: date time on ttyS0 Module is unknown Then get thrown back to the logon prompt. Any idea what is happening here? Vince Getgood -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: shutdown/reboot question
If you don't have some sort of automation package or console package. Create a CMS user with a profile exec that does: signal shutdown guestname sleep 10 minutes force guestname immed sleep 10 secs xautolog guestname And give him the autolog rights to that machine. He doesn't need to know the password for this machine (which has CP authorization to do lots of bad things...) If you are not on VM, there may be times when the zLinux system crashes, that you have to have Operations boot the LPAR. Tom Duerbusch THD Consulting >>> Sue Sivets 6/17/2009 2:31 PM >>> Is there any way to give a user the ability to shutdown and reboot a Suse z/linux system without giving him the root password? In simple terms, one of my users is asking for the root password so he can reboot the machine when he needs to because the project he's working on has crashed and generally caused a lot of problems. I found a couple of notes from 2007 that were about a shutdown userid on a Redhat system. Will something like that work on a Suse10 system, or is there a better way of accomplishing what I need? If it will work, can someone tell me what I need to do in order to make it work? I was thinking about using SU, but as far as I know, he would still need the root password, and then I'm back where I started. Is there a way to give him some kind of alternate root password that doesn't open up the whole ball of wax? If anyone has any other ideas, I would really like to hear them. I really don't want to give out the root password if I can avoid it. Thank you Sue -- Suzanne Sivets Systems Programmer Innovation Data Processing 275 Paterson Ave Little Falls, NJ 07424-1658 973-890-7300 Fax 973-890-7147 ssiv...@fdrinnovation.com -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: LCS problem Installing SLES 11 in "partition" ( more)
How big is the guest machine size? On SLES10, I need 768 MB to load the ram disk with an OSA connection. OSA, from what I remember, needs 32 MB, just for buffers. I don't recall if that was for each connection or for each of the tripplet addresses. But it was a lot more than I had when I moved from VCTCA to VSWITCH. Tom Duerbusch THD Consulting >>> Mike At HammockTree 6/17/2009 1:17 PM >>> Since I dndn't get much response form my initial query yesterday, I thought I'd include a little more information this time. I'll paste in the log that I captured when trying to install SLES 11 into a partition. I tried both OSA2/LCS and CTCI. Note that the install program found both devices correctly at 0400 and 0600, but when I actually tried to use them, I got errors. I tried the OSA2/LCS first, then the CTCI. Any suggestions? Thanks, Mike == log begins > Start Installation 1) Start Installation or Update 2) Boot Installed System 3) Start Rescue System > 1 Choose the source medium. 1) DVD / CD-ROM 2) Network 3) Hard Disk > 2 Choose the network protocol. 1) FTP 2) HTTP 3) NFS 4) SMB / CIFS (Windows Share) 5) TFTP > 3 Detecting and loading network drivers ccwgroup: disagrees about version of symbol struct_module Choose the network device. 1) IBM parallel CTC Adapter (0.0.0600) 2) IBM OSA2 Adapter (0.0.0400) > 2 Try OSA2 / LCS Please choose the physical medium. 1) Ethernet 2) Token Ring > 1 ccwgroup: disagrees about version of symbol struct_module *** failed to load lcs module *** No network device found. Load a network module first. *** No repository found. Choose the network protocol. 1) FTP 2) HTTP 3) NFS 4) SMB / CIFS (Windows Share) 5) TFTP 3 Choose the network device. 1) IBM parallel CTC Adapter (0.0.0600) 2) IBM OSA2 Adapter (0.0.0400) > 2 * Try CTCI ** ccwgroup: disagrees about version of symbol struct_module *** failed to load ctcm module *** No network device found. Load a network module first. *** No repository found. Choose the network protocol. 1) FTP 2) HTTP 3) NFS 4) SMB / CIFS (Windows Share) 5) TFTP -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Oracle Enterprise Manager
OEM does a lot of stuff, including recording information in tables, for historical purposes. I've seen these "idle" systems use lots of CPU. Especially, when they do their cleanup and automatic tuning. If you want to see the difference, go input putty with userid Oracle (or any authorized user for Oracle) and... emctl stop dbconsole this will shutdown EOM Monitor the guest with your favorite performance product. emctl start dbconsole will start up OEM again. On lightly used systems, OEM is the major user of system resources. If this is a real concern in your shop, perhaps shutting it down on test systems or when testing isn't being done, may be right for you. A lot of OEM code is JAVA. Tom Duerbusch THD Consulting (running with 4 Oracle 10g R2 images) >>> "Kern, Thomas" 6/17/2009 12:25 PM >>> Our DBA has just installed the Oracle Enterprise Manager 10.2.0.5 on a test server (SLES9 SP3) on our z/VM 5.3 machine (z890 IFL). This morning I noticed that from midnight to 11:00 that test server used about 6 times the CPU seconds as an idle production server. PerfTK shows that SVM using about 3.5% over an hour interval while idle Oracle SVMs use less than 1% CPU. OEM reports that the agent in the server uses at most 1.5% CPU. It does cause the database to perform other performance analysis tasks. Is it reasonable for a Management agent to use 1.5% (or more) of the system CPU in each server? Has anyone in the VM/Linux community validated/invalidated the CPU utilization reports from this product? -- Thomas Kern 301-903-2211 (Office) 301-905-6427 (Mobile) -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: DB2 Connect and Linux on Z
I don't think UDB uses zIIP engines. They use IFL engines. Performance seems to be good, especially over hipersockets. Tom Duerbusch --Original Message-- From: David Boyes Sender: Linux on 390 Port To: LINUX-390@VM.MARIST.EDU ReplyTo: Linux on 390 Port Subject: Re: DB2 Connect and Linux on Z Sent: Jun 10, 2009 12:25 PM > We are new to the Linux world and have been developing Linux servers on > our Z9. We are thinking of setting up a DB2 Connect Linux on a Z server > with Hypersocket connection to out DB2 database which is on one of our > zOS lpars. Does anyone know if the performance is going to be > compatible to the DB2 Connect running on a solaris server where the > connection is Ziip eligible. I have been told that if the DB2 connect > runs through Hypersockets it is no longer Ziip elegible. Forgive me if > I seen to not be making sense. I'm not sure I understand the question. ZIIPs serve only workload actually performed on z/OS, AFAIK (although I have some ideas about how to change that...). The only part of a transaction involving a non-z/OS client that would ever be ZIIP-eligible is the actual lookup/marshalling of the data done inside DB/2 on z/OS. If I understand what you're asking, then the two systems (Solaris and Linux on Z) attempting to execute the same query via DB2 Connect against a zOS DB2 server would receive exactly the same treatment; there's nothing special about Solaris vs Linux clients in this scenario. That would apply to any network-based client, whether using hipersockets or any other transport. Workload running directly on z/OS accessing z/OS DB2 would benefit more from the ZIIP because the DB2 and z/OS code knows it's there and can exploit it more effectively. Am I totally misunderstanding you? -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 Sent via BlackBerry by AT&T
Re: DB2 on z/VM & SuSE 10.2 "box" sizing - starter values ?
We are going into production, tomorrow, with DB2 Connect Server V9.5 fixpack 2. A Cashier system, with about 8 users. I'm on 160 MB virtual, 1 3390-9 drive, two vdisk swap files (about 10,000 4K swap pages used over 3 weeks). This is on a z/890, with the IFL about 20% busy. And no VM paging. Only problem we have had, and can't seem to shoot, yet, is we are using stored procedures on DB2/VSE. About 1 in 10 transactions, has a 20-30 second startup time. Not the first, not the last. Just blind sided. Every box in the transaction path, was not having a CPU problem, an IO problem or a Paging problem, when we had poor response time. Did you have that, and did you solve it? On the DB2 side, my guess is you have too much virtual storage defined. You should have automatic memory management enabled (by default). So scaling back will also scale back the DB2 cache. Check the hit ratio. But I wouldn't try to keep the hit ratio at the same level as the other platforms. If you are on ficon, you have one hell of a kick ass I/O subsystem. Trade some memory for I/O, within reason. That gives you more memory for more servers, until you hit CPU limitations. BTW, my test UDB servers are 512 MB each. Only 2 3390-9 packs for data. Yep, the first time thru, the application ends up loading DB2 cache, and then the queries fly. Testing doesn't need a lot of cache. I don't have Websphere, so I can't consider it's memory loads. Tom Duerbusch THD Consulting >>> 5/19/2009 11:13 AM >>> I'm finally in the process of firing up some "boxes" under VM to replace some aging AIX critters and I could use some advise as to real memory and swap allocations for these new guys. 1st victim was a DB2 connect enterprise unlimited server - cut it to production 2 weeks ago and everything is good. 246900k of memory and 3G of swap, so far, so good except for a small issue with java versioning v1.5 on new box, v1.3 on oldest client app - but that is a java issue that would show up on any platform with the new version. 2nd victim is a DB2 ESE and WebSphere MQ server - can't even fire up the tools database because the bufferpools don't have enough memory. This is where the advise is needed since the IBM docs don't have a recommended starting point for the z/VM environment ( DB2 9.5 fixpack 3b) and I really don't want to scarf all of the vm resources for this machine when the grand plan ( insert evil laugh here ) is to put as many AIX and intel linux onto this platform (Z) as we can and still maintain decent performance. Current AIX box is a 2-way power3 box with 16G of memory - low utilization in a development environment. 3rd victim is a WebSphere AppServer box - 6-way power4 box with 16G memory. Low to moderate utilization in a development environment with a second instance of WAS for background production use ( the moderate utilization part - when it is active ). Current VM lpar has 2 IFL, 9G cstor, 3G estor, z/VM 5.3 and SuSE 10.2 guests Thanks, Bruce -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
z10 and SLES 8
In one of the Linux session documentation (PDF), it says that for the z10 "System z10 Toleration" for SLES 8NO. Does that mean that you can't run SLES8 on a z10 box? At all? Or that the z10 runs SLES10, for example, better? I have a few SLES8 images, more historic in nature. I wouldn't want to kill them off, but I'm also not sure that it would be worth the effort to migrate them. Not that a z10 is in the near future, but you still have to plan.... Thanks Tom Duerbusch THD Consulting -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: vswitch for everyone
I'm not sure about this, but if you don't care who gets authorization for VSWITCH, then just automate the process for everyone. For example, when ever you update the directory and DIRECTXA it. Have a little REXX program also kick off to scan all "USER " cards, take the second word on that statement and do a GRANT for that user. If you use DIRMAINT, do a "DIRM GET USER DIRECTORY" after updating and execute the same REXX routine. Also, execute the routine as part of AUTOLOG1 to reissue the grants at IPL time. My point is that it is an easy enough workaround. And would be much quicker than getting IBM to channel resources into a request that is needed by few (or 1) licenses. In my case, I do grants for vswitch for 20 machines at a time. Right now, I'm done for LINUX6X and LINUX7X machines. (I'm only up to LINUX69 which is a test DB2 Connect Server Edition machine). But then, I also do the Linux installs, and I'm prompted for vswitch authorization by my documentation. Just like the CREATE DIRECTORY in SFS, the GRANT AUTH in SFS for the install software, updating the user direct, etc. All just a part of the initial machine configuration. I agree that one less step is one less step to forget/mess upbut that's what we get paid for. Tom Duerbusch THD Consulting >>> RPN01 4/21/2009 12:58 PM >>> The problem is that not everyone wants to purchase an external security manager simply to get this feature. We have no need for an ESM, as, if one of our four users get out of line, we can just walk over to their cube and whack them with a board. I'm not buying an ESM to un-secure a single entity in an already closed box. That makes no sense at all. No humans use the box directly, and we grant the vSwitch to just short of every virtual machine that uses the box. To have to go through the grant process, no matter if it is in the CP directory, in System Config, or in Autolog1, for every new machine that gets created, and to open the door for human error by forgetting to grant this resource, which needs to be available for everyone on the system, seems at best to be an oversight on IBM's part. ESMs are not the solution to this problem. Sorry. -- Robert P. Nix Mayo Foundation.~. RO-OE-5-55 200 First Street SW/V\ 507-284-0844 Rochester, MN 55905 /( )\ -^^-^^ "In theory, theory and practice are the same, but in practice, theory and practice are different." On 4/17/09 12:20 AM, "Alan Altmark" wrote: > On Thursday, 04/16/2009 at 04:15 EDT, Marcy Cortes > wrote: > >> Apparently its *someone*'s requirement, but I agree, and optional open >> Vswitch would be handy indeed. > > I should probably get the requirement answered "Available". As Rob > mentioned, your ESM is capable of doing this. With RACF, RALTER VMLAN > SYSTEM.VSWITCH1 UACC(READ). > > I have no plan (or much willingness) to spend money to duplicate in CP > what can be done with an ESM. > > Alan Altmark > z/VM Development > IBM Endicott > > -- > For LINUX-390 subscribe / signoff / archive access instructions, > send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit > http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Oracle Special Interest Group
I don't see much of a difference, that is, other than the wording. >From the Oracle SIG: Oracle on Linux on System z Workshop: In conjunction with the Oracle zSeries SIG 2009 Conference, IBM is hosting a special 'no-charge' workshop for conference attendees who are considering consolidating and moving Oracle DB workloads to a Linux environment using z/VM software and System z hardware technology. This 2.5 day workshop is designed for system administrators, DBA's, and planners considering a move of Oracle to Linux on System z, and offers practical, hands-on experience through a combination of lectures and labs to install and configure SUSE Linux. A hands-on customization of z/VM will be performed to establish an environment for a Linux system. The workshop includes the installation and customization of Oracle 10g, and will include a discussion of performance tooling for Linux and z/VM that can be used to monitor and tune the system environment. >From the IBM Announcement: This 2.5 day class will be of interest to attendees who are considering a move of Oracle to Linux on System z machines. Topics will be presented to familiarize the attendee with System z hardware technologies. Major software components will be showcased through lecture and hands on labs. Attendees will have the opportunity to perform customization activities on key z/VM system files. Linux will be covered through lectures and labs that include the install and customization of a SLES 10 64 bit system. The install and customization of Oracle 10g and the use of DBCA will be highlighted. Performance is always a topic of keen interest. The class will cover performance tools available at the z/VM, Linux and Oracle levels. Recommendations will be presented on maximizing Oracle performance on Linux on System z. Other topics will cover various options available to gather and process performance data. The Class will wrap up with a discussion on tools and services available for sizing workloads being considered, for a move to Linux on System z. Part of this discussion will also encompass server consolidation to System z machines in addition to a discussion on ROI and TCO factors. Both specify: 1. From IBM. 2. No charge. 3. 2.5 days 4. Moving Oracle to Linux on System z machines. 5. Install and configure SUSE Linux. 6. Install and customization of Oracle 10g. 7. Performance tools. Sorry, I don't see the difference. What am I over looking? Tom Duerbusch THD Consulting >>> Barton Robinson 3/31/2009 12:09 PM >>> I think if you look at the agenda of both, there is quite a difference. Tom Duerbusch wrote: > This SIG seems to be the same education available, free, at other > locations also. > > See the announcement at the bottom of this email: > > Tom Duerbusch > THD Consulting > >>>> Barton Robinson 3/30/2009 7:20 > PM >>> > Any one that is interested in running Oracle on "Z", the conference > will > be held in 3 weeks: "http://www.zseriesoraclesig.org/";. > > As part of the very low cost, there are added workshops included in > the > price. If interested in Linux and z/VM Performance as well as Oracle, > this would be a perfect opportunity. > > -- > For LINUX-390 subscribe / signoff / archive access instructions, > send email to lists...@vm.marist.edu with the message: INFO LINUX-390 > or visit > http://www.marist.edu/htbin/wlvindex?LINUX-390 > > == > > > > Announcing > > Customizing Linux and the Mainframe for Oracle DB > Applications > Available in the > > U.S. during Second Quarter 2009 > > > > > > > > > > The Washington Systems Center will offer a new "no-charge" hands-on > workshop in 2Q 2009. > > > Customizing Linux and the Mainframe for Oracle DB Applications > (LXOR6) > >WORKSHOP |REQUESTED LOCATION| SCHEDULED DATE > -+--+- > | | > -+--+- > LXOR6|Chicago
Re: Oracle Special Interest Group
This SIG seems to be the same education available, free, at other locations also. See the announcement at the bottom of this email: Tom Duerbusch THD Consulting >>> Barton Robinson 3/30/2009 7:20 PM >>> Any one that is interested in running Oracle on "Z", the conference will be held in 3 weeks: "http://www.zseriesoraclesig.org/";. As part of the very low cost, there are added workshops included in the price. If interested in Linux and z/VM Performance as well as Oracle, this would be a perfect opportunity. -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 == Announcing Customizing Linux and the Mainframe for Oracle DB Applications Available in the U.S. during Second Quarter 2009 The Washington Systems Center will offer a new "no-charge" hands-on workshop in 2Q 2009. Customizing Linux and the Mainframe for Oracle DB Applications (LXOR6) WORKSHOP |REQUESTED LOCATION| SCHEDULED DATE -+--+- | | -+--+- LXOR6|Chicago |May 5 - 7 -+--+- |New York City |May 19 - 21 -+--+- |Gaithersburg |June 9 - 11 (The course description is located at the end of this announcement and can also be found at the following IBM Field Education website: http://www.ibm.com/servers/eserver/zseries/education/topgun/enrollment This workshop is provided on a "NO FEE" basis. Travel, food and lodging expenses are the responsibility of individuals attending the class. To enroll in workshops follow the steps listed below: 1.Enrollment is By Invitation Only - Only IBM representatives are allowed to enroll their invited customers in this workshop. 2.This is a STANDBY course and as such all students are initially placed in a PENDED status until all steps below have been completed. 3.IBMers are encouraged to attend with their customers and must register using the same procedures. Go to the WEBSITE: http://www.ibm.com/servers/eserver/zseries/education/topgun/enrollment ● Click the radio button for "Wildfire Workshops" ... you automatically move to the next panel: ● Click the radio button for the workshop in which you wish to enroll your customer ... you automatically move to the next panel: ● At the top of the page the sessions will be displayed. Click on the location and date for the workshop of your choice. ● Complete all enrollee information. ● Provide a valid Siebel Opportunity Number...Note: without this information, the student will not be confirmed for attendance. ● Click on the "Submit" button when all information has been provided. 4.Because space is limited, enroll up to two customers per account. 5.Qualified customers will be removed from PENDED status and receive a follow up note that confirms their enrollment. If you have questions, please contact Judith A Ramage (rama...@us.ibm.com) or call 301.240.3966 / TL 372. Workshop Description & Details Course Description This 2.5 day class will be of interest to attendees who are considering a move of Oracle to Linux on System z machines. Topics will be presented to familiarize the attendee with System z hardware technologies. Major software components will be showcased through lecture and hands on labs. Attendees will have the opportunity to perform customization activities on key z/VM system files. Linux will be covered through lectures and labs that include the install and customization of a SLES 10 64 bit system. The install and customization of Oracle 10g and the use of DBCA will be highlighted. Performance is always a topic of keen interest. The class will cover perform
Re: LVM Striping and RAID for performance?
If you really want performance, the LVM should be stripped across RAID Arrays. And make sure you use multiple controllers. (i.e. in the DS6800 there are two controllers, each has half the cache. If you do LVM across both controllers, you have the potential of using all the cache, not just half.). Tom Duerbusch THD Consulting >>> Fred Schmidt 3/27/2009 12:17 AM >>> Would somebody please clarify - is LVM striping still of benefit to performance if your disk is RAID? If so, why? Regards, Fred Schmidt NT Government, Australia -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Old IBM Mainframe - Still Useful?
The electrical bill isn't worth the box. You can buy a used MP3000 with integrated dasd for a few thousand. And it uses way less power. Of course, the licensing issues still remain. Multiprise 3000--Dollars -- 7060-H30$3,800 7060-H50$4,300 7060-H70$7,000 Tom Duerbusch THD Consulting >>> Andrew Wiley 3/22/2009 4:14 PM >>> I'm trying to research the usefulness of an older IBM mainframe in a computer science class. The mainframe in question is an IBM 9672 RB6, which, as I understand it, was first sold in 1998. So it's reasonably old. Would this machine be able to run a few VM's of linux, or is it too old, or would it depend on the specs? I haven't been able to find much information, although I've been googling it for a few days. Sorry if this is a broad question; any help you can offer me would be greatly appreciated. -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Why does one need to mkinitrd/zipl ? (WAS : Broken logical volume group)
I don't believe that there is a performance problem with thousands of volumes that are there. The performance problem is with the thousands of volumes that are not there. In my case, when we brought in an IBM DS6800, I defined to the IOCP, that there were 150 volumes on each of the 8 controllers. However, I only define volumes on the DS6800 when I need them. Some are mod-3s, some are mod-9s, even some 3380s. I'm running VM, so my guests only see the volumes I give the guest machine, but in the native VSE world, when dynamic device sensing came into play, and VSE was in a LPAR, VSE IPLs took forever. Seemed that each, non-existant device, waited for the missing interrupt handler to get tripped, before it would sense the next volume. I seem to recall that this was also a problem in VM. My guess, is that Linux would have the same problem. So you wouldn't want Linux to go out sensing all devices when you are in a LPAR world. Tom Duerbusch THD Consulting >>> Ivan Warren 2/18/2009 2:03 PM >>> Mark Post wrote: > Basically, some historical, performance, and data integrity reasons. > > Ok, I'm starting to get a better picture now (as to the how & why). As I understand it, the bases are : - An LPAR may have thousands of volumes allocated to it, not all of them being for Linux use. - Volumes not intended for linux use may be accidentally stepped on.. - IPL time ensuing from having many thousand devices (Lordy.. Issuing Sense-ID, RDC and read of cyl 0 track 1 - on 1 devices shouldn't take but a couple seconds anyway.. What's wrong here.. all modern OSes do this in a routine manner.. why wouldn't Linux be any different ? (ok.. maybe I should check with the folks in Böblingen) - is taking an inordinate amount of time. Right.. However (you knew that was coming right ?).. And besides the 'historical' portion which is.. well.. historical.. In an LPAR environment where you (may) have thousands of volumes, with maybe a few percent for Linux use (which is probably a bad idea to start with - but I digress).. Why doesn't mkinitrd *ONLY* take care of the IPL volume (or volumes in you're LVM).. - as the initrd was designed - then - depending on what config is on the root fs, enable this or that volume - once control has been passed to the root fs hosted init (and the pivotroot() has been done) ? The list of configured volumes (those that are designated for linux use) are bound to be available on the root fs anyway - so why not do it *then* (and not during the time when the init on the initrd is in control) ? IIRC, /proc has enough control over dasd_eckd (which is the really the one at issue here I think) to ask it to vary online this or that volume *even* after the initialization phase. Then of course, you have the VM environment.. which is going (by design) to be especially designed for your environment.. Adding a volume should only be a matter of adding a minidisk to the user's directory (or maybe a link if the fs is designed to be RO.. through the directory or maybe a CMS profile..).. and modifying the fstab.. Having to alter the initrd seems to me like a unnecessary and superfluous step. What I am saying, is that, eventually, you're going to wind up with people running zipl/mkinitrd no matter what.. but there is *some* (minor) danger to this ! (actually, of course, it's going to be mkinitrd/zipl - in that order.).. if one step succeeds and the next fails - the system can't be booted *AT ALL* (basically - try running mkinitrd without running zipl !).. Not to mention that - if you consider this as a guardrail.. it fails to accomplish its goal once you have everyone routinely doing this (the safety door 'symptom'.. being blocked opened by a sander block because people are tired of swapping their badge to open a door they go through 100 times a day - also look at the infamous Vista UAC :P ).. Again, this is *not*.. (I repeat .. *NOT*) a rant.. just throwing in ideas of how I think things could (or maybe .. should ?) be done - on a mainframe.. with a mainframe population - used to have complete control of their environment (be it the whole thing, an LPAR or a virtual machine) - in a linux environment. And again.. Mark.. Thanks again for being here - and - in this particular case, taking the time to answer my inquiries ! And of course, I'm just waiting to be proven wrong and change my mind about the whole darn thing ! --Ivan -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Module is unknown when signing on
You're rightIt is only on the Oracle machines. And /var/log/messages shows: n[2636]: PAM unable to dlopen(/lib/security/pam_limits.so) n[2636]: PAM [error: /lib/security/pam_limits.so: wrong ELF class: ELFCLASS32] n[2636]: PAM adding faulty module: /lib/security/pam_limits.so n[2636]: Module is unknown And then looking at /etc/pam.d/login: linux63:/etc/pam.d # cat login #%PAM-1.0 auth required pam_securetty.so auth includecommon-auth auth required pam_nologin.so account includecommon-account password includecommon-password session includecommon-session session required pam_lastlog.so nowtmp session required pam_resmgr.so session optional pam_mail.so standard session required /lib/security/pam_limits.so session required pam_limits.so linux63:/etc/pam.d # Anyway, that is what was in the Oracle 10g documentation. Tom Duerbusch THD Consulting >>> Mauro Souza 1/30/2009 2:53 PM >>> I had this issue after tunning a system to install Oracle. I believe it's related to PAM modules. If you're able to logon via SSH, you can get rid of the changes in limits.conf. In /var/log/messages maybe there's some messages telling you what kind of module is missing... Mauro http://mauro.limeiratem.com - registered Linux User: 294521 Scripture is both history, and a love letter from God. On Fri, Jan 30, 2009 at 6:45 PM, Tom Duerbusch wrote: > On some of my images (SLES 10 SP 2), when I try to logon from the console, > I get: > > Last login: Wed Jan 21 16:20:38 CST 2009 from nss-lt-0001.stlouiscity.comon > pts > /0 > You have new mail. > > Module is unknown > > > Welcome to SUSE Linux Enterprise Server 10 SP2 (s390x) - Kernel > 2.6.16.60-0.21-d > efault (ttyS0). > > > linux62 login: > > > The "Module is unknown" seems to be a problem. I immediately get signed > off and I go back to the logon prompt. > > I haven't applied any maintenance other then the SP2. And it doesn't > happen on all images. What could cause that? > > Thanks > > Tom Duerbusch > THD Consulting > > -- > For LINUX-390 subscribe / signoff / archive access instructions, > send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or > visit > http://www.marist.edu/htbin/wlvindex?LINUX-390 > -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Duplicate IP question
Under SLES 10 SP 2, if you bring up an image that has the same IP address as a currently running system, is linux smart enough not to flood the network with packets with duplicate IP addresses? It does figure something out, saying that it can not register the IP address, but does it keep trying and flood the network and/or mess up communications with the box that was running initially? In the old days, when a Windows box came online with a duplicate IP address, the entire network would suffer. What happens in the Linux world? Thanks Tom Duerbusch THD Consulting -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Module is unknown when signing on
On some of my images (SLES 10 SP 2), when I try to logon from the console, I get: Last login: Wed Jan 21 16:20:38 CST 2009 from nss-lt-0001.stlouiscity.com on pts /0 You have new mail. Module is unknown Welcome to SUSE Linux Enterprise Server 10 SP2 (s390x) - Kernel 2.6.16.60-0.21-d efault (ttyS0). linux62 login: The "Module is unknown" seems to be a problem. I immediately get signed off and I go back to the logon prompt. I haven't applied any maintenance other then the SP2. And it doesn't happen on all images. What could cause that? Thanks Tom Duerbusch THD Consulting -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Minidisks and DASD model 3/9
Among all the other thoughts that were brought upit depends on what performance you want. For example, I have some test Linux systems, that are a single 3390-9. All software is on it and data. Just something easy to play with. However it is limited as the volume can only be on a single Raid Array. And every Raid Array can end up bottlenecking on I/O, if there is sufficient I/O. Your other Raid Arrays (I have 8 arrays), may be idle. >From a performance side, Oracle seems to like to manage its own disks, and of course, each disk being on separate Raid Arrays. However, from a management side, putting the disks in a LVM and giving it to Oracle, saves people costs. So, how busy is the Oracle? If you are not pounding it, then use LVM and save people costs. That type of consideration also plays for any application that has large pools of disk space, Oracle, DB2, Samba, NFS, FTP Server, etc. Raid Arrays really eliminated most of the dasd performance tuning we use to do on a volume level. But you still may need to do it on a Raid Array level. You may want to try this experiment: Have Linux format 3 volumes. Two volumes on the same Raid Array, and the third on a different Raid Array. When Linux is formatting all three volumes at the same time, it has a "completion graph" shown. The single volume is formatted much faster then the other two. I know, twice as many I/Os should take longer, plus you are doing head seeks to boot. But it shows there is a difference in performance when you are on an Array that is highly used, vs lightly used. Tom Duerbusch THD Consulting >>> עופר ברוך 1/29/2009 6:18 AM >>> Hi all, We just bought some dasd storage specifically for z/VM and for the z/Linux underneath. This is the time to decide what model to use 3/9/27… Originally I thought "the bigger the better". We are using DIRMAINT to manage dasd space and now I am not sure what is the best approach. Here are my thoughts about large models: 1. I am concerned about fragmentation. Using model-3 I could just play around with full disks not worrying about fragmentation (meaning – adding storage to a Linux guest will add a full model-3) 2. I am concerned about IOSQ time. I know z/VM supports static PAV but that is just not comfortable… We don't have Hyperpav yet… 3. Using big minidisks will make cloning difficult, (I must have the same big gaps available for cloning). Here are my thoughts about model-3: 1. Many Many device addresses… Am I missing something? The more I think about it the more I believe that model-3 is the correct answer… Can you please help me out here? Thanks, Offer Baruch. -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Good editor for under the 3270 console interface
Ok got around the problem of "ed" not being on the rescue system. Use "ed" from the installed system (duh). /mnt/bin/ed filename So far, my testing using the rescue system, "ed" is the right tool. Thanks Tom Duerbusch THD Consulting >>> Dave Jones 1/28/2009 1:39 PM >>> Tom, for most 'simple' file editing that needs to be done from the 3270 console (i.e., before the network is available), I've found that the 'ed' editor works well. It's command set is small and easy for me to remember. Jack Woehr wrote: > Tom Duerbusch wrote: >> What is a good line mode editor? >> > ex is the traditional Unix line mode editor, written for just such > environments. > It's the dark side of vi :) > > man ex > > -- > Jack J. Woehr# I run for public office from time to time. > It's like > http://www.well.com/~jax # working out at the gym, you sweat a lot, > don't get > http://www.softwoehr.com # anywhere, and you fall asleep easily afterwards. > > -- > For LINUX-390 subscribe / signoff / archive access instructions, > send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or > visit > http://www.marist.edu/htbin/wlvindex?LINUX-390 -- DJ V/Soft z/VM and mainframe Linux expertise, training, consulting, and software development www.vsoft-software.com -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Good editor for under the 3270 console interface
However, it is not on the rescue system. Tom Duerbusch THD Consulting >>> Dave Jones 1/28/2009 1:39 PM >>> Tom, for most 'simple' file editing that needs to be done from the 3270 console (i.e., before the network is available), I've found that the 'ed' editor works well. It's command set is small and easy for me to remember. Jack Woehr wrote: > Tom Duerbusch wrote: >> What is a good line mode editor? >> > ex is the traditional Unix line mode editor, written for just such > environments. > It's the dark side of vi :) > > man ex > > -- > Jack J. Woehr# I run for public office from time to time. > It's like > http://www.well.com/~jax # working out at the gym, you sweat a lot, > don't get > http://www.softwoehr.com # anywhere, and you fall asleep easily afterwards. > > -- > For LINUX-390 subscribe / signoff / archive access instructions, > send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or > visit > http://www.marist.edu/htbin/wlvindex?LINUX-390 -- DJ V/Soft z/VM and mainframe Linux expertise, training, consulting, and software development www.vsoft-software.com -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Good editor for under the 3270 console interface
man ex gives me the man page for vi. ex being an short way to start up vi and put it in "ex mode". And when I try "ex", yep, that's vi . Tom Duerbusch THD Consulting >>> Jack Woehr 1/28/2009 12:58 PM >>> Tom Duerbusch wrote: > What is a good line mode editor? > ex is the traditional Unix line mode editor, written for just such environments. It's the dark side of vi :) man ex -- Jack J. Woehr# I run for public office from time to time. It's like http://www.well.com/~jax # working out at the gym, you sweat a lot, don't get http://www.softwoehr.com # anywhere, and you fall asleep easily afterwards. -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Clone SUSE 10
There are two places where the disk needs to be changed: /etc/fstab /etc/zipl.conf The zipl.conf is used for booting and on the way up, the fstab is used. linux63:/etc # cat /etc/fstab /dev/disk/by-path/ccw-0.0.0150-part1/ ext3 acl,user_xattr 1 1 < /dev/dasdd1 swapswappri=60 0 0 /dev/dasde1 swapswappri=50 0 0 proc/proc procdefaults 0 0 sysfs /syssysfs noauto 0 0 debugfs /sys/kernel/debug debugfs noauto 0 0 devpts /dev/ptsdevpts mode=0620,gid=5 0 0 /dev/system/system /home ext3acl,user_xattr 1 2 linux59.stlouiscity.com:/home/nfs/oracle102 /oracle/images nfs defaults 0 0 linux59.stlouiscity.com:/home/nfs/oracletmp /oracletmp nfs defaults 0 0 linux59.stlouiscity.com:/home/nfs/oraclebkup/oraclebkup nfs hard,bg,suid,rsize=32768,wsize=32768 0 0 linux63:/etc # cat /etc/zipl.conf # Modified by YaST2. Last modification on Tue Aug 12 21:25:38 UTC 2008 [defaultboot] defaultmenu = menu :menu default = 1 prompt = 1 target = /boot/zipl timeout = 10 1 = ipl 2 = Failsafe ###Don't change this comment - YaST2 identifier: Original name: ipl### [ipl] image = /boot/image target = /boot/zipl ramdisk = /boot/initrd,0x100 parameters = "root=/dev/disk/by-path/ccw-0.0.0150-part1 TERM=dumb" <=== ###Don't change this comment - YaST2 identifier: Original name: failsafe### [Failsafe] image = /boot/image-2.6.16.60-0.21-default target = /boot/zipl ramdisk = /boot/initrd-2.6.16.60-0.21-default,0x100 parameters = "root=/dev/disk/by-path/ccw-0.0.50-part1 TERM=dumb 3" < linux63:/etc # And, as I now see, the second set under [failsafe] is wrong. It should be 0.0.150, not 0.0.50 . I use Yast (partitioning) to change the fstab file. I manually must change the zipl.conf file. mkinitrd zipl boot and pray Tom Duerbusch THD Consulting >>> "Jones, Russell" 1/28/2009 12:15 PM >>> My zipl.conf now looks like this: * ANPLNX02:/etc# cat zipl.conf # Modified by YaST2. Last modification on Tue Nov 25 11:10:32 CST 2008 [defaultboot] defaultmenu = menu ###Don't change this comment - YaST2 identifier: Original name: linux### [SLES_10_SP1] image = /boot/image-2.6.16.54-0.2.10-default target = /boot/zipl ramdisk = /boot/initrd-2.6.16.54-0.2.10-default,0x100 parameters = "root=/dev/disk/by-path/ccw-0.0.322b-part1 dasd=322b,322f TERM=dumb" :menu default = 1 prompt = 1 target = /boot/zipl timeout = 10 1 = SLES_10_SP1 2 = ipl ###Don't change this comment - YaST2 identifier: Original name: ipl### [ipl] image = /boot/image target = /boot/zipl ramdisk = /boot/initrd,0x100 parameters = "root=/dev/disk/by-path/ccw-0.0.322b-part1 dasd=322b,322f TERM=dumb" ** And my myinitrd output looks like this: ** ANPLNX02:/etc# mkinitrd Root device:/dev/disk/by-path/ccw-0.0.322b-part1 (mounted on / as ext3) Module list:jbd ext3 dasd_eckd_mod (xennet xenblk) Kernel image: /boot/image-2.6.16.54-0.2.10-default Initrd image: /boot/initrd-2.6.16.54-0.2.10-default Shared libs:lib64/ld-2.4.so lib64/libacl.so.1.1.0 lib64/libattr.so.1.1.0 lib64/libblkid.so.1.0 li b64/libc-2.4.so lib64/libcom_err.so.2.1 lib64/libdl-2.4.so lib64/libext2fs.so.2.4 lib64/libhistory.so .5.1 lib64/libncurses.so.5.5 lib64/libpthread-2.4.so lib64/libreadline.so.5.1 lib64/librt-2.4.so lib6 4/libuuid.so.1.2 lib64/libnss_files-2.4.so lib64/libnss_files.so.2 lib64/libgcc_s.so.1 Driver modules: dasd_mod dasd_eckd_mod DASDs: 0.0.322a(ECKD) 0.0.322e(ECKD) 0.0.322b(ECKD) Filesystem modules: jbd ext3 Including: initramfs fsck.ext3 16371 blocks initrd updated, zipl needs to update the IPL record before IPL! I changed my dasd fstab setting to use device path, ipl'ed my base system, shut it down, copied the volume using mvs dss copy, ipl'ed the base system and mounted the cloned file system on the base system. I then did a chroot to the new file system. The mkinitrd command looks good except for the "DASDs" section. It is getting those addresses from what I have mounted on the base system and I want it to use 322b and 322f. Russell Jones ANPAC System Programmer rjo...@anpac.com -Original Message- From: Linux on 390 Port [mailto:linux-...@vm.marist.edu] On Behalf Of Mark Post Sent: Wednesday, January 28, 2009 10:12 AM To: LINUX-390@VM.MARIST.EDU Subject: Re: Clone SUSE 10 >>> On 1/28/2009 at 9:58 AM, "Jones, Russell" wrote: > Should the parameters in /etc/zipl.conf look like: > > root=/dev/dasda1 ro noinitrd No. If you do, your system won't boot. Just add 'dasd=addr1,addr2" to what is there now. Mark P
Re: Clone SUSE 10
Yes, if you are using "device name" in the fstab. There are other parms available also, and I don't know what they will generate in the zipl.conf and fstab files. I was getting burnt by the defaults changing to "device id", which really messes up cloning, disaster recovery, moving to a different raid array, etc. I like the "device path" option, mostly due to being a VM bigot (since the mid '70s). My boot device is 150. Data drives are 151 and up. LVM is the 160 range. etc. If I recall correctly, when you use the "device name", the device name dasda1, is assigned to the lowest disk drive, dasdb1 to the next lowest, etc. Add a new low drive, say vdisk swap space and you won't be able to IPL. Novice mistake for sure. But who hasn't hit it? Many times, it is just what you get use to . Tom Duerbusch THD Consulting >>> "Jones, Russell" 1/28/2009 8:58 AM >>> Should the parameters in /etc/zipl.conf look like: root=/dev/dasda1 ro noinitrd Russell Jones ANPAC System Programmer rjo...@anpac.com -Original Message- From: Linux on 390 Port [mailto:linux-...@vm.marist.edu] On Behalf Of Tom Duerbusch Sent: Tuesday, January 27, 2009 5:08 PM To: LINUX-390@VM.MARIST.EDU Subject: Re: Clone SUSE 10 When you installed you SLES 10 system, you took the defaults for FSTAB. Change you base system: yast System Partitioner, yes edit each disk fstab options change Device ID to Device Path, ok ok apply quit Then: In one session: cat /etc/fstab In another session joe /etc/zipl.conf modify the parameters = "root=~ may be in multiple places save mkinitrd zipl Boot to put in effect Now flashcopy will produce a bootable copy. Now reclone your system. Tom Duerbusch THD Consulting >>> "Jones, Russell" 1/27/2009 3:54 PM >>> I do mean root file system. Here is my zipl.conf. I don't see any device address in this file. *** # Modified by YaST2. Last modification on Tue Nov 25 11:10:32 CST 2008 [defaultboot] defaultmenu = menu ###Don't change this comment - YaST2 identifier: Original name: linux### [SLES_10_SP1] image = /boot/image-2.6.16.54-0.2.10-default target = /boot/zipl ramdisk = /boot/initrd-2.6.16.54-0.2.10-default,0x100 parameters = "root=/dev/disk/by-id/ccw-STK.028176.0022.2a-part1 TERM=dumb" :menu default = 1 prompt = 1 target = /boot/zipl timeout = 10 1 = SLES_10_SP1 2 = ipl ###Don't change this comment - YaST2 identifier: Original name: ipl### [ipl] image = /boot/image target = /boot/zipl ramdisk = /boot/initrd,0x100 parameters = "root=/dev/disk/by-id/ccw-STK.028176.0022.2a-part1 TERM=dumb" *** Russell Jones ANPAC System Programmer rjo...@anpac.com -Original Message- From: Linux on 390 Port [mailto:linux-...@vm.marist.edu] On Behalf Of Mark Post Sent: Tuesday, January 27, 2009 3:43 PM To: LINUX-390@VM.MARIST.EDU Subject: Re: Clone SUSE 10 >>> On 1/27/2009 at 4:38 PM, "Jones, Russell" wrote: -snip- > I want 322b to be my ipl volume and also bring 322f online at startup. By IPL volume, do you mean root file system? (The two are completely different things.) What do you have in /etc/zipl.conf? Mark Post -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Clone SUSE 10
When you installed you SLES 10 system, you took the defaults for FSTAB. Change you base system: yast System Partitioner, yes edit each disk fstab options change Device ID to Device Path, ok ok apply quit Then: In one session: cat /etc/fstab In another session joe /etc/zipl.conf modify the parameters = “root=~ may be in multiple places save mkinitrd zipl Boot to put in effect Now flashcopy will produce a bootable copy. Now reclone your system. Tom Duerbusch THD Consulting >>> "Jones, Russell" 1/27/2009 3:54 PM >>> I do mean root file system. Here is my zipl.conf. I don't see any device address in this file. *** # Modified by YaST2. Last modification on Tue Nov 25 11:10:32 CST 2008 [defaultboot] defaultmenu = menu ###Don't change this comment - YaST2 identifier: Original name: linux### [SLES_10_SP1] image = /boot/image-2.6.16.54-0.2.10-default target = /boot/zipl ramdisk = /boot/initrd-2.6.16.54-0.2.10-default,0x100 parameters = "root=/dev/disk/by-id/ccw-STK.028176.0022.2a-part1 TERM=dumb" :menu default = 1 prompt = 1 target = /boot/zipl timeout = 10 1 = SLES_10_SP1 2 = ipl ###Don't change this comment - YaST2 identifier: Original name: ipl### [ipl] image = /boot/image target = /boot/zipl ramdisk = /boot/initrd,0x100 parameters = "root=/dev/disk/by-id/ccw-STK.028176.0022.2a-part1 TERM=dumb" *** Russell Jones ANPAC System Programmer rjo...@anpac.com -Original Message- From: Linux on 390 Port [mailto:linux-...@vm.marist.edu] On Behalf Of Mark Post Sent: Tuesday, January 27, 2009 3:43 PM To: LINUX-390@VM.MARIST.EDU Subject: Re: Clone SUSE 10 >>> On 1/27/2009 at 4:38 PM, "Jones, Russell" wrote: -snip- > I want 322b to be my ipl volume and also bring 322f online at startup. By IPL volume, do you mean root file system? (The two are completely different things.) What do you have in /etc/zipl.conf? Mark Post -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Z/Linux CKD DASD migration from one DASD Subsystem to another
And if I remember correctly, when Mark joined Novell, we had this little 2 GB memory problem in VM. That would force many large zLinux shops to have production running in LPARs. They could still leave test and smaller zLinux images under z/VM. But the 2 GB line is no longer much of a problem. Tom Duerbusch THD Consulting >>> David Boyes 1/22/2009 3:07 PM >>> On 1/21/09 5:09 PM, "Mark Post" wrote: >>>> On 1/21/2009 at 2:31 PM, David Boyes wrote: > -snip- >> If I haven't said it before, I don't think there's much reason to ever >> consider LPAR deployment of Linux, but others do disagree with that view. >> I'm sure there are workloads where it would matter, but I still think the >> manageability loss dramatically overwhelms any cost advantage from omitting >> VM. > > When I first joined Novell, I was surprised to learn that the world's largest > implementation was done all in LPARs. From what I was told, that wasn't > because of the dollar cost of z/VM, but the overhead. Given the number of > processors running, I could (somewhat) understand that, but to me that says > that "people time is free" is the attitude, and that leads to another whole > set of problems. True enough. There's always exceptions, but they are just that: exceptions. Right tool, right job, and LPAR is only rarely the right tool to make Linux on Z interesting. -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Z/Linux CKD DASD migration from one DASD Subsystem to another
Hi David You said that if you used dedicated disks, you will now pay for it. I'm interested in "why you would pay for it"? Your procedure works the same with dedicated dasd, except instead of linking the disk, you attach the disks. Now, if you were thinking LPAR, when then, yes, I agree it is much more complicated. Thanks Tom Duerbusch THD Consulting >>> David Boyes 1/21/2009 12:42 PM >>> On 1/21/09 12:02 PM, "tony...@bellsouth.net" wrote: > Hi all, > I would like to know what ways you have used to migrate z/Linux CKD DASD > volumes from one DASD subsystem to another? Thanks. If you used minidisks (the right way, IMHO) then you: 1) Allocate new minidisks on the new array using a knowable pattern, eg if you have a 150 on the existing guest, allocate a new minidisk at F150 on the userid. Do this for all the minidisks on that userid. 2) Shut the guest down. You need to do this to get a good copy. 3) From an appropriately privileged ID (MAINT, etc): LINK guest 150 150 RR (you don't need/want write access to this volume) LINK guest F150 F150 MR(you're going to overwrite this one, so write) 4) DDR the contents of one to the other: DDR SYSPRINT CONS INPUT 150 3390 SCRTCH OUTPUT F150 3390 SCRTCH COPY ALL 5) DETACH 150 DETACH F150 6) Repeat #3 and #4 for all the other minidisks for that userid. 7) Update the CP directory and swap the MDISK definitions for the 150 and F150 MDISKs (make the old one F150, and the new one 150). Repeat for all minidisks on that userid. Write the CP directory either by hand or using your directory manager. If you want, you can just comment the old disks out in the directory entry in case you need to switch back for some reason. 8) IPL the guest as normal. That id is now running on the new disks. 9) Deallocate the Fxxx disks. If you commented them out in step 8, they are now free disk space until you overwrite them or reallocate the space. 10) Repeat for all guests. If you used dedicated volumes, now you pay for it. There is a procedure on linuxvm.org to do this -- you get to do it the hard way. -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: [BULK] Z/Linux CKD DASD migration from one DASD Subsystem to another
One thing to consider if you are on SUSE 10, the fstab defaults changed. And that stops you from copying/moving from one disk to another, even on the same DASD subsystem. Go into: yast System Partitioner edit each disk FSTAB options change Device ID to Device Path ok ok apply Go into /etc/zipl.conf modify the parameters "root=~" save mkinitrd zipl Or Rich has a RPM, that when loaded and executed will do the same thing. Tom Duerbusch THD Consulting >>> 1/21/2009 11:02 AM >>> Hi all, I would like to know what ways you have used to migrate z/Linux CKD DASD volumes from one DASD subsystem to another? Thanks. -- Respectfully, Anthony Mungal email: tony...@bellsouth.net phone: (561) 504-9212 fax: (801)607-6787 -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Encryption on a 7060
There are not many holes, but things to consider. We had a MP3000 H30 also. 1. It doesn't perform Linux stuff as well as other mainframes. There is a CPU instruction added in newer systems, that made Linux performance much better. So, don't take poor performance on the MP3000 as an indication of performance on new boxes. But if you lave the CPU time available, it works. 2. You have to run SLES 7 or SLES8 (in 31 bit mode). As these are older distros, they may run out of support. That may affect how auditors view the setup. 3. As 31 bit code disappears, you may not be able to keep up with the Jones with respect on where you are sending the files. I don't know how backleveled encryption software goes. You might be limited to 128 bit encryption instead of 2k encryption keys. 4. I have a GPG server which encripts files for our VSE systems. It runs in 96 MBs, with vdisk for swapping. You shouldn't have problems getting that much real memory carved out. Tom Duerbusch THD Consulting >>> "David L. Craig" 1/13/2009 12:00 PM >>> I curate a museum which includes a uni-CP Multiprise 3000 (7060-H30) with 2 GB in basic mode running VM/ESA 2.2 and hosting VSE/ESA 2.2 in V=R. We may be required by auditors to encrypt files for transmission to other hosts. I'm saying it's feasible to install a Linux distribution into a V=V virtual machine and perform the encryption there, either with gpg or by using openssl. We're currently averaging about 20% CPU utilization. Can anyone see any holes in this? Do current distros still support this platform or will I need something older, and if so, will current encryption software work on the older distro? -- May the LORD God bless you exceedingly abundantly! Dave Craig - - - - - - - - - - - - - - - - - - - - "'So the universe is not quite as you thought it was. You'd better rearrange your beliefs, then. Because you certainly can't rearrange the universe.'" --from _Nightfall_ by Asimov/Silverberg -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
