Re: Curious about crash.

2015-12-17 Thread Jonathan Quay
Isn't it complaining about not finding the root filesystem, not about not
finding the /boot filesystem?  I would take a look at that partition in
question that it can't find.

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Re: Network Time Protocol Daemon needed for zLinux?

2015-03-19 Thread Jonathan Quay
Its celestially motivated.  Computers only care about the number of ticks
since the start of some arbitrary epoch.

P.S.  I got the ELO reference.

*​ *

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Re: Linux guests on DR machine not reachable

2014-10-30 Thread Jonathan Quay
Default route in /etc/sysconfig/network.

On Thu, Oct 30, 2014 at 10:26 AM, Chase, John jch...@ussco.com wrote:

 No.

   -jc-

  -Original Message-
  From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of
 Ambros, Thomas
  Sent: Thursday, October 30, 2014 9:11 AM
  To: LINUX-390@VM.MARIST.EDU
  Subject: Re: Linux guests on DR machine not reachable
 
  Are you running mproute?
 
  Thomas Ambros
  zEnterprise Operating Systems
  zEnterprise Systems Management
  518-436-6433
 
  -Original Message-
  From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of
 Chase, John
  Sent: Thursday, October 30, 2014 10:01
  To: LINUX-390@VM.MARIST.EDU
  Subject: Linux guests on DR machine not reachable
 
  Cross-posted to IBMVM and LINUX390 lists
 
  Greetings.
 
  We're bringing up z/VM and Linux guests for the first time at a D/R
 exercise.  Since we have our own
  CBU warm site, we create an isolated network to be used for the D/R
 exercise.  The primary internal
  network is prefixed 10.1 and the isolated D/R network is prefixed 10.2.
 
  After z/VM (6.2, non-SSI) IPLs, we logon TCPMAINT and edit PROFILE TCPIP
 to change the HOME and
  DEFAULTNET IP addresses from 10.1.xxx.yyy to 10.2.xxx.yyy, then shut
 down and restart TCPIP.  z/VM is
  now reachable from non-mainframe devices plugged into the isolated
 network (e.g., Ping from a laptop
  works fine; 3270 emulator sessions establish via non-ICC ports).
 
  Next we login to a Linux (RHEL 6.3 and 6.5) guest (3270 console), where
 we had pre-configured a
  clone of the ifcfg-eth0 file to specify 10.2 (instead of 10.1) in all
 the appropriate places.  We
  rename (mv) the prod and D/R copies so that ifcfg-eth0 now
 specifies 10.2 instead of 10.1 in all
  the right places.  We stop and restart network services, but Linux is
 not ping-able from outside.  OK
  let's reboot Linux.  No change; still can't ping Linux from outside the
 mainframe but within the
  isolated network.  OK, we'll just bounce the whole virtual machine
 (SIGNAL SHUTDOWN followed by
  XAUTOLOG from OPERATOR).  That didn't work, either.  We didn't notice
 any network-related error
  message as Linux came up again.
 
  Not much to go on, but can anybody think of what we might have missed in
 reconfiguring Linux to play
  in the isolated (10.2) network?
 
  TIA,
 
  -jc-
 
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Re: Linux file updates by timestamp and userid

2014-03-14 Thread Jonathan Quay
If all you want to do is provide some level of individual accountability
for users that sudo to root, you can modify root's shell's history file
processing to spin off separate history files based off who am i  to some
arbitrary location like /var/log/sudohistory with timestamps added via
HISTTIMEFORMAT.  Doesn't stop anybody from doing anything nefarious, but it
does answer the age old question Hey.. who updated this configuration
file?


On Thu, Mar 13, 2014 at 6:32 PM, Shan, Rita rita.s...@penfed.org wrote:

 Could anyone kindly provide information on how we can monitor/log zLinux
 file updates by timestamp and by user ID? We have a number of staff
 maintaining zLinux system all with sudo privilege, we need to have a way to
 track file updates by date/time/user-ID.

 Does AIDE provides these kind of detailed level information? What kind of
 overhead it will generate if we turned it on? Is there an inexpensive
 vendor tool for this?

 Any help is greatly appreciated

 Rita



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Re: zLinux Question

2014-02-15 Thread Jonathan Quay
Its really no different than asking if running Linux in a VMWare
environment on rack servers, do you need to have VMWare and rack server
expertise?   Yes, you do.

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Re: Where does Linux store path information for dasd devices?

2013-07-09 Thread Jonathan Quay
This may not be of much help, but  In our non mainframe environment
where we present NAS as SCSI, our filesystems drop into read only when they
experience time outs due to dasd controller performance and contention
issues, or underlying netiwork issues.  You can see it in the kernel
message ring buffer.  Perhaps you are experiencing similar problems with
your new disk subsystem?


On Tue, Jul 9, 2013 at 7:39 AM, Rick Barlow rrhbar...@gmail.com wrote:

 As far as I know, zHPF is disabled.  However, I do not know how to confirm
 that.

 We have 8 FICON paths to the DASD subsystem shared through switches to 2
 z196 machines each having 8 FICON paths to the switches.  Of the 8 paths, 4
 have been offline from all 8 LPARs for a couple of months while we waited
 for IODF changes and physical cabling changes to move those 4 paths from
 old switches to newer switches.  Last evening, I varied on the 4 paths that
 were moved to all 8 LPARs and verified that they were online to the DASD.
 I only spot checked the paths and not all 1800 volumes.  After I confirmed
 that all 8 paths were online to the DASD, I took the other 4 paths
 offline.  Shortly after that, the small subset of Linux guests began having
 problems.  We only saw issues on about 20 of over 500 Linux guests.

 I am going to open a PMR and find out how to capture documentation to
 better understand what is happening.

 Thank you to all who suggested possible solutions.

 Rick Barlow

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Re: More words on The Virtualization Cookbook Redbook residency

2013-06-12 Thread Jonathan Quay
Since that is a fairly key differentiator for the Z environment, and
something that management can probably understand (hey, look, cross memory
networking), you should really try to have a page or two on setting it up.


On Wed, Jun 12, 2013 at 9:46 AM, Michael MacIsaac mike...@us.ibm.comwrote:

 John,

  you might include a (sub)chapter on setting up a Hipersockets network.
 Thanks for the input - we will add it to the (wish) list...

 Mike MacIsaac mikemac at-sign us.ibm.com

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Re: Error while IPLing Cloned Server - RHEL 6.3 on System Z

2013-05-21 Thread Jonathan Quay
Right.  Linux knows what the underlying virtual address are since they
are the real addresses to it.  So everywhere in linux's configuration files
it expects things to be at 0.0.0300 and 0.0.0301 and it sounds like you
have given it the 200's.



On Tue, May 21, 2013 at 7:25 AM, Davis, Larry (National VM Capability) 
larry.dav...@hp.com wrote:

 Change the Virtual addresses to 300 and 301 and IPL and see if all works



 Larry Davis,
 VM Capability


 -Original Message-
 From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of
 Paolo Cacciari
 Sent: Tuesday, May 21, 2013 4:50 AM
 To: LINUX-390@VM.MARIST.EDU
 Subject: Re: Error while IPLing Cloned Server - RHEL 6.3 on System Z

 Srinivas,

 are cuuadd 200  201 included in your /etc/dasd.conf ??


 Paolo Cacciari
 Senior IT Specialist - Certified

 IBM Italia S.p.A.
 Sede Legale: Circonvallazione Idroscalo - 20090 Segrate (MI) Cap. Soc.
 euro 347.256.998,80 C. F. e Reg. Imprese MI 01442240030 - Partita IVA
 10914660153 Società con unico azionista Società soggetta all?attività di
 direzione e coordinamento di International Business Machines Corporation

 (Salvo che sia diversamente indicato sopra / Unless stated otherwise
 above)

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Re: DASD format from Linux only

2013-03-12 Thread Jonathan Quay
Its one of those funny FBA devices that live on a 3390.


On Tue, Mar 12, 2013 at 3:20 PM, Tom Huegel tehue...@gmail.com wrote:

 Now I feel stupid .. I was looking at the type FBA-512 and was off thinking
 FBA(F=format??) I am going to blame it on the new dog, he kept me up all
 night with his wimpering..

 On Tue, Mar 12, 2013 at 11:51 AM, Mark Post mp...@suse.com wrote:

   On 3/12/2013 at 02:45 PM, Tom Huegel tehue...@gmail.com wrote:
   Excuse my ignorance, but what is FBAF?
  
   On Tue, Mar 12, 2013 at 5:31 AM, Pavelka, Tomas tomas.pave...@ca.com
  wrote:
  
   We have been trying to format all minidisks from Linux only and this
   turned out to be problematic. I am looking for a solution that would
  let us
   stay in Linux without having to involve CMS format for every new
  minidisk.
   Let me first describe the problem:
   When there is a record on dasd that has incorrect cylinder in the
 count
   area, this leads to record not found errors when the dasd is brought
   online. Since the dasd needs to be online before the problem is fixed
  (by
   formatting) the only way around that I can see is to preformat in CMS.
   If new minidisks are regularly formatted and destroyed, it is possible
  to
   run into situation where part of the disk has the correct format and
  part
   has the cylinder number in the count area wrong.
  
   Here is a way to reproduce:
  
  
   1) Create a minidisk and format it with CDL, e.g.
  
   MDISK FBAF 3390 4819 1000 VMBL2H WR
 
  It's the MDISK device address.
 
 
  Mark Post
 
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Re: Adding a Volume to a LV

2013-01-25 Thread Jonathan Quay
Its not an LVM.  Its probably created by multipath.

On Fri, Jan 25, 2013 at 2:41 PM, David Stuart david.stu...@ventura.orgwrote:

 Morning,

 I'm fairly new to the linux environment, and I haven't done much with the
 System for many months, now.  (It was set up as a POC, but mgmt could never
 decide what to POC with it).

 I need to add a volume to a logical volume group.  A df command shows the
 following:

 /dev/mapper/oracle--vg-u01
7087616   6606292121288  99% /u01

 But no matter what I try, a vgdisplay command says Volume group not found.
  And if I go to /dev/mapper, I see this:

 brw-r- 1 root disk 252, 0 Jan 15 15:59 oracle--vg-u01

 I have a volume activated and formatted, and I've done the pvcreate, so
 it's all ready to go.  I just need to determine the name of the volume
 group.

 Can someone please point out my error, please?


 Thanks,
 Dave





 Dave Stuart
 Prin. Info. Systems Support Analyst
 County of Ventura, CA
 805-662-6731
 david.stu...@ventura.org


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Re: Twin penguins prospered for 417 days, then died

2013-01-12 Thread Jonathan Quay
We have some  2.6.16.60 systems up for over 600 days before having to POR
the underlying z10.  I did an uptime on them just before shutting down out
of curiosity.

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Re: zVM-question

2012-08-15 Thread Jonathan Quay
AIX can be brought into the mainframe ecosystem by running it on zbx
blades, but not directly on z processors.  IBM has a good bit of
information available about doing that.

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Re: z/Linux and z/OS

2012-08-01 Thread Jonathan Quay
There are a lot more hurdles to overcome in a zLinux POC than just
technical ones.  We as technicians can create a bright, shiny new
infrastructure that can stand on its hind legs and dance.  But somebody's
got to eventually stroke a check for a big number to IBM.  For that to
happen, you have to have an engaged IBM sales team who can fight the
battles of organizational inertia, the business case, budget constraints of
mainframes vs. incremental investments in intel platforms, and the CIO who
fancies himself a forward thinker (i.e. anti-IBM).  That's a lot to ask
of the current woefully understaffed IBM sales and marketing organization.



On Wed, Aug 1, 2012 at 5:06 AM, Shane G ibm-m...@tpg.com.au wrote:

 Seems this is a common refrain in this neck of the woods.
 Lots of blue-sky stories, then little or no engagement.

 There are (significant) successes, of which there are a few people
 subscribed
 here, but there are also a number that are (deliberately) unpublicised.
 Very unfortunate.

 zLinux in Aus appears to the watching masses to be the promising child that
 just never lived up to expectations.

 Shane ...
 (Tony, can you change your reply to pls)

 On Wed, Aug 1st, 2012 at 8:48 AM, Tony Saul wrote:

  I'm probably just jealous and frustrated when I see success stories as I
  have been bashing my head against a brick wall for so long.

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Re: z/Linux and z/OS

2012-08-01 Thread Jonathan Quay
That's another huge problem, as engineering has traditionally been siloed
by hardware technology and the groups usually eye each other with attitudes
ranging from wariness to utter disdain.  Trying to get co-operation when
viewed as a threat is never easy.  Let's say that management decides zLinux
is good.  You're still likely to have both intel and z running in parallel
for years.  You want to be able to leverage your people, which means that
folks have to be willing to take on larger roles and become platform
agnostic.  Your systems, virutalization, storage, network, middleware, etc
people have to become comfortable with each other and work together as a
team.  You've got to integrate both platforms into your operational support
structures.  That's a big challenge for management who's got to keep a lot
of plates spinning just to achieve the incremental goodness that the
platform choice offers.  In a mainframe-centric shop that may not be too
hard.  In a enterprise that already has vast amounts of linux/unix
workload, that is going to be difficult.

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Re: Run NTP on zLinux or not?

2012-06-06 Thread Jonathan Quay
Same way we got incented.  Management makes a commitment to hire, train,
and compensate zVM people.  Do you see that happening in today's world of
commodity hardware, open source software, and lowest common denominator
application development?

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Re: Moving LVM volume group to another system

2011-12-21 Thread Jonathan Quay
Did you do a vgscan?

On Wed, Dec 21, 2011 at 9:33 AM, Mark Pace pacemainl...@gmail.com wrote:

 I've had a disk failure on my linux root filesystem, please don't ask how
 that happened, and now need to move an LVM file system to another Linux
 guest.
 I've added all the disk to the guest, put them all online and doing a
 pvscan I see that they are all there.  What I can't figure out is how to
 bring them into this system.  Every reference I find is for when you were
 able to do an vgexport ahead of time.  I didn't have that luxury and so I
 can not do a vgimport.

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 Mainline Information Systems

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Re: Moving LVM volume group to another system

2011-12-21 Thread Jonathan Quay
Can you see the /dev/mapper structures now?  Mount 'em up.

* *

On Wed, Dec 21, 2011 at 9:50 AM, Mark Pace pacemainl...@gmail.com wrote:

 Yes.
 sles003:/srv/ftp # vgscan
  Reading all physical volumes.  This may take a while...
  Found volume group vg1 using metadata type lvm2



 On Wed, Dec 21, 2011 at 9:42 AM, Jonathan Quay jonathan.q...@ihg.com
 wrote:

  Did you do a vgscan?
 
  On Wed, Dec 21, 2011 at 9:33 AM, Mark Pace pacemainl...@gmail.com
 wrote:
 
   I've had a disk failure on my linux root filesystem, please don't ask
 how
   that happened, and now need to move an LVM file system to another Linux
   guest.
   I've added all the disk to the guest, put them all online and doing a
   pvscan I see that they are all there.  What I can't figure out is how
 to
   bring them into this system.  Every reference I find is for when you
 were
   able to do an vgexport ahead of time.  I didn't have that luxury and
 so I
   can not do a vgimport.
  
   --
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   Mainline’s positions or opinions
  
   Mark D Pace
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   Mainline Information Systems
  
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Re: Migrating UNIX application to z/Linux

2011-09-02 Thread Jonathan Quay
A coworker of mine made a presentation in front of an IBM Linux Council on
his experience migrating an old C language application from Sun Solaris to
Linux on Z.  The major effort was in 32 to 64 bit issues, endianness,
miscastings, migration across two generations of ANSI standards, application
polling differences on new hardware, and surrounding infrastructure
differences (gcc, make, etc).  However long you think its going to take,
double it and change to the next larger units of time.

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Re: Linux backups and restores to/from tape

2011-07-08 Thread Jonathan Quay
We also use NetBackup but it does balloon when it kicks off.  Obviously
everyone running virtualized linux is looking for a file level backup done
from the virtualization layer.  Symantec claims they are close in the VMWare
arena.  It would also be nice to deduplicate there too.

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Re: Set Share Relative

2011-06-14 Thread Jonathan Quay
You would think that's how it works, but it doesn't.  I'm sure our friends
and Velocity will chime in.

On Tue, Jun 14, 2011 at 11:49 AM, Scott Rohling scott.rohl...@gmail.comwrote:

 Depends on how granular you want to be, but I tend to go in 100
 increments... helps make the math easier.   At 200 you get twice as much
 access to resources as those at 100, at 1500, 15 times, etc.   If that
 seems
 like too much of a jump (twice as much) -- then go fractional.   150 for
 1.5
 times the access, etc.

 Scott Rohling


 On Tue, Jun 14, 2011 at 8:52 AM, Dean, David (I/S) david_d...@bcbst.com
 wrote:

  Is there a rule of thumb on setting relative shares for zVM users?
  Default
  has them at 100, we have increased important ones to 200.  I noticed the
  system users have very high shares, e.g. 1500.  So, when you are
  prioritizing, or de-prioritizing should you go in small incremental
 (25-50)
  or larger (say 100, 200)?
 
 
  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
 
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