materials. To the extent permitted by applicable law, CIT and
others may inspect, review, monitor, analyze, copy, record and retain any
communications sent from or received at this email address.
-Original Message-
From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of M
Does anyone have a chart that shows relative performance improvements of IFL
processors on a z13 compared to previous mainframes, back to z10?
Thanks for any help.
Ray Mrohs
Lockheed Martin Corporation
Service Delivery Staff
Infrastructure Operations
ray.mr...@usdoj.gov
202 307-6896
It's a bit of a balancing act. Running zLinux lean and mean also opens up the
possibility of extensive swapping under unusual conditions. With WebSphere and
other big Java applications, it's almost a given. Not a big issue when it's
only a couple servers, but in large 24x7 server pools, the
Hi,
Our environment consists of SLES 11.4 servers under VM 6.2.
Sometimes we have misbehaving Linux applications that dip heavily into the
SWAPGEN configured swap space. After things settle down, Linux never lets go of
the space until we issue a swapoff -a, and swapon -a. Of course I do this
Has anyone had a problem with Match Group and ChrootDirectory in sshd_config?
It worked fine in 11.3 but now the ChrootDirectory statement forces the client
to disconnect. A case is open with Novell but wondering if anyone else is
seeing this?
Ray Mrohs
Lockheed Martin Corporation
Service
You might be able to limp along without real VM support for a while, but it
will be much harder to diagnose and fix performance and capacity issues that
are bound to crop up. That's not to say you can't learn on the fly as your
Linux instances go through their development phase. You will also
Our site is looking to upgrade from WebSphere 7 Base to 8.5 ND. The new Network
Deployment version provides clustering and easier(?) maintenance. However I was
wondering about the true advantages of WAS ND running under Linux on a single
mainframe. For sure, we would be trading simplicity for a
That, plus IBM has an easier time marketing and selling its other UNIX
solutions. Our IBM sales people have tried to sell packages that run on zLinux
but management is not comfortable with it. It will take a while for the
pendulum to swing, but in the meantime they cite the average age of the
] On Behalf Of
Mrohs, Ray (JMD)
Sent: Friday, July 27, 2012 2:35 PM
To: LINUX-390@VM.MARIST.EDU
Subject: Any way to summarize system ACL settings?
Over time, some of my systems have ACLs scattered around and I'm
looking for a way to get a report of which users and groups have ACLs
set across
Over time, some of my systems have ACLs scattered around and I'm looking for a
way to get a report of which users and groups have ACLs set across a file
system. The closest I got so far is getfacl -Rst / , but it still gives a lot
of detail to sift through. Are there any utilities that will
Florian, thanks for the reply.
Hi,
This question is for those who are running SMT to service your SLES11 virtual
Linux servers. Do you maintain the repositories on x86 servers, z/Linux
servers, or other? Are there any security, capacity, or usability issues that
determined how your SMT is deployed? Thanks.
Ray Mrohs
Hi,
I recently activated and started using the basic hvc0 terminal driver in
SLES11. Its great to lose that last dependancy on 3215 line mode when fixing
bootup problems! I'm happy with the way it's set up now, but trying to get my
brain around the console=hvc0 zipl parameter. Since I can
Thank you.
-Original Message-
From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On
Behalf Of Klaus Bergmann
Sent: Monday, February 28, 2011 8:42 AM
To: LINUX-390@VM.MARIST.EDU
Subject: Re: Looking for a good tutorial
There are presentations from Hans Picht which cover
Hi,
I need to make a presentation describing the unique aspects of running Linux on
zSeries to a few UNIX/Linux guys who don't have any mainframe background. I
could throw something together myself but I figured I'd try online first to
maybe save some time and effort. Any material that
This just might be enough incentive to get them upgraded to SLES 11.
Thanks for the replies.
Ray
--
For LINUX-390 subscribe / signoff / archive access instructions,
send email to lists...@vm.marist.edu with the message: INFO
Hi All,
Is there a way to restrict scp and sftp users to their own directories in 10.3?
The ChrootDirectory option in sshd_config is only available as of SLES 11.
Ray Mrohs
U.S. Department of Justice
202-307-6896
--
For
processing. Do you
agree? Or am off track here?
Thanks
Tom Duerbusch
THD Consulting
Mrohs, Ray ray.mr...@usdoj.gov 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
Set swappiness to 0. Can you just start 1 node as a test?
Ray
-Original Message-
From: Linux on 390 Port [mailto:linux-...@vm.marist.edu] On
Behalf Of Daniel Tate
Sent: Monday, July 26, 2010 2:28 PM
To: LINUX-390@VM.MARIST.EDU
Subject: Re: OOM Condition on SLES11 running WAS -
requeriments for db2 ask a minimum of 3GB...
thanks for help!
On Fri, Jul 23, 2010 at 3:45 PM, Mrohs, Ray
ray.mr...@usdoj.gov wrote:
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
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.
Does he also need:
COMMAND SET VCONFIG MODE LINUX
due to the mixed environment?
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 Mark Post
Sent: Wednesday, July 21, 2010 5:24 PM
To:
console colors
On 7/16/2010 at 10:33 AM, Mrohs, Ray
ray.mr...@usdoj.gov wrote:
After upgrading from SLES10 to SLES11 we got new color
settings in PuTTY
sessions (good),
and the spooled console (not so good).
Also, what do you get when you run this short script from the
VM console
After upgrading from SLES10 to SLES11 we got new color settings in PuTTY
sessions (good),
and the spooled console (not so good). How do we turn console colors off so we
don't get this:
15:33:32 7 [?25l [80C [10D [1;32mdone [m 8 [?25h
Initializing /dev
Why not just DDR copy all the existing Linux disks to the new disks? Are you
installing a new version?
Ray Mrohs
-Original Message-
From: Linux on 390 Port [mailto:linux-...@vm.marist.edu] On
Behalf Of Mark Pace
Sent: Friday, July 02, 2010 4:34 PM
To: LINUX-390@VM.MARIST.EDU
True. After the instances have settled down and stabilized, the WSS of the
swapless server is appreciably larger than that of the others. And yes there is
a risk in doing this that I'm not willing to take in our production
environments. It would be nice to *someday* be able to simply define
This led me into an interesting area. I just set a couple of our test servers
to run without swap space. This could put a bigger paging load on VM at times,
but then again simplifying the Linux configuration and having VM do the heavy
lifting are both good selling points. I'm also thinking
-Original Message-
From: Linux on 390 Port [mailto:linux-...@vm.marist.edu] On
Behalf Of Marcy Cortes
Sent: Wednesday, June 23, 2010 3:45 PM
To: LINUX-390@VM.MARIST.EDU
Subject: Re: Memory use question
Rob mentioned the vm.swappiness setting and he and I have had
a lot of
Hi,
I am experimentally minimizing the footprint of a SLES10 WebSphere 7 instance
and seeing the following.
Swap is to v-disk.
top:
Tasks: 120 total, 3 running, 117 sleeping, 0 stopped, 0 zombie
Cpu(s): 5.3%us, 0.3%sy, 0.0%ni, 94.0%id, 0.3%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 2050776k
Marcy, thanks for the pointers. I verified that the thread pool default/max
numbers are the same, and the async I/O box remains unchecked. The swap space
used stays at 0 for a day or two, but slowly climbs. There are also dips but it
never returns to 0 until reboot. The WebSphere java proc
Message-
From: Linux on 390 Port [mailto:linux-...@vm.marist.edu] On
Behalf Of Rob van der Heij
Sent: Wednesday, June 23, 2010 11:06 AM
To: LINUX-390@VM.MARIST.EDU
Subject: Re: Memory use question
On Wed, Jun 23, 2010 at 4:46 PM, Mrohs, Ray
ray.mr...@usdoj.gov wrote:
The cache
What we really just saw is another young person being turned away from z/VM, at
a time when the next generation needs to be engaged and involved through
whatever means possible. But now he will probably direct his energies
elsewhere. IBM could be more proactive in culling new people, especially
I like the fact that you can run YUP on any Linux server. Mine runs on a
spare CentOS box that is also the installation server. Having it
separate and different eliminates the possibility of some
distribution-specific vulnerability disabling all of my systems at once.
Ray
-Original
Thanks Marcy. This site wants to install BMC Patrol agents on Linux so
we should be able to isolate IFL performance stats that way. But as you
say, if the legacy CMS workload constrains both CPs, a lightly used IFL
will change the average utilization reported by INDICATE LOAD. Its not a
big deal
We have a z10 BC with 2 CPs and 1 IFL, and the processors are shared
across two VM LPARs. I want to double check with someone that I have the
correct directory IFL statements for the Linux instances:
COMMAND SET VCONFIG MODE LINUX
COMMAND DEFINE CPU 0 TYPE IFL
On th HMC all the processors
PM, Mrohs, Ray
ray.mr...@usdoj.gov wrote:
Hi,
We are running SLES10 and WebSphere on 1 IFL and 2G storage. These
bursts of activity seem to happen every few hours.
Is occasional swapping in the thousands too high if its
going to VDISK?
What can cause the high 'wa' values? Our info
Hi,
We are running SLES10 and WebSphere on 1 IFL and 2G storage. These
bursts of activity seem to happen every few hours.
Is occasional swapping in the thousands too high if its going to VDISK?
What can cause the high 'wa' values? Our info is limited since this is a
test partition with no VM
Hi,
I'm trying to figure out why some of our SLES10 images have a 5 second
delay before prompting for the password during initial SSH logon. It
only happens once; if I put in a wrong password, it re-prompts
immediately. The images that have the delay are clones of the original
which does not have
My impression is that its more efficient, and that you would build that
efficiency into your 'golden image' so that it can be leveraged with the
building of each new image. I agree that in normal conditions theres
negligible difference, but when the host system is being stressed and
you really
Hi All,
We are running SLES10 SP2, and I am trying to switch our vdisk swap from
fba to diag. So far I:
1) run SWAPGEN EXEC with the reuse option (vdisks are defined in the CP
directory)
2) included dasd_diag_mod in the kernel configuration and ran mkinitrd
(verified with lsmod)
3) set the yast
Ron,
I only included this:
INITRD_MODULES=jbd ext3 dasd_diag_mod
The other two appear by default through some other config. Dasd_diag_mod
loads first according to the console log, but dasd_fba_mod loads just
before it creates the swap disks. Maybe I'll try specifying all the
drivers. I'm trying
-...@vm.marist.edu] On Behalf Of
Mark Post
Sent: Wednesday, July 29, 2009 12:34 PM
To: LINUX-390@VM.MARIST.EDU
Subject: Re: Dasd_diag_mod question
On 7/29/2009 at 10:04 AM, Mrohs, Ray ray.mr...@usdoj.gov wrote:
Hi All,
We are running SLES10 SP2, and I am trying to switch our vdisk swap
from
fba to diag
To all who are running test and production in different LPARS:
What technique(s) do you use to migrate or promote Linux instances from
your test LPAR to the production LPAR? Do you have safeguards in place
to absolutely avoid running on both sides with duplicate IP or disk
addresses? Do you
Sent: Tuesday, August 26, 2008 4:14 PM
To: LINUX-390@VM.MARIST.EDU
Subject: Re: Two Different YaST2 Control Center displays
On 8/6/2008 at 3:04 PM, in message
[EMAIL PROTECTED]
V,
Mrohs, Ray [EMAIL PROTECTED] wrote:
We have 2 SLES10 SP1 servers. When I start yast2 on the first linux,
the
xterm
Subject: Re: Two Different YaST2 Control Center displays
-Original Message-
From: Mrohs, Ray [mailto:[EMAIL PROTECTED]
No. They still look different. System A shows all the
elements on a scrolling screen. System B shows just the
elements for the active category.
System A gets
displays
On 8/6/2008 at 3:04 PM, in message
[EMAIL PROTECTED]
V,
Mrohs, Ray [EMAIL PROTECTED] wrote:
We have 2 SLES10 SP1 servers. When I start yast2 on the first linux,
the
xterm screen shows a long scrolling list of selections, and its slow.
On
the second linux, the Control Center display
We have 2 SLES10 SP1 servers. When I start yast2 on the first linux, the
xterm screen shows a long scrolling list of selections, and its slow. On
the second linux, the Control Center display is compact and all on one
screen, and its faster. Where should I look for the cause of the
differences?
I also try to keep /var (even /var/log), /home, and /tmp on separate
file systems. It reduces the chances of phone calls at 3AM!
Additionally I provide a 20cyl. /config disk which I maintain from CMS.
On startup, boot.local reads from /config to customize the Linux
instance on the fly.
Ray Mrohs
We can only get there through standardization. As long as different
vendors mess with whatever directories they want, we always run the risk
of missing or overwriting something during the service or upgrade
process. Careful inventory and change controls can circumvent the issue,
but it gets
Hi,
What's the best way for an admin to quickly see which minidisks map to
which Linux file systems? Is there one command that parses the contents
of fstab and /proc/dasd/devices?
Ray Mrohs
U.S. Department of Justice
202-307-6896
este e-mail si no es realmente necesario
-Mensaje original-
De: Linux on 390 Port [mailto:[EMAIL PROTECTED] En nombre de Mrohs,
Ray
Enviado el: martes, 29 de enero de 2008 16:40
Para: LINUX-390@VM.MARIST.EDU
Asunto: Mapping Minidisks to File Systems
Hi,
What's the best way for an admin
Hi,
We began testing Tomcat 5 a few weeks ago. It starts OK when I'm logged
in and I use '/etc/init.d/tomcat5 start'. However there is a problem
when starting during the boot process. From what I can tell in the logs,
it can't find jmx.jar which is normally part of the CLASSPATH
definition. I set
. The
directory location depends on the version of Tomcat, so you
will need to check out the documentation for the version you
are using.
-Original Message-
From: Linux on 390 Port [mailto:[EMAIL PROTECTED] Behalf Of
Mrohs, Ray
Sent: Thursday, August 30, 2007 7:08 AM
To: LINUX-390
I installed another SLES10 yesterday, and all seemed to go well until I
tried to ssh to the new instance. After going nuts for a while I looked
in SuSEfirewall2 and saw that the ssh parameter was missing, whereas it
exists in my first SLES10 instance. I manually updated the file and its
working
The ultimate, I think, would be a VM based backup tool that plays nice
with the Linux file system. It would:
1. Recognize if Linux is running.
2. If Linux is running, tell it to purge it's file cache and 'go to
sleep'.
3. Access a Linux minidisk and understand the file system that resides
there.
You will still need, in addition to the RPQ, a match book cover for
precise tape alignment. :)
If you put on bell bottoms and platform shoes, it will improve your
chances dramatically.
-Original Message-
From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On
Behalf Of Richard Pinion
For updates, I've gotten as far as configuring wget to fetch something
off the Novell site, but that's where my efforts stalled. The YAST
update setup is not very intuitive.
Ray Mrohs
U.S. Department of Justice
202-307-6896
-Original Message-
From: Linux on 390 Port [mailto:[EMAIL
In SLES10, there is something called zmd that had to be turned off. zmd
is in the default SLES10 boot process, and it consumes resources while
the instance sits idle.
We use this to shut it off:
chkconfig novell-zmd off
Ray Mrohs
U.S. Department of Justice
202-307-6896
-Original
We use this driver for our self-configuring instances. We'll stay tuned for any
new developments.
Ray Mrohs
Energy Information Administration
U.S. Department of Energy
-Original Message-
From: Rick Troth [mailto:[EMAIL PROTECTED]
Sent: Wednesday, January 25, 2006 11:28 PM
To:
Ray Mrohs
Energy Information Administration
U.S. Department of Energy
-Original Message-
From: Rick Troth [mailto:[EMAIL PROTECTED]
Sent: Wednesday, January 25, 2006 11:28 PM
To: LINUX-390@VM.MARIST.EDU
Subject: Re: CMSFS for SLES9 390x
I'm still in a state of relocation.
The code that
the utilities?
Mark Post
-Original Message-
From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On Behalf Of
Mrohs, Ray
Sent: Thursday, January 26, 2006 12:31 PM
To: LINUX-390@VM.MARIST.EDU
Subject: Re: CMSFS for SLES9 390x
We use this driver for our self-configuring instances. We'll stay tuned
Hi All,
What is the recommended download of CMSFS for this platform? The tar and
executables I've seen are a few years old and need some tweaking.
Thanks.
Ray Mrohs
Energy Information Administration
U.S. Department of Energy
For 10g I was under the impression we had to either use DBCONSOLE on each
instance OR use a separate (Intel?) grid server to connect to the individual
agents. If there is another option, we will gladly look at it.
Ray Mrohs
Energy Information Administration
U.S. Department of Energy
In concept it's very attractive. In reality, maintenance sometimes has to be
applied to read/write directories. Then you get into all kinds of complex
scenarios keeping everything at the same patch level. I'm looking at keeping
just
a gold image current with patches and software packages, and
A number of recent VM APARs relate to VSWITCH issues. Make sure you are fairly
current. Our SLES8 worked fine with VSWITCHes at kernel 2.4.19. Most are now at
2.4.21.
Ray Mrohs
Energy Information Administration
U.S. Department of Energy
-Original Message-
From: Wolfe, Gordon W
The guests should log themselves off. Do you have vmpoff=LOGOFF added to
/etc/zipl.conf?
Ray Mrohs
Energy Information Administration
U.S. Department of Energy
-Original Message-
From: James Melin [mailto:[EMAIL PROTECTED]
Sent: Monday, November 21, 2005 10:10 AM
To:
@VM.MARIST.EDU
Subject: Re: Having Linux tell VM that it has shutdown correctly
On Monday, 11/21/2005 at 10:20 EST, Mrohs, Ray [EMAIL PROTECTED]
wrote:
The guests should log themselves off. Do you have vmpoff=LOGOFF added to
/etc/zipl.conf?
Not required (and not desired) when using CP SIGNAL
I set up our VSWITCH networking in one of our VM partitions with controller and
OSA failover ability. I was under the impression I should define one more
controller than I have VSWITCHes, so I have 2 VSWITCHes and 3 controllers. But
it
looks like one controller can support any number of
You can also consider cmsfs, which will let you mount a CMS file system
(minidisk) thats maintained under VM. Then linux can read a CMS config file
during startup to control your apps, network information, etc. Just alter the
script in the config file before startup to affect the characteristics
Beware if the master VM is an older version than your home system. We also had
severe second level CPU performance problems until we moved all the virtual NICs
from individual OSA triplets to VSwitches.
Ray Mrohs
Energy Information Administration
U.S. Department of Energy
-Original
Also be sure to define who your high and low priority users and servers are, and
set your relative share values accordingly. This probably has the biggest effect
on performance than any other single tuning parameter. Then make sure everyone
(especially your lower priority users) understands what
The 'Creating initrd' stage repeatedly hangs at 62% completed. I have seen
references to this in the archives, but no definite culprits. Memory is set at
512M, with 4 non-diag vdisk swap disks. I made ramdisk_size=196608. The
installation server has been configured with mkinstallroot. There are no
:[EMAIL PROTECTED]
Sent: Thursday, November 03, 2005 5:19 AM
To: LINUX-390@VM.MARIST.EDU
Subject: Re: Question for Oracle shops
Mrohs, Ray wrote:
Some people might see this as dumbing down, but in reality competition calls
for a streamlined portable plug-n-play appliance, as opposed to complicated
A new approach is needed regarding maintenance of Linux images and product
installation in general. I'm a strong proponent of server appliances which are
pre-packaged with optimized OS and applications. In this case, SLES9 and Oracle
would come on a tape or be downloaded for a simple DDR
Imagine a PC vendor shipping just one operating system with their PCs :)
Linux/390 made a fairly big splash a few years ago. But it seems the community
news is languishing, and if you don't make headlines once in a while, you cease
to exist in the eyes of business managers. Our project manager
I use echo add device range=200 /proc/dasd/devices
Ray Mrohs
Energy Information Administration
U.S. Department of Energy
-Original Message-
From: Ranga Nathan [mailto:[EMAIL PROTECTED]
Sent: Tuesday, September 06, 2005 7:52 PM
To: LINUX-390@VM.MARIST.EDU
Subject: How to activate DASD
We are doing this now via VM:Tape and 3490/VTS/3592 housed in a IBM 3494 tape
library. Email me for more info.
Ray Mrohs
Energy Information Administration
U.S. Department of Energy
-Original Message-
From: Samuel Renato Jesus Marques Neves [mailto:[EMAIL PROTECTED]
Sent: Wednesday,
Maybe you can cut paste your results so far, so we can see where its failing.
Ray Mrohs
Energy Information Administration
U.S. Department of Energy
-Original Message-
From: Aristarc Diez Redorta [mailto:[EMAIL PROTECTED]
Sent: Tuesday, August 30, 2005 4:57 AM
To:
We just went through that, same environment on a z/800. Our poor test
performance
was due to different query optimizations vis-a-vis 9i. Also DB Console is a real
killer, don't activate it unless its needed. Now our performance is very
comparable to what it was on Oracle 9i. Theres a slightly
Of
Mrohs, Ray
Sent: Wednesday, July 27, 2005 9:32 AM
To: LINUX-390@VM.MARIST.EDU
Subject: Re: Oracle 10G POOR performance
We just went through that, same environment on a z/800. Our poor test
performance was due to different query optimizations vis-a-vis 9i. Also
DB Console is a real killer, don't
.
- Original Message -
From: Mrohs, Ray [EMAIL PROTECTED]
To: LINUX-390@VM.MARIST.EDU
Sent: Wednesday, July 27, 2005 9:40 AM
Subject: Re: Oracle 10G POOR performance
Yes. All rows is OK. As was mentioned, you DBA needs to investigate where
Oracle
is spending its time. Also check your top
If you install the cpint package on the monitoring Linux to invoke CP commands,
you can issue SIGNAL directly from that instance. It would need the correct
directory authorization for shutting down other servers.
Ray Mrohs
Energy Information Administration
U.S. Department of Energy
You can split up the DASD into equally sized minidisks and if you stripe the LV,
then Linux will initiate multiple I/Os across howewever many physical volumes
(minidisks) you have in the group. Depending on how many paths there are to the
mod-27 device, there may be a performance benefit(?).
Ray
Our current Samba implementation has a non-striped LVM. Theres the obvious
performance penalty but its offset by greater flexibility to change the file
system size as needed. I'd imagine the performance would be identical in a low
demand environment but varies exponentially as the load increases.
If its just DASD, define it as a full volume minidisk owned by a userid, and CP
LINK to it. Then you can stick to priv class G.
Ray Mrohs
Energy Information Administration
U.S. Department of Energy
-Original Message-
From: Alan Altmark [mailto:[EMAIL PROTECTED]
Sent: Friday, March 18,
When comparing zSeries Linux (assuming z/VM) to other platforms, here are some
10,000ft views.
1) In addition to favorable IFL pricing, theres reduced software charges when
licenses are based on number of CPUs, i.e. several test/production systems can
share one IFL.
2) No cables or physical
http://penguinwarehouse.com/
Ray Mrohs
Energy Information Administration
U.S. Department of Energy
--
For LINUX-390 subscribe / signoff / archive access instructions,
send email to [EMAIL PROTECTED] with the message: INFO
Our Oracle 9i databases run well in 350M SLES8. Actually they do alright with
256M, but 350 is required to apply some Oracle patches, so we leave it at that.
Four 200K block v-disks are assigned to each instance. The total SGA sizes vary
between 110M and 225M, which according to our DBA's
The monitor we use is a home-grown Java program that polls our Linux
applications
every 5 minutes. Our operators access it via a web page. Solid green next to the
server name means we are up and running. A red indicator signals trouble. This
has a triple verification function:
1. The instance is
Kernel sharing would be a nice-to-have feature. There just seem to be a lot of
issues surrounding it's implementation. They involve extensive bootup
customizations, r/o and r/w switching, and non-standard manipulations of file
systems. Ask five people how to do it and you will get five different
Administration
U.S. Department of Energy
-Original Message-
From: David Andrews [mailto:[EMAIL PROTECTED]
Sent: Monday, January 24, 2005 8:50 AM
To: LINUX-390@VM.MARIST.EDU
Subject: Re: Any caveats moving root filesystem to LVM?
On Fri, 2005-01-21 at 16:02 -0500, Mrohs, Ray wrote:
My rule-of-thumb
My rule-of-thumb is to only use LVM when it's necessary, as in providing more
file system space than one minidisk can provide. I put /temp, /var, etc. on
their
own minidisks so that errant processes cannot accidentally fill all the
available
free space and crash the system. Our LVMs hold
Pieter,
We have 6 3592s that are FICON-attached, and all the tape units (3490, VTS/3590,
3592) are housed in an IBM 3494 Tape Library Data Server that is shared by one
MVS and two VM partitions. Tape management on VM is done via VM:Tape and the RMS
utility of DFSMS. BrightStor Backup is a work in
CA has one that we got to work with VTS as well as 3592s, but it might only come
bundled with the BrightStor Enterprise/ARCserve Backup product.
Ray Mrohs
Energy Information Administration
U.S. Department of Energy
-Original Message-
From: Pieter Harder [mailto:[EMAIL PROTECTED]
Sent:
That's a nice capability, and for IBM to emulate that, there has to be a way to
quickly migrate *hundreds* of instances off a z-series box, assuming there's
another z-series system handy to take over the load. I believe on VMware you are
still dealing with a dozen or two OS images per box, max.
Our current workload consists of a dozen Linux Oracle servers in a 1-cpu LPAR.
CPU usage stays around 50% with very occasional spikes to 100%. I feel we have
good resource allocation for these servers via SHARE REL. Default MAX is NOLIMIT
and my question is whether LIMITSOFT would be of any
The only time we saw idle SLES8 instances hog a system is when we brought up our
z/VM 4.3 and it's guests under a 4.2 1st level at our DR site. 12 Linux
instances
pegged the CPU at 100%. We replaced the 1st level CP nucleus with 4.3, and then
everything was normal. We didn't investigate what the
Of Mrohs,
Ray
Sent: Wednesday, October 20, 2004 2:46 PM
To: [EMAIL PROTECTED]
Subject: Re: DASD configuration for SuSE SLES 8
You didn't mention updating zipl.conf. Your DASD address ranges have to go
in there. Then you run zipl to activate it. After that (you may have to
reboot), your disks will show
-0400
From: Mrohs, Ray [EMAIL PROTECTED]
I have several Oracle databases running in SLES8, each with 350M
storage and four 100MB v-disks.
VM partition storage is 8GB and 2GB expanded. I'm seeing page
stealing sometimes in the 90% range. Here's a typical reading:
AVGPROC-031% 01
XSTORE-72/SEC
I have several Oracle databases running in SLES8, each with 350M storage and four
100MB v-disks.
VM partition storage is 8GB and 2GB expanded. I'm seeing page stealing sometimes
in the 90% range. Here's a typical reading:
AVGPROC-031% 01
XSTORE-72/SEC MIGRATE-/SEC
MDC READS-00/SEC
1 - 100 of 103 matches
Mail list logo
