Re: IFL performance reference
Thanks. The raw PCI numbers on the charts and graphs suggest a 3-fold performance increase over a z10 BC. However with onboard JIT optimization and hardware multithreading, the z13 could show a 10x improvement with Java workloads. Ray Mrohs -Original Message- From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of Porowski, Ken Sent: Tuesday, February 02, 2016 10:43 AM To: LINUX-390@VM.MARIST.EDU Subject: Re: IFL performance reference LSPR, look at the uni-processor PCI/MIPs CIT | Ken Porowski | VP Mainframe Engineering | Information Technology | +1 973 740 5459 (tel) | ken.porow...@cit.com This email message and any accompanying materials may contain proprietary, privileged and confidential information of CIT Group Inc. or its subsidiaries or affiliates (collectively, "CIT"), and are intended solely for the recipient(s) named above. If you are not the intended recipient of this communication, any use, disclosure, printing, copying or distribution, or reliance on the contents, of this communication is strictly prohibited. CIT disclaims any liability for the review, retransmission, dissemination or other use of, or the taking of any action in reliance upon, this communication by persons other than the intended recipient(s). If you have received this communication in error, please reply to the sender advising of the error in transmission, and immediately delete and destroy the communication and any accompanying 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 Mrohs, Ray (JMD) Sent: Tuesday, February 02, 2016 10:24 AM To: LINUX-390@VM.MARIST.EDU Subject: [LINUX-390] IFL performance reference 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 -- 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/
IFL performance reference
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 -- 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: Status of VDISK after swap space usage
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 VDISK memory consumption could end up being a pretty big chunk. Some smart automation (with format?) run on a scheduled basis could keep things under control. If swap space is really big, then doing that operation on individual disks over timed intervals could minimize the impact on the rest of the LPAR. As Marcy says, maintenance forces a reboot eventually, but I can envision situations where rebooting (the immediate solution) just to reset swap space would cause eyes to roll among certain groups. And really, if we have to trim server memory to minimize file caching, then the swapping facility should be on the same page, so to speak. Conversely if Linux file caching can be turned off or restricted, then there might not be a need for swapping at all. Ray -Original Message- From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of Marcy Cortes Sent: Wednesday, December 09, 2015 6:06 PM To: LINUX-390@VM.MARIST.EDU Subject: Re: Status of VDISK after swap space usage This is interesting. Having 2TB of page space in test/dev I'm sure we have some potential space savings if this could be done across all dev/test servers... However, you'd really want to do this carefully and it might not even be practical if linux itself didn't drive this diag. If done outside (ala Rob's cmmflush), you'd need to swapoff the disk so that you first make linux clean it up and to prevent it from putting more on there. Swapoff of a full 2G disk takes a very long time (more than 30 minutes IIRC). It probably drives up the page rate while that is going on as well. And if you've done the swapoff, no big deal to just add a vary off, detach, define, mkswap, swapon to your script in lieu of a diag to do it. Probably would need to stagger this activity if you have a lot of servers on a single box. As often as we have to reboot or IPL VM for security patching, HW work, and other maintenance anymore, here anyway it gets cleaned up fairly often. So I can see why VM development would reject it since they'd really need Linux development to make use of it and Linux development might not be that interested if it's never going to be accepted into the kernel since the x side doesn't swap well anyway and adding cheap memory is the solution there. Actually, maybe it is here too. Making the vdisks smaller and memory size bigger and running CMM often might accomplish what is desired? -- 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/
Status of VDISK after swap space usage
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 after making sure that we have sufficient free memory available in that server. The reported swap use then effectively returns to zero. But it seems like nobody tells VM because the VDISK being retained in memory for that virtual machine, as reported by Velocity, is consistent with the maximum swap space that was used, something on the order of 190K pages, and it never decreases even though the Linux swap use stays at zero. Does VM ignore this until it hits a memory use threshold, or does Linux not clean up well after itself, or maybe we are missing something else? We are trying to avoid a "just reboot it" action. This is our typical swap disk entry in fstab: /dev/disk/by-path/ccw-0.0.0105 swap swap defaults 0 0 Ray Mrohs Lockheed Martin Corporation Service Delivery Staff Infrastructure Operations ray.mr...@usdoj.gov 202 307-6896 -- 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 11.4 sftp server issue?
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 Delivery Staff Infrastructure Operations ray.mr...@usdoj.gov 202 307-6896 -- 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: zLinux Question
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 want some level of automation to take place on VM to control your penguins and virtual switches, not to mention OS upgrades that have to be done every couple years. I.e., the VM guy is Santa. The Linux guys are the elves. My daughter came up with that when she tried to understand what I do at work. -Original Message- From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of David Boyes Sent: Friday, February 14, 2014 1:42 PM To: LINUX-390@VM.MARIST.EDU Subject: Re: zLinux Question If the person is interacting ONLY with the Linux portion, you need to learn a few things about the mainframe but not a lot -- you could compare the problem to learning/understanding a new BIOS. The stuff inside the Linux guest is the same as on other platforms. If the person is responsible for the entire environment (virtualization, automation, etc), then mainframe expertise (and specifically, z/VM) is more important. Most organizations treat that as the logical dividing line -- existing mainframe people manage the container (z/VM, hardware, etc), and the Linux folks manage what goes into the container. Don't forget to incorporate some networking folks into the team, too. > -Original Message- > From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of > Mark Smith If running Linux on an IBM mainframe, do you need to have a > "mainframe" > expert to administer the system or is a Linux expert sufficient? -- 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/
Any real world WebSphere ND guidance?
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 more complex environment, and am wondering about the advantages versus disadvantages that others have experienced. We have one application with one production WAS server, and several test WAS environments each running on their own Linux instance. Ray Mrohs US Department of Justice 202 307-6896 -- 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 and z/OS
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 mainframe support staff and the difficulty of replacing them. Our zLinux support is clustered within the mainframe group, unlike our other open systems that have their own specific teams. Working within that reality, it's important to have good communications with UNIX and Linux experts across the organization and elsewhere. We rely much more heavily on the network and the networking staff (LDAP, databases, etc.) than we ever did running just old mainframe applications, and resolving problems quickly requires good coordination between the various players. We also rely heavily on z/OS for encrypted DASD backups and file level Linux backups, so there are some additional recurring costs, and again team coordination between z/VM and z/OS. There is a lot to learn, shake out, and get comfortable with. We are taking very small steps, but our stuff stays up for many months at a time which is something very few others in the open systems arena can claim. Some folks are fascinated by the lack of physical infrastructure when they ask about the locations of presumably big servers. But I agree it's tough to rally support for something when certain key people continue to downplay or refuse to see the benefits. Ray Mrohs -Original Message- From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of Jonathan Quay Sent: Wednesday, August 01, 2012 8:44 AM To: LINUX-390@VM.MARIST.EDU Subject: Re: z/Linux and z/OS 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. -- 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: Any way to summarize system ACL settings?
Thanks John. I'll see what I can do with that. In the mean time my online
searches didn't turn up much. I can imagine such a utility would be handy on an
aggressively audited system.
Ray Mrohs
-Original Message-
From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of McKown,
John
Sent: Friday, July 27, 2012 4:08 PM
To: LINUX-390@VM.MARIST.EDU
Subject: Re: Any way to summarize system ACL settings?
I've not done much, but my first step was:
getfacl -Rst . | tr '\n' ' ' | { sed 's/#/\n#/g'; echo; } | cat
In a small test in the current directory, I had two files with ACLs in ~/z.
When I ran the above in ~, the output looked like:
# file: z/sort.info USER tsh009rw- user tss r-- GROUP
TSHG r-- mask r-- otherr--
# file: z/gawk.info USER tsh009rw- user postgres r-- user
tss r-- GROUP TSHG r-- mask r-- other
r--
Where the # is the first character in the link. In case of wrapping, there are
only two lines above, both starting with the #. My thought is to pipe that into
a Perl script for processing. There is one line per file, which I think would
be easier to parse up correctly. Unfortunately, I don't really have a lot of
time right now to "mess around". Also, I don't have very many files with ACLs,
so generating example output would be difficult for me.
Hope this helps you at least a small amount. I really think parsing the output
above will be easier than the output from getfacl.
--
John McKown
Systems Engineer IV
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> -Original Message-
> From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] 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 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 display ACL privileges in different ways, or
> clever programming ideas to put into scripts?
>
> Ray Mrohs
>
>
> --
> 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/
>
>
--
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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 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 display ACL privileges in different ways, or clever programming ideas to put into scripts? Ray Mrohs -- 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: SMT Repository question
Florian, thanks for the reply.
SMT Repository question
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 -- 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/
iucvconn experience
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 review real time console output via VM:Spool, what else does it provide and what else is required to make it effective? Ray Mrohs U.S. Department of Justice 202-307-6896 -- 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: Looking for a good tutorial
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 some of > the topics: > > www.vm.ibm.com/education/lvc/lvc0504c.pdf > > www.vm.ibm.com/education/basics/j0intzli.pdf > > Klaus Bergmann, System z Technical Sales, IBM South Africa > > -- > 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/
Looking for a good tutorial
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 describes DASD utilities, IFL, memory management etc. without delving too much into Linux basics would be great. Thanks for any help. Ray Mrohs U.S. Department of Justice 202-307-6896 -- 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: Caging sftp users in SuSE 10.3?
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 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/
Caging sftp users in SuSE 10.3?
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 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: VMWARE to own SUSE LINUX?
Z customers wouldn't be the only ones affected. Something like this could ruin IBM's business model for Linux expansion. I believe the majority of zlinux sites are running SuSE, due to the real or perceived close working relationship that Novell has with IBM and the benefits derived from it. 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 Rodger Donaldson > Sent: Saturday, September 18, 2010 6:44 AM > To: LINUX-390@VM.MARIST.EDU > Subject: Re: VMWARE to own SUSE LINUX? > > On Fri, Sep 17, 2010 at 11:30:08AM -0400, Brian France wrote: > > > Well I figured someone would already have asked this so > maybe I'm just > > a little to far there ( paranoia wise ) but - IF this is true, would > > they stop the sles 390 code possibly viewing z/VM and IBM a > > competition... Just wondering... > > I imagine that rather depends on how much money SuSE make out of the > 390 distro and what contractual arrangements they have. VMWare aren't > Oracle, I can't imagine them giving Z customers the middle finger by > discontinuing the product (assuming the rumours in same way end up as > reality). > > -- > Rodger Donaldson rodg...@diaspora.gen.nz > "Anyone who slaps a 'this page is best viewed with Browser X' > label on a Web > page appears to be yearning for the bad old days, before the > Web, when you > had very little chance of reading a document written on > another computer, > another word processor, or another network." -- Tim Berners-Lee > > -- > 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: Reducing Linux virtual machine size
You currently have 6GB defined... ~40% of that is 2.4GB. I would try dropping
the Linux memory to around 4GB, and maybe add some swap space.
Ray
> -Original Message-
> From: Linux on 390 Port [mailto:linux-...@vm.marist.edu] On
> Behalf Of Rogério Soares
> Sent: Monday, July 26, 2010 4:09 PM
> To: LINUX-390@VM.MARIST.EDU
> Subject: Re: Reducing Linux virtual machine size
>
> Ray, please check this:
>
> db2p105:~ # free -m
> total used free shared
> buffers cached
> Mem: 6025 4285 1739 0
> 16 4045
> -/+ buffers/cache:223 5801
> Swap:0 0 0
> db2p105:~ # ps -eo pmem | awk '{pmem += $1}; END {print "pmem
> = "pmem"%"}';
> pmem = 39.4%
>
> With this, i can say, this machine needs +/- 2GB ?
> this machine runs DB2... i'm a little confuse with this because system
> requeriments for db2 ask a minimum of 3GB...
>
> thanks for help!
>
>
> On Fri, Jul 23, 2010 at 3:45 PM, Mrohs, Ray
> 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 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
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> For more information on Linux on System z, visit
> http://wiki.linuxvm.org/
>
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http://wiki.linuxvm.org/
Re: OOM Condition on SLES11 running WAS - Tuning problems?
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 - Tuning problems? > > Yeah, i saw that.. problem is these same apps run on 16GB of mem on a > windows box.. > > We have 28 JVMs and sizes are set to 50/256. > > On Mon, Jul 26, 2010 at 11:07 AM, Marcy Cortes < > marcy.d.cor...@wellsfargo.com> wrote: > > > First of all, you've run out of memory on that server > (Swap: 35764956k > > total, 35764956k used,) > > It ate all of the 10G and all of the 35G of swap. > > How many JVM's are running and what are their min/max heap sizes? > > > > > > > > Marcy > > > > “This message may contain confidential and/or privileged > information. If > > you are not the addressee or authorized to receive this for > the addressee, > > you must not use, copy, disclose, or take any action based > on this message > > or any information herein. If you have received this > message in error, > > please advise the sender immediately by reply e-mail and delete this > > message. Thank you for your cooperation." > > > > > > -Original Message- > > From: Linux on 390 Port [mailto:linux-...@vm.marist.edu] On > Behalf Of > > Daniel Tate > > Sent: Monday, July 26, 2010 8:24 AM > > To: LINUX-390@vm.marist.edu > > Subject: [LINUX-390] OOM Condition on SLES11 running WAS - > Tuning problems? > > > > We're running websphere on a z9 under z/VM 4 systems are > live out of 8. > > it > > is running apps that consume around 16GB of memory on a > Windows machine. > > on > > this, we have allocated 10G of real storage (RAM) and around 35GB of > > Swap.When websphere starts, it consumes all the memory > eventually and > > halts, but not panics, the system.We are running > 64-Bit. I'm a z/VM > > novice so i don't know much to do.. > > > > Here is some information from our WAS Admin: > > "We are running WebSphere 6.1.0.25 with FP > EJB3.0,Webservices and Web 2.0 > > installed. There are two nodes running 14 application > servers each. there > > are currently 32 applications installed but not currently > running. No > > security has been enabled for WebSphere at this time." > > > > > > At this point i see two problems: > > > > 1) Why is OOM Kill not functioning properly > > 2) Why is websphere performance so awful? > > > > and have two questions > > > > 1) Does anyone have any PRACTICAL experience/tips to > optimize SLES11 on > > z/VM? So far we've been using dated case studies and > redbooks that seem to > > be filled with inaccuracies or outdated information. > > 2) Is there any way to force a coredump via the cp, like > you can with the > > magic sysrq? > > > > All systems are running the same release and patch level: > > > > [root] bwzld001:~# lsb_release -a > > LSB Version: > > > > > core-2.0-noarch:core-3.2-noarch:core-4.0-noarch:core-2.0-s390x :core-3.2-s390x:core-4.0-s390x:desktop-4.0-noarch:desktop-4.0-> s390:desktop-4.0-s390x:graphics-2.0-noarch:graphics-2.0-s390:g raphics-2.0-s390x:graphics-3.2-noarch:graphics-3.2-> s390:graphics-3.2-s390x:graphics-4.0-noarch:graphics-4.0-s390: graphics-4.0-s390x > > Distributor ID:SUSE LINUX > > Description:SUSE Linux Enterprise Server 11 (s390x) > > Release:11 > > Codename:n/a > > > > > > Here is a partial top shortly before system death: > > > > top - 08:13:14 up 2 days, 16:08, 2 users, load average: > 51.47, 22.20, > > 10.25 > > Tasks: 129 total, 4 running, 125 sleeping, 0 stopped, 0 zombie > > Cpu(s): 16.7%us, 81.5%sy, 0.0%ni, 0.0%id, 0.0%wa, > 0.3%hi, 0.3%si, > > 1.2%st > > Mem: 10268344k total, 10220568k used,47776k free, > 548k buffers > > Swap: 35764956k total, 35764956k used,0k free, > 56340k cached > > > > PID USER PR NI VIRT RES SHR S %CPU %MEMTIME+ > > COMMAND > > > > 26850 wasadmin 20 0 1506m 253m 2860 S 18 2.5 16:06.28 > > java > > 29870 wasadmin 20 0 1497m 279m 2560 S 15 2.8 15:41.13 > > java > > 24607 wasadmin 20 0 1502m 223m 2760 S 13 2.2 16:15.14 > > java > > 24641 wasadmin 20 0 7229m 1.3g 3172 S 13 13.1 196:35.52 > > java > > 26606 wasadmin 20 0 1438m 272m 6212 S 12 2.7 16:02.77 > > java > > 27600 wasadmin 20 0 1553m 258m 2920 S 12 2.6 15:46.57 > > java > > 24638 wasadmin 20 0 7368m 1.3g 24m S 10 13.7 206:02.05 > > java > > 25609 wasadmin 20 0 1528m 219m 2540 S9 2.2 16:07.33 > > java > > 30258 wasadmin 20 0 1515m 249m 2592 S7 2.5 15:49.79 > > java > > 25780 wasadmin 20 0 1604m 277m 2332 S6 2.8 16:31.41 > > java > > 27106 wasadmin 20 0 1458m 273m 2472 S6 2.7 15:59.13 > > java > > 27336 wasadmin 20 0 1528m 238m 2540 S5 2.4 15:38.82 > > java > > 29164 wasadmin 20 0 1527m 224m 2608 S5 2.2 16:02.56 > > java > > 31400 wasadmin 20 0 1509m 259m 2468 S5 2.6 15:26.38 > > java >
Re: Reducing Linux virtual machine size
My guess is that Oracle runs a few processes using shared memory. The script
just totals
all the procs, shared or not, so shared memory applications will definitely
skew the results.
Ray
> -Original Message-
> From: Linux on 390 Port [mailto:linux-...@vm.marist.edu] On
> Behalf Of Tom Duerbusch
> Sent: Friday, July 23, 2010 6:05 PM
> To: LINUX-390@VM.MARIST.EDU
> Subject: 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/
>
> --
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> send email to lists...@vm.marist.edu with the message: INFO
> LINUX-390 or visit
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> --
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> http://wiki.linuxvm.org/
>
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Re: Reducing Linux virtual machine size
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/
>
--
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send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit
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Re: IFL's, VM, and Linux
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: LINUX-390@VM.MARIST.EDU > Subject: Re: IFL's, VM, and Linux > > >>> On 7/21/2010 at 05:16 PM, Ed Long wrote: > > Thanks for thinking about our problem. > > So does your construct > > > > COMMAND DEFINE CPU 00 IFL > > > > effectively tell VM to assign the first real IFL to this VM > as CPU 00? > > No. This is referring to the virtual CPUs that the guest > will see, not the real hardware. > > > 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: SLES11 console colors
This is SLES11, no SP.
script results:
13:26:27 extd
13:26:27 0a|.|
13:26:27 0001
13:26:27 warn
13:26:27 0a|.|
13:26:27 0001
13:26:27 done
13:26:27 0a|.|
13:26:27 0001
13:26:27 attn
13:26:27 0a|.|
13:26:27 0001
13:26:27 norm
13:26:27 0a|.|
13:26:27 0001
13:26:27 stat
13:26:27 0a|.|
13:26:27 0001
13:26:27 lnxm500:~ #
Ray Mrohs
> -Original Message-
> From: Linux on 390 Port [mailto:linux-...@vm.marist.edu] On
> Behalf Of Mark Post
> Sent: Saturday, July 17, 2010 1:15 AM
> To: LINUX-390@VM.MARIST.EDU
> Subject: Re: SLES11 console colors
>
> >>> On 7/16/2010 at 10:33 AM, "Mrohs, Ray"
> 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?
> for var in extd warn done attn norm stat; do echo $var; echo
> ${!var} | hexdump -C; done
>
>
> Mark Post
>
> --
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> send email to lists...@vm.marist.edu with the message: INFO
> LINUX-390 or visit
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> --
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> http://wiki.linuxvm.org/
>
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SLES11 console colors
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 15:33:32 7 [?25l [80C [10D [1;32mdone [m 8 [?25h Mounting devpts at /dev/pts 7 [?25l [80C [10D [1;32mdone [m 8 [?25h It seems to be starting somewhere in /etc/init.d/boot. The zipl.conf parameters line is: parameters = "root=/dev/disk/by-path/ccw-0.0.0100-part1 dasd=100-11F TERM=dumb vmpoff=LOGOFF" Thanks. Ray Mrohs U.S. Department of Justice 202-307-6896 -- 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: User ID
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 > Subject: Re: User ID > > I was afraid to think it was that easy. > > On Fri, Jul 2, 2010 at 4:29 PM, McKown, John > wrote: > > > > -Original Message- > > > From: Linux on 390 Port [mailto:linux-...@vm.marist.edu] On > > > Behalf Of Mark Pace > > > Sent: Friday, July 02, 2010 3:25 PM > > > To: LINUX-390@VM.MARIST.EDU > > > Subject: User ID > > > > > > Is there an easy way to copy user account information from > > > Linux system to > > > another? I'm building a new guest and don't want to have to > > > redefine every > > > user id. > > > > > > -- > > > Mark Pace > > > > Would that just be copying /etc/passwd /etc/groups and /etc/shadow ? > > > > -- > > John McKown > > Systems Engineer IV > > IT > > > > Administrative Services Group > > > > HealthMarkets(r) > > > > 9151 Boulevard 26 * N. Richland Hills * TX 76010 > > (817) 255-3225 phone * (817)-961-6183 cell > > 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 > > > > > > > > > -- > > 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/ > > > > > > -- > Mark Pace > Mainline Information Systems > 1700 Summit Lake Drive > Tallahassee, FL. 32317 > > -- > 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: Memory use question
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 instances with CP storage allocation and let the software take care of how its all used, maybe through better control of file and buffer caching or something. Ray > -Original Message- > From: Linux on 390 Port [mailto:linux-...@vm.marist.edu] On > Behalf Of Martin, Terry R. (CMS/CTR) (CTR) > Sent: Monday, June 28, 2010 11:24 AM > To: LINUX-390@VM.MARIST.EDU > Subject: Re: Memory use question > > Hi > > Well this is not something I would do in my shop. Not having swap > available for Linux is just asking for trouble. One reason is that you > really want to size your guests in such a way that they use just a > trickle of swap this allows you to size a guest in terms of memory > defined to the guest to allow z/Linux to maximize the handling of the > memory and from a performance standpoint you really want it > to be VDISK. > > > > One of the things that makes running z/Linux under VM so appealing is > the ability to take a server running in Solaris let's say that has 20G > and cut that in half or more when it is migrated to z/Linux > under VM. To > do this you need to have flexibility when it comes to paging and > swapping for the guest. > > > Thank You, > > Terry Martin > Lockheed Martin - Citic > z/OS and z/VM Performance Tuning and Operating Systems Support > Office - 443 348-2102 > Cell - 443 632-4191 -- 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: Memory use question
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 about when I eventually
hand this work over to someone else. Not having to explain v-disks and the
interplay of paging and swapping between the hypervisor and guests could avoid
confusion and mistakes being made. Of course Linux memory utilization becomes
critical, and we can watch it with something like this and adjust virtual CP
storage accordingly:
ps -eo pmem | awk '{pmem += $1}; END {print "pmem = "pmem"%"}';
Right now our biggest WebSphere server is running comfortably at ~60% memory
used, out of 2G. Is anyone else running swapless servers big or small? If swap
space is considered a safety valve to keep a server up, then I would just as
soon put it on real DASD, and avoid its use with proper memory sizing.
Ray
> -Original Message-
> From: Linux on 390 Port [mailto:linux-...@vm.marist.edu] On
> Behalf Of Marcy Cortes
> Sent: Thursday, June 24, 2010 10:34 AM
> To: LINUX-390@VM.MARIST.EDU
> Subject: Re: Memory use question
>
> So with swappiness higher, Linux is making decsions to
> preemptively move something from memory to vdisk. Well, your
> vdisk is in VM's pageable memory too.
> So moving something from one piece of VM memory to another
> piece of VM memory means both parts will have to become
> resident. The source page probably had already been paged
> out by VM if Linux hadn't been using it recently and the
> vdisk page may not have even existed or if it did since it
> had been used before, it was likely paged out too.
>
> Marcy
--
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Re: Memory use question
> -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 discussions about that one. You do want to probably > set that to zero on a WAS server (and probably others). It's > recommended in this WAS tuning paper too > http://download.boulder.ibm.com/ibmdl/pub/software/dw/linux390 > /perf/ZSW03132USEN.PDF I have trouble seeing whether using memory or v-disk in memory is more effective, though I might have read that VM needs to page more for large seldom referenced v-disk spaces. My natural inclination is to use RAM first and swap last, perhaps based on outdated notions. Anyway I set swappiness to zero. The publication also seems to recommend a heap size that is ~70% of available memory. In our case that would equal 1400M which is 400M more than our current max. setting. Ray -- 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: Memory use question
Rob, Heap size is set to 500M/1000M. I've read recommendations to make default/max the same number, but I would just be guessing at a value. It has grow close to 800M at least once, but it always falls back to around the default size and stays there most of the time. Ray > -Original 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 > wrote: > > > The cache number looks interesting because it remains large > while swap space is being used up. This particular > > instance has been up for 30+ days, so maybe there is > incremental swap space saturation over time? > > Swappiness setting makes Linux swap out process data to retain data in > page cache. It's likely to happen when the JVM heap is too large and > continues to grow. The old stuff never gets referenced and is > eventually swapped out, and then later z/VM will page out that VDISK > again. Still find, until the point where you do a garbage collect and > re-use the heap pages. That requires Linux to swap it in, which means > z/VM must page it in.. etc. > > 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: Memory use question
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 grows from 800M to 1200M RES in that time. I suppose it's also possible we have some WebSphere user code that's not behaving as expected. Ray > -Original Message- > From: Linux on 390 Port [mailto:linux-...@vm.marist.edu] On > Behalf Of Marcy Cortes > Sent: Wednesday, June 23, 2010 11:12 AM > To: LINUX-390@VM.MARIST.EDU > Subject: Re: Memory use question > > > It's called a native memory leak. > Lots of things can cause it. > Thread pools, asynci i/o are two areas where this can happen. > See http://www-01.ibm.com/support/docview.wss?uid=swg21368248 > Also http://www-01.ibm.com/support/docview.wss?uid=swg21373312 > > You may have to open a PMR to get IBM to assist. > > Marcy > -- 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/
Memory use question
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 total, 2041236k used, 9540k free, 120320k buffers Swap: 849964k total, 819676k used,30288k free, 431684k cached rmf: Total memory size 2002MB Swap space size 830MB Total memory used 1507MB % Swap space used 96.4% Used for buffer 117MB Swap-in rate 1.233/s Used for shared 0MB Swap-out rate 0/s Used for cache 422MB Page-in rate 4.933/s Total free memory7MB Page-out rate 35.888/s The cache number looks interesting because it remains large while swap space is being used up. This particular instance has been up for 30+ days, so maybe there is incremental swap space saturation over time? Ray Mrohs U.S. Department of Justice 202-307-6896 -- 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: Configuring networking in zVM under Hercules???
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 those who have an interest in working on VM, by making such environments legally available with certain capacity and usage restrictions. Not to play the devils advocate, but many of the best programmers these days started out honing their skills on inexpensive or "free" resources, and it's a good idea to have them on your side. 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 McKown, John > Sent: Wednesday, June 09, 2010 8:40 AM > To: LINUX-390@VM.MARIST.EDU > Subject: Re: Configuring networking in zVM under Hercules??? > > Nicely put, Alan. And you didn't even mention how foolish it > is to mention having this on this forum. It is liking posting > a question about a pirated copy of Windows on the MSDN forums. > > -- > John McKown > Systems Engineer IV > IT > > Administrative Services Group > > HealthMarkets(r) > > 9151 Boulevard 26 * N. Richland Hills * TX 76010 > (817) 255-3225 phone * (817)-961-6183 cell > john.mck...@healthmarkets.com * www.HealthMarkets.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/
Re: yast procedure for going from SLE-10-s390x-SP2 to SLE-10-s390x-SP3
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 Message- > From: Linux on 390 Port [mailto:linux-...@vm.marist.edu] On > Behalf Of Peter E. Abresch Jr. - at Pepco > Sent: Wednesday, March 03, 2010 5:04 PM > To: LINUX-390@VM.MARIST.EDU > Subject: Re: yast procedure for going from SLE-10-s390x-SP2 > to SLE-10-s390x-SP3 > > Thanks to all that responded. Novell had to delete my mirror > credentials > and regenerate them and Lord and behold, YUP is downloading > my SP3 stuff. > I have since upgraded one of my Linux guest to SP3. > > Peter > -- 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: Mixed CPU environment
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 as long as its understood that the average is not calculated by CPU type. Ray > -Original Message- > From: Linux on 390 Port [mailto:linux-...@vm.marist.edu] On > Behalf Of Marcy Cortes > Sent: Tuesday, March 02, 2010 3:58 PM > To: LINUX-390@VM.MARIST.EDU > Subject: Re: Mixed CPU environment > > Yes, that's correct. You should be good to go (presuming z/VM 5.4). > Average CPU utilization will be screwed up :) - and you'll > have to look at individual IFLs. > > Marcy -- 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
Mixed CPU environment
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 are weighted evenly between the LPARS and uncapped. Are there other configuration items pertaining to mixed workload environments ? Ray Mrohs U.S. Department of Justice 202-307-6896 -- 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: What about these VMSTAT 5 numbers?
The Java heap size in WAS is 512M/1024M. Sizing is based on some ROT from the app vendor so I'm not sure how much leeway there is in making adjustments. Thanks for all the info & pointers so far. Ray Mrohs > -Original Message- > From: Linux on 390 Port [mailto:linux-...@vm.marist.edu] On > Behalf Of Agblad Tore > Sent: Thursday, February 18, 2010 7:25 AM > To: LINUX-390@VM.MARIST.EDU > Subject: Re: What about these VMSTAT 5 numbers? > > Also set the Java Heap as low as possible relative what the > appl needs. > A too big heap just cause problems with cache and longer time for gc. > > Cordialement / Vriendelijke Groeten / Best Regards / Med > Vänliga Hälsningar > Tore Agblad > >Volvo Information Technology >Infrastructure Mainframe Design & Development >SE-405 08, Gothenburg Sweden >E-mail: tore.agb...@volvo.com > >http://www.volvo.com/volvoit/global/en-gb/ > > From: Linux on 390 Port [linux-...@vm.marist.edu] On Behalf > Of Rob van der Heij [rvdh...@velocitysoftware.com] > Sent: Wednesday, February 17, 2010 16:19 > To: LINUX-390@VM.MARIST.EDU > Subject: Re: What about these VMSTAT 5 numbers? > > On Wed, Feb 17, 2010 at 2:49 PM, Mrohs, Ray > 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 is limited > since this is a > > test partition with no VM performance monitoring (yet). > > Thanks for any insight! > > The "wa" column is % of time waiting for I/O. Your vmstat data shows > swapping, so my guess is that you're swapping to real disk and the > process is in I/O wait for the swap-in. So the virtual machine is too > small for this workload. Since this spike happens frequently, it could > be the JVM Garbage Collection going through the entire JVM heap and > force all pages to be swapped in. Your page cache is rather large for > a WAS workload, might be a good thing to lower the swappiness. > Increasing the virtual machine size or adding VDISK for swap would > help, but can't say whether that fits without seeing z/VM data. > > Did I already mention Performance Monitor? Oh, you did ;-) > -- > 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 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
What about these VMSTAT 5 numbers?
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 performance monitoring (yet). Thanks for any insight! procs ---memory-- ---swap-- -io -system-- -cpu-- r b swpd free buff cache si sobibo in cs us sy id wa st 0 0 705900 13764 68928 21667200 026 34 116 0 0 99 1 0 1 0 705900 13764 68944 21665600 057 40 113 0 0 99 0 0 1 0 705900 13764 68960 21664000 0 7 31 116 0 0 100 0 0 0 0 705900 13764 68960 21664000 0 0 30 112 0 0 100 0 0 1 1 705992 7932 70132 215884 14 26 60453 113 174 1 1 84 13 0 1 1 713816 8204 72976 2022800 1602 1082 2455 672 400 3 4 0 93 0 2 1 70 8412 76664 1860840 1786 1156 3903 609 324 56 8 0 8 27 0 2 737324 7672 78936 1703720 3455 5191 815 365 46 10 0 17 27 0 2 740404 8048 74452 1651400 731 1406 2235 528 402 4 5 0 90 0 0 2 740404 8580 59608 16450400 1760 1335 523 274 4 5 1 89 1 0 1 742956 8648 51472 1642200 543 1396 1633 466 330 3 4 0 92 0 0 2 746236 7624 54076 1580360 691 1106 1231 435 299 3 4 0 93 0 0 2 757228 7752 59208 1499560 2358 1458 3316 641 385 4 5 0 89 1 0 2 772684 8248 68164 1324880 3621 2884 5784 1243 439 7 9 0 82 2 0 1 775000 8216 70924 1158040 510 1751 2215 468 386 5 7 0 86 1 1 0 775296 8076 72392 1170880 61 1586 1744 391 506 1 3 65 31 0 1 0 782444 7648 71876 1211160 1478 1649 1839 398 786 1 2 73 24 0 1 1 816952 8480 68908 1262960 8837 1957 8892 1000 1019 1 5 57 35 2 2 1 849964 8056 67108 1328520 8521 1922 8585 855 856 74 7 0 6 13 1 0 849964 8280 62440 1442840 338 3769 500 342 657 18 3 50 26 2 1 0 849960 7680 59932 14992800 201046 314 825 1 2 71 26 0 0 0 849960 8036 57480 15371600 184844 247 633 1 1 82 16 0 0 1 849608 7840 56660 15603620 186234 277 673 2 2 67 29 0 0 1 849576 8144 54008 16110400 179769 189 406 1 1 86 10 1 Ray Mrohs U.S. Department of Justice 202-307-6896 -- 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
Logon password prompt delay
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 a delay. After cloning I changed eth0, HOSTNAME, hosts, resolv.conf, and routes to their new values. nsswitch.conf is the same. I did some experimenting with CA PAM authentication a few months ago, but have since turned it back off. I checked with the z/OS admin to make sure there was nothing coming in from Linux. This is a relatively minor issue, but I want to make sure it doesn't precipitate a bigger problem down the road. Ray Mrohs U.S. Department of Justice 202-307-6896 -- 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: Dasd_diag_mod question
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 NEED swapping, I think the shorter I/O paths could only work in your favor. Still, I'll have to see if I'm comfortable with the number of modifications needed to implement diag, since fba mode works right out of the box. Ray Mrohs -Original Message- From: Linux on 390 Port [mailto:linux-...@vm.marist.edu] On Behalf Of Marcy Cortes Sent: Wednesday, July 29, 2009 7:33 PM To: LINUX-390@VM.MARIST.EDU Subject: Re: Dasd_diag_mod question Question, what is the value of using diag for swapping to vdisk? Even if it is a more efficient driver, you're swapping to memory. How much does it save? And how much swapping would you need to be doing for any savings to be worthwhile? Wouldn't it be simpler to just increase the VM size to an amount that minimizes swapping? Or are there servers you *want* swapping a lot for some reason and if so why? Inquiring minds... Marcy -- 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: Dasd_diag_mod question
Mark, I just tried that and the disks showed up as DIAG. But when I reboot, they are not there: lnxm500:/tmp # swapon -a swapon: cannot stat /dev/dasdf1: No such file or directory swapon: cannot stat /dev/dasdg1: No such file or directory swapon: cannot stat /dev/dasdh1: No such file or directory When I re-run the script with your commands, they show up again: 0.0.0105(DIAG) at ( 94: 20) is dasdf : active at blocksize 512, 25 blocks, 122 MB 0.0.0106(DIAG) at ( 94: 24) is dasdg : active at blocksize 512, 50 blocks, 244 MB 0.0.0107(DIAG) at ( 94: 28) is dasdh : active at blocksize 512, 75 blocks, 366 MB lnxm500:/tmp # swapon -a lnxm500:/tmp # swapon -s FilenameTypeSizeUsed Priority /dev/dasdg1 partition 247912 0 -1 /dev/dasdf1 partition 123948 0 -2 /dev/dasdh1 partition 371872 0 -3 Is this the expected behavior, or should mkinitrd/zipl have made it all transparent? I do see the DIAG DASDS during the mkinitrd process. Ray -Original Message- From: Linux on 390 Port [mailto:linux-...@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" wrote: > Hi All, > > We are running SLES10 SP2, and I am trying to switch our vdisk swap from > fba to diag. So far I: -snip- Ray, Try this: swapoff /dev/dasdh1 dasd_configure 0.0.0107 0 dasd_configure 0.0.0107 1 1 swapon /dev/dasdh1 swapoff /dev/dasdg1 dasd_configure 0.0.0106 0 dasd_configure 0.0.0106 1 1 swapon /dev/dasdg1 swapoff /dev/dasdf1 dasd_configure 0.0.0105 0 dasd_configure 0.0.0105 1 1 swapon /dev/dasdf1 mkinitrd zipl 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: Dasd_diag_mod question
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 to minimize the number and extent of config changes, since I want the Linux images to stay as 'plain vanilla' as possible to reduce future headaches for myself or whoever ends up working on them. Log extract: Creating devices 09:20:24 Loading dasd_mod Loading dasd_diag_mod Loading dasd_eckd_mod dasd(eckd): 0.0.0103: 3390/0C(CU:3990/01) Cyl:10016 Head:15 Sec:224 dasd(eckd): 0.0.0103: (4kB blks): 7211520kB at 48kB/trk compatible disk layout dasdd:VOL1/ 0X0109: 09:20:24 dasdd1 dasdd2 dasd(eckd): 0.0.0100: 3390/0C(CU:3990/01) Cyl:6677 Head:15 Sec:224 dasd(eckd): 0.0.0100: (4kB blks): 4807440kB at 48kB/trk compatible disk layout dasda:VOL1/ 0X0108: dasda1 09:20:24 dasd(eckd): 0.0.0101: 3390/0C(CU:3990/01) Cyl:3338 Head:15 Sec:224 dasd(eckd): 0.0.0101: (4kB blks): 2403360kB at 48kB/trk compatible disk layout dasdb:VOL1/ 0X0101: dasdb1 dasd(eckd): 0.0.0104: 3390/0C(CU:3990/01) Cyl:20 Head:15 Sec:224 dasd(eckd): 0.0.0104: (4kB blks): 14400kB at 48kB/trk compatible disk layout dasde:VOL1/ 0X0104: dasde1 09:20:24 dasd(eckd): 0.0.0102: 3390/0C(CU:3990/01) Cyl:1669 Head:15 Sec:224 dasd(eckd): 0.0.0102: (4kB blks): 1201680kB at 48kB/trk compatible disk layout dasdc:VOL1/ 0X0102: dasdc1 Loading dasd_fba_mod 09:20:24 dasd(fba): 0.0.0105: 9336/10(CU:6310/80) 122MB at(512 B/blk) dasdf:CMS1/ LXSWAP(MDSK): dasdf1 dasd(fba): 0.0.0106: 9336/10(CU:6310/80) 244MB at(512 B/blk) dasdg:CMS1/ LXSWAP(MDSK): dasdg1 dasd(fba): 0.0.0107: 9336/10(CU:6310/80) 366MB at(512 B/blk) dasdh:CMS1/ LXSWAP(MDSK): dasdh1 I'll also try to reactivate the vdisk with the diag option, once I track down the commands for that. Ray -Original Message- From: Linux on 390 Port [mailto:linux-...@vm.marist.edu] On Behalf Of Ron Foster at Baldor-IS Sent: Wednesday, July 29, 2009 11:15 AM To: LINUX-390@VM.MARIST.EDU Subject: Re: Dasd_diag_mod question Ray, When you include dasd_diag_mod in the kernel configuration, did you put the dasd drivers in the correct order? Ours is: INITRD_MODULES="reiserfs dm_mod dasd_diag_mod dasd_eckd_mod dasd_fba_mod" If dasd_fba_mod is first, then the vdisk will always be detected at bootup as fba. Once upon a time, it was also necessary to include the diag information in zipl.conf. dasd=0100,0102-0105,106-107(diag) This was set up some time ago. Since we have gone to SLES10 SP2, I have not tried booting one of our vdisk systems without the diag parameter. 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
Dasd_diag_mod question
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 DASD option to use diag for the vdisk devices (verified in /etc/sysconfig/hardware/*) 4) included the devices in fstab as swap 5) reboot /etc/fstab: /dev/dasdf1 none swap sw 0 0 /dev/dasdg1 none swap sw 0 0 /dev/dasdh1 none swap sw 0 0 Swapon -s: FilenameTypeSizeUsed Priority /dev/dasdf1 partition 123948 0 -1 /dev/dasdg1 partition 247912 0 -2 /dev/dasdh1 partition 371872 0 -3 But the disks still show up like this: 0.0.0105(FBA ) at ( 94: 20) is dasdf : active at blocksize 512, 25 blocks, 122 MB 0.0.0106(FBA ) at ( 94: 24) is dasdg : active at blocksize 512, 50 blocks, 244 MB 0.0.0107(FBA ) at ( 94: 28) is dasdh : active at blocksize 512, 75 blocks, 366 MB How can I figure out what's missing? Any help is appreciated. Ray Mrohs US DOJ -- 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
Test and Production Linux Spaces
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 copy to dedicated production DASDs? Any other gotchas? Thanks. Ray Mrohs US DOJ -- 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: Two Different YaST2 Control Center displays
Thanks again. I'm not sure if Gnome was there originally or snuck in during the SP1 upgrade, but I'm glad its gone. If I knew the characteristics of a Gnome-style screen I would have had a clue! However, supportconfig appears to be a good diagnostic tool in cases like these. Those are good points about the unneeded drivers. If they are small it might not be worth the effort to rebundle and test everything. But if there are lots of them, you get the nickel-and-dime effect. Ray Mrohs -Original Message- From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On Behalf Of Mark Post 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 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? This turned out to be a difference in what RPMs were installed. The "long scrolling list" was from yast2-control-center-gnome package, but there were also 40+ other GNOME RPMs installed. Some applications (Oracle applications among them) require some GNOME components to be installed, but that wasn't the case here. Removing the GNOME RPMs sped things up, and saved some disk space. Mark Post -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] 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 [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Two Different YaST2 Control Center displays
On system A: echo $TERM xterm chkconfig alsasound alsasound on System B has the same responses. Ray Mrohs -Original Message- From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On Behalf Of Stricklin, Raymond J Sent: Monday, August 25, 2008 3:06 PM To: LINUX-390@VM.MARIST.EDU 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 these messages: > > # yast2 > lnxm500:~ # ALSA lib confmisc.c:672:(snd_func_card_driver) > cannot find card '0' On systems A and B, what is the difference in output from these two commands, if any? echo $TERM chkconfig alsasound ok r. -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] 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 [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Two Different YaST2 Control Center displays
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 these messages: # yast2 lnxm500:~ # ALSA lib confmisc.c:672:(snd_func_card_driver) cannot find card '0' ALSA lib conf.c:3492:(_snd_config_evaluate) function snd_func_card_driver returned error: No such device ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings ALSA lib conf.c:3492:(_snd_config_evaluate) function snd_func_concat returned error: No such device ALSA lib confmisc.c:1072:(snd_func_refer) error evaluating name ALSA lib conf.c:3492:(_snd_config_evaluate) function snd_func_refer returned error: No such device ALSA lib conf.c:3961:(snd_config_expand) Evaluate error: No such device ALSA lib pcm.c:2111:(snd_pcm_open_noupdate) Unknown PCM default System B does not get these messages. Both work, but system B looks better and is faster. I can send pictures if you like. Ray Mrohs -Original Message- From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On Behalf Of Mark Post Sent: Thursday, August 21, 2008 5:09 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 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? Did you ever get this figured out? While I can't say I recommend running X or VNC applications on System z, they should still work properly. Mark Post -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] 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 [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Two Different YaST2 Control Center displays
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? -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: What is a good generic disk layout?
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 -Original Message- From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On Behalf Of RPN01 Sent: Tuesday, April 08, 2008 1:36 PM To: LINUX-390@VM.MARIST.EDU Subject: Re: What is a good generic disk layout? We're using the following layout: Allocate the following disks to the Linux guest: * 124 cylinders minimum as device num 391, used as /boot * 10016 cylinders minimum as device num 392, used as vg_system. * 10016 cylinders minimum as device num 393, used as vg_local * ?? cylinders as device numbers 394+, used as vg_app, vg_db, etc. as required by app During the Linux install, allocate the disk as follows: * /dev/dasda1 (391) as /boot * /dev/dasdb1 (392) as LVM vg_system o / - 2.0 gb o /var - 2.5 gb o /tmp - 500 mb o swap - 1 gb * /dev/dasdc1 (393) as LVM vg_local o /home - 2 gb o /opt - 5.4 gb This provides us with a minimal /boot outside of LVM, isolates /var and /tmp from the root file system, and places /home and /opt on its own disk. This leaves us with a disk usage after install somewhat like the following: [EMAIL PROTECTED]:~> df Filesystem 1K-blocks Used Available Use% Mounted on /dev/mapper/vg_system-lv_root 2890692 2074908668944 76% / udev509860 104509756 1% /dev /dev/dasda1 87076 16544 66040 21% /boot /dev/mapper/vg_local-lv_home 2064208 95864 1863488 5% /home /dev/mapper/vg_local-lv_opt 4954828595096 4108036 13% /opt /dev/mapper/vg_system-lv_tmp 495944110616359728 24% /tmp /dev/mapper/vg_system-lv_var 2580272216860 2232340 9% /var [EMAIL PROTECTED]:~> Hope this helps... -- 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 4/8/08 10:31 AM, "Adam Thornton" <[EMAIL PROTECTED]> wrote: > On Apr 8, 2008, at 9:45 AM, Romanowski, John (OFT) wrote: > >> can't you make partition1 dasda1 /boot and partition2 dasda2 the PV >> for >> LVM? > > Sub-partitioning DASD on zSeries is really not a very good idea. > > If you're running under VM, you've already GOT virtualized disk. > > Make /dev/dasda a small /boot parition (so, only give it 80 cylinders > or something) and make /dev/dasdb a bigger volume which you can make > into an LVM PV if you want to. > > Adam -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] 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 [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: curiousity question: Linux usage: many or few
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 complicated when multiple people or groups work on the same image. It would be great to eventually isolate apps and associated utilities onto dedicated file systems that can be copied, detached, reattached, and moved around at will. That would leave the original linux distribution and it's site-specific mods intact. We are 'sort of' there, but not quite. Ray Mrohs -Original Message- From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On Behalf Of Rob van der Heij Sent: Thursday, March 27, 2008 9:30 AM To: LINUX-390@VM.MARIST.EDU Subject: Re: curiousity question: Linux usage: many or few I fully agree that bundling the operating system with the application (as the VMware appliance does) is only good for disposable servers where you don't build data. I use them to kick the tires of a Wiki or some other application. In theory you should be able to take the application data out again and import that into a newer version of the appliance. Back when I was still wearing a systems management hat, we worked on application cloning. Basically when you need a server you get the current operating system image overlaid with the application payload. This avoids the need for N new appliance images each time the operating system is upgraded. With Linux on z/VM it is very easy to bring down the server and inspect the contents of its disks by mounting them elsewhere. When you have kept track of the operating system you put there, you can also tell what has been changed since then. This gives mechanical means to extract the changes and reapply them. Some schools of change management require a full set of development- test- and integration servers for each application. When there is not much change, this gets hard to justify. An installation I worked with wanted a scheme where you would "peel" the application from the server and archive that. The server would then be removed. When the server was needed again, the application "peeling" was re-applied to a fresh current empty server (looking very similar to the production systems that had been running all the time and had operating system fixes applied over time). When you can separate operating system, application layer and application data by nature (with COW file systems) the scheme gets very neat. It also saves you on disk resources and backup requirements. Rob -- Rob van der Heij Velocity Software GmbH http://velocitysoftware.com/ -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] 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 [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Mapping Minidisks to File Systems
We have also been using static lists. I would like to write up instructions for when a customer asks to have a full database restored, and they only know the file system that it sits on. Depending on who is on duty, an admin running restores may or may not have the Linux knowledge to piece together the dasd mapping, especially with LV setups. We will just make sure our lists are up to date, for now. -Original Message- From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On Behalf Of Jose Raul Baron Sent: Tuesday, January 29, 2008 11:17 AM To: LINUX-390@VM.MARIST.EDU Subject: Re: Mapping Minidisks to File Systems We have done this by remarking in the VM directory exactly which minidisks go to which filesystems. It's not so elegant, but it's functional. Saludos / BRGDS José R. Barón Dpto. Sistemas CALCULO S. A. Tel. 91 330 86 44 e-mail: [EMAIL PROTECTED] P No imprima 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 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 -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] 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 [EMAIL PROTECTED] 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 [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Mapping Minidisks to File Systems
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 -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Tomcat startup
Thanks Alan. That turns out to be true. I snooped around, and modified catalina.sh to include jmx.jar in it's classpath. It's working now. Ray Mrohs U.S. Department of Justice 202-307-6896 > -Original Message- > From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On > Behalf Of Fargusson.Alan > Sent: Thursday, August 30, 2007 11:19 AM > To: LINUX-390@VM.MARIST.EDU > Subject: Re: Tomcat startup > > Tomcat does not like to have CLASSPATH set. It basically > ignores it, except it sometimes doesn't, then crashes. This > almost qualifies as a FAQ (actually maybe it is someplace). > > I am not familiar with jmx.jar. If it is something you use > for one application it should be in the .war file (and thus > get put into the directory of the deployed application). If > it is something that you want many applications to use it > needs to go into one of the tomcat common directories. 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@VM.MARIST.EDU > Subject: Tomcat startup > > > 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 CLASSPATH in profile.local. > > I tried running 'sh /etc/profile.local' after boot.local and before > Tomcat is supposed to start, but CLASSPATH still doesn't show > up in env. > I tried starting Tomcat via Yast, chkconfig, and the above > command from > my local /config setup, with the same result. I'm hoping there's a > simple answer to this? > > > > Ray Mrohs > U.S. Department of Justice > 202-307-6896 > > > -- > For LINUX-390 subscribe / signoff / archive access instructions, > send email to [EMAIL PROTECTED] 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 [EMAIL PROTECTED] 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 [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Tomcat startup
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 CLASSPATH in profile.local. I tried running 'sh /etc/profile.local' after boot.local and before Tomcat is supposed to start, but CLASSPATH still doesn't show up in env. I tried starting Tomcat via Yast, chkconfig, and the above command from my local /config setup, with the same result. I'm hoping there's a simple answer to this? Ray Mrohs U.S. Department of Justice 202-307-6896 -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
SSL & firewall mystery
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 now. So I'm wondering if I skipped a step during installation? I don't remember (from earlier this year) doing anything special to enable ssh before, but my memory isn't what it used to be either. %) Ray Mrohs U.S. Department of Justice 202-307-6896 -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Backup and Restore Strategies For Z/Linux
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. 4. Run full / incremental backup or restore. 5. Tell Linux to wake up when it's over. This would also allow easy recovery of dead penguins, as well as take advantage of proven backup tools. Sounds simple on paper at least. Ray Mrohs U.S. Department of Justice 202-307-6896 > -Original Message- > From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On > Behalf Of Eddie Chen > Sent: Friday, June 29, 2007 2:29 PM > To: LINUX-390@VM.MARIST.EDU > Subject: Re: Backup and Restore Strategies For Z/Linux > > I think there is two or more issues, backing up the data > using DDR type > backup only gives you full backup. therefore you need to install/get > software package to do you back. > > The problems are: > >- Many linux server where password changes, many > other thing get > installed on that servers. >- Your not the ADMIN in control of those servers. >- not all servers are the same. and many others... > >If you are lucky, only have few hours to do your > backup, Sunday from > 2am-5am. > > z/VM we perform the clone, is the same as cratering a > golden image or > install linux from a network. The problem is keep track all the > installed software and what was changed > on those servers... /etc/passwd > > . If you lost you "/usr"... the backup you did was just > waste of time > -- you need to boot from "recovery disk", chroot . > > . May be DDR type backup is the best > > .. Boot linux from a "recovery system(disk)" and mount that > filesystem(s) > to correct the problem -- if need, run the restore. > > I know there is a shop(s) that do there install from a "one > servers", > all ADMINs uses(go thru) that servers to install, config... etc to > address this issue . > it seems if there is good maintenance procedures then > recovery is less > pain. > > > > > > "McKown, John" > <[EMAIL PROTECTED] > thmarkets.com> > To > Sent by: Linux LINUX-390@VM.MARIST.EDU > on 390 Port > cc > <[EMAIL PROTECTED] > IST.EDU> > Subject >Re: Backup and Restore > Strategies >For Z/Linux > 06/29/2007 > 11:14 AM > > > Please respond to > Linux on 390 Port > <[EMAIL PROTECTED] > IST.EDU> > > > > > > > > -Original Message- > > From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On > > Behalf Of Paul Noble > > Sent: Friday, June 29, 2007 10:01 AM > > To: LINUX-390@VM.MARIST.EDU > > Subject: Re: Backup and Restore Strategies For Z/Linux > > > > > > So, if I'm understanding this correctly, taking a backup of a > > running Linux system from another LPAR gives you, at best, an > > unreliable backup. > > That's certainly how I read it. > > > > > That means that there are only two viable alternatives: > > > > Shut down Linux and do the backup from another LPAR or, > > Yes. The plus is that you can then restore your Linux environment the > same way that you restore the z/OS or z/VM environment. Also, you can > manage your tapes using your standard tape management software (which > doesn't exist at all on Linux, as I understand it). The minus is > unavailability of the Linux system during this time (which is > shorted by > some sort of "snap shot", if you have that capability) and well as it > being an "all or nothing" DASD level backup / restore, which is not > useful for restoring individual files. > > > > > Use a backup client that runs within Linux and therefore > > participates in its file system processing, getting all the > > current and correct data for the backup. > > Correct. But, again, Linux does not interface to the "normal" tape > management systems used by other System z operating systems. > > > > > Is that about it? > > > > The problem, as I see it, with backing up from another LPAR > > is that there is no incremental or differential backup > > capability. Nor is there any selective restore capability. > > Its an all-or-nothing backup/restore. > > Yea. > > > > > Paul Noble > > Cuyahoga County Information Service Center > > > > -- > John McKown > Senior Systems Programmer > HealthMarkets > Keeping the Promise of Affordable Coverage > Administrative Services Group > Information Technology > > The information contained in this e-mail message may be privileged > and/or confidential. It is for intended addressee(s) only. > I
Re: Used 3480 Tapes
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 > Sent: Monday, May 07, 2007 10:34 AM > To: LINUX-390@VM.MARIST.EDU > Subject: Re: Used 3480 Tapes > > You need an RPQ from IBM. > > >>> [EMAIL PROTECTED] 5/7/2007 10:23 AM >>> > Will they work in my 8 track player ;-) > > James Chaplin > Systems Programmer > (703) 921-6220 > > -- > For LINUX-390 subscribe / signoff / archive access instructions, > send email to [EMAIL PROTECTED] 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 [EMAIL PROTECTED] 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 [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: SLES10 System Registration and Updates
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 PROTECTED] On > Behalf Of Mark Post > Sent: Tuesday, April 24, 2007 2:31 PM > To: LINUX-390@VM.MARIST.EDU > Subject: Re: SLES10 System Registration and Updates > > Ok, let me ask a different question. Replies also off-list, please. > > Has anyone installed SLES10 and gotten update downloads set > up and working? If so, what doc did you read to figure it > out? (My own methods were a mixture of searches and, umm, > empircal.) So far, most of the replies have been "I haven't > tried SLES10 yet," or "I can't figure it out." If there's > some existing doc people found useful, such as the SLES Admin > Guide (or whatever), I'll just summarize from that. > > > Mark Post > Linux Impact Team -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Performance & SLES10
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 Message- > From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On > Behalf Of Karel Gentens > Sent: Tuesday, March 13, 2007 11:33 AM > To: LINUX-390@VM.MARIST.EDU > Subject: Re: Performance & SLES10 > > I expect that by an "agent" you refer to the RMFPMS tool that I've had > installed. > Well, in the mean time, I have shut down the RMFPMS service, > and put the > HZ_TIMER to 0. > There is still a load of around 2% cpu time in performance monitor. > > Does anyone have any other idea? > > Thanx > Karel Gentens > KBC Groep NV > VM - Systemen (CCM1 - CMI) > Egide Walschaertstraat 3, 2800 Mechelen > 015/35.24.52 > 0499/96.53.18 > > [EMAIL PROTECTED] > > > > |-+--> > | | Rob van der Heij | > | | <[EMAIL PROTECTED]| > | | ftware.com>| > | | Sent by: Linux on | > | | 390 Port | > | | <[EMAIL PROTECTED]| > | | T.EDU> | > | | | > | | | > | | 12/03/2007 16:46 | > | | Please respond to | > | | Linux on 390 Port | > |-+--> > > >- > -| > | >| > | To: LINUX-390@VM.MARIST.EDU >| > | cc: >| > | Subject: Re: Performance & SLES10 >| > > >- > -| > > > > > On 3/12/07, Karel Gentens <[EMAIL PROTECTED]> wrote: > > > No, I didn't turn it off yet. > > So, on receiving the mail, I did. > > But I don't see a significant change in the cpu percent utilization. > > Using 2% is not too bad for an active agent. I have heard different > numbers from people who get a few active agents using Java. But 2% > obviously is bad for scalability, so you're limited to monitor the > systems where you expect a problem. ;-) > > This is one reason why we do not use an active agent to measure the > Linux servers. > > And you're right that capture ratio is essential. Just having 25% of > the usage accounted for is not very useful. We certainly aim much > higher than that. I hope your numbers look better when the system is > not idle. > > Rob > -- > Rob van der Heij > Velocity Software, Inc > http://velocitysoftware.com/ > > -- > For LINUX-390 subscribe / signoff / archive access instructions, > send email to [EMAIL PROTECTED] with the message: INFO > LINUX-390 or > visit > http://www.marist.edu/htbin/wlvindex?LINUX-390 > > > > This e-mail and any attached files are confidential and may contain > information which is protected by intellectual property rights. If you > are not the addressee named above any disclosure, > reproduction, copying, > distribution, or other dissemination or use of this communication is > prohibited. If you have received this transmission in error, please > notify the sender immediately and destroy this e-mail. > This e-mail does not contain any professional advice and does not > constitute an offer regarding any financial, banking, > insurance or other > product service toward the addressee. If you like to obtain specific > information, professional advice, an offer, or want to > contract you have > to contact the KBC company mentioned above, its branch or agent. > E-mail transmission cannot be guaranteed to be secure or error free as > information could be intercepted, corrupted, lost, destroyed, arrive > late or incomplete, or contain viruses. The sender therefore does not > accept liability for any errors or omissions in the contents of this > message, and shall have no liability for any loss or damage > suffered by > the user, which arise as a result of e-mail transmission. > > -- > For LINUX-390 subscribe / signoff / archive access instructions, > send email to [EMAIL PROTECTED] with the message: INFO > LINUX-390 or visit >
Re: CMSFS for SLES9 390x
We use the driver to mount the CMS 191 disk, then copy in a configuration setup file, then umount. No one here has looked at the utilities, but something tells me I should. Ray Mrohs Energy Information Administration U.S. Department of Energy -Original Message- From: Post, Mark K [mailto:[EMAIL PROTECTED] Sent: Thursday, January 26, 2006 12:49 PM To: LINUX-390@VM.MARIST.EDU Subject: Re: CMSFS for SLES9 390x As he said, the utilities, cmsfslst, cmsfscat, etc. work, just not the kernel file system driver. Were you using the driver to mount the minidisk, or were you using 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 for any new developments. 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 LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: CMSFS for SLES9 390x
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 WAS under construction is on a backup CD somewhere. Might be in storage. One request that I hope to satisfy soon is for an RPM. But there was a change in core VFS after 2.4.19 which will take some time to assilimilate. Util is fine. Driver has hearburn in 2.6 land. -- R; -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] 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 [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: CMSFS for SLES9 390x
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: LINUX-390@VM.MARIST.EDU Subject: Re: CMSFS for SLES9 390x I'm still in a state of relocation. The code that WAS under construction is on a backup CD somewhere. Might be in storage. One request that I hope to satisfy soon is for an RPM. But there was a change in core VFS after 2.4.19 which will take some time to assilimilate. Util is fine. Driver has hearburn in 2.6 land. -- R; -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] 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 [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
CMSFS for SLES9 390x
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 LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Slim and trim Oracle?
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 -Original Message- From: Tom Duerbusch [mailto:[EMAIL PROTECTED] Sent: Friday, December 16, 2005 2:55 PM To: LINUX-390@VM.MARIST.EDU Subject: Re: Slim and trim Oracle? Thanks I agree that DBCONSOLE take a fair share of memory. It seems to take 50 MB real to startup. But then it seems to also be a webserver amoung other things. I don't want to afford DBCONSOLE eveywhere, just the agent. Perhaps have one Oracle machine with DBCONSOLE collecting all the data from all the other agents. I don't know exactly how that is done, but the doucmentation seems to imply that it can be. Tom Duerbusch THD Consulting >>> [EMAIL PROTECTED] 12/16/2005 1:47 PM >>> PGA target is 24M. I'm not sure how much the SGA size changes. Here is a sample TOP display: CPU states: 42.2% user, 13.8% system, 0.0% nice, 43.8% idle Mem: 346744K av, 338088K used,8656K free, 0K shrd, 2816K buff Swap: 399424K av, 202192K used, 197232K free 246640K cached DBCONSOLE is a hog on our z800 box. Theres no way we can activate that on all our Oracle servers. We plan on using a separate grid server for that function, since the OEM agent is fairly small. Ray Mrohs Energy Information Administration U.S. Department of Energy -Original Message- From: Tom Duerbusch [mailto:[EMAIL PROTECTED] Sent: Friday, December 16, 2005 11:43 AM To: LINUX-390@VM.MARIST.EDU Subject: Re: Slim and trim Oracle? I'm on RSU 501. How did you get an SGA of 225 MB on a 400 MB guest? Is the SGA dynamic? What is your PGA size? Are you using OEM? Do you start DBCONSOLE or just use the agent to an OEM somewhere else? Thanks Tom Duerbusch THD Consulting >>> [EMAIL PROTECTED] 12/16/2005 7:52 AM >>> Tom, What RSU is your system at? Our VM 5.1 paging rates dropped by 2 orders of magnitude when I moved from service level 401 to 502. Regarding Oracle, 9i is running at 350M. We have 10g in test, running at 400M. SGA size is ~225M, but depends a lot on application tuning. Ray Mrohs Energy Information Administration U.S. Department of Energy -Original Message- From: Tom Duerbusch [mailto:[EMAIL PROTECTED] Sent: Thursday, December 15, 2005 9:03 PM To: LINUX-390@VM.MARIST.EDU Subject: Slim and trim Oracle? Next topic. I need to run many, many copies of Oracle 10g under SLES9 under z/VM 5.1. But I need a small memory footprint. Now Oracle suggests a 1 GB memory and 1-2 GB for swap (vdisk in my case). I've been able to install with 512 MB and 1 GB vdisk. But that still ends up taking the 512 MBs, all the time. Even idling and I drive up paging to 2,000 per second, it gets trimmed by less than 5%. I can run SLES9 in 64 MB, without any swapping. ORACLE's OEM, seem to take about 50 MB, just to startup. Then the Oracle database takes the rest of the virtual storage. I've been able to get the Oracle SGA down to 76 MBs which gets my virtual size of Linux down to 320 MBs. Any smaller SGA, seems have Oracle failing just after startup. I don't mind using, perhaps abusing vdisk. I would rather have most of the entire machine paged out when it isn't in use. I might end up having the machines automatically brought down after an hour of unuse, but I would rather not have to write something myself. Of course production machines will be sized for production workloads. What I need is a bunch of departmental development/testing machines, most of them will not be used on any particular day. So, who has the smallest Oracle memory footprint for a full blown Oracle database and how did you get it? Thanks Tom Duerbusch THD Consulting -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] 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 [EMAIL PROTECTED] 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 [EMAIL PROTECTED] 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 [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For LINUX-390 subscribe / signoff / arch
Re: Slim and trim Oracle?
PGA target is 24M. I'm not sure how much the SGA size changes. Here is a sample TOP display: CPU states: 42.2% user, 13.8% system, 0.0% nice, 43.8% idle Mem: 346744K av, 338088K used,8656K free, 0K shrd,2816K buff Swap: 399424K av, 202192K used, 197232K free 246640K cached DBCONSOLE is a hog on our z800 box. Theres no way we can activate that on all our Oracle servers. We plan on using a separate grid server for that function, since the OEM agent is fairly small. Ray Mrohs Energy Information Administration U.S. Department of Energy -Original Message- From: Tom Duerbusch [mailto:[EMAIL PROTECTED] Sent: Friday, December 16, 2005 11:43 AM To: LINUX-390@VM.MARIST.EDU Subject: Re: Slim and trim Oracle? I'm on RSU 501. How did you get an SGA of 225 MB on a 400 MB guest? Is the SGA dynamic? What is your PGA size? Are you using OEM? Do you start DBCONSOLE or just use the agent to an OEM somewhere else? Thanks Tom Duerbusch THD Consulting >>> [EMAIL PROTECTED] 12/16/2005 7:52 AM >>> Tom, What RSU is your system at? Our VM 5.1 paging rates dropped by 2 orders of magnitude when I moved from service level 401 to 502. Regarding Oracle, 9i is running at 350M. We have 10g in test, running at 400M. SGA size is ~225M, but depends a lot on application tuning. Ray Mrohs Energy Information Administration U.S. Department of Energy -Original Message- From: Tom Duerbusch [mailto:[EMAIL PROTECTED] Sent: Thursday, December 15, 2005 9:03 PM To: LINUX-390@VM.MARIST.EDU Subject: Slim and trim Oracle? Next topic. I need to run many, many copies of Oracle 10g under SLES9 under z/VM 5.1. But I need a small memory footprint. Now Oracle suggests a 1 GB memory and 1-2 GB for swap (vdisk in my case). I've been able to install with 512 MB and 1 GB vdisk. But that still ends up taking the 512 MBs, all the time. Even idling and I drive up paging to 2,000 per second, it gets trimmed by less than 5%. I can run SLES9 in 64 MB, without any swapping. ORACLE's OEM, seem to take about 50 MB, just to startup. Then the Oracle database takes the rest of the virtual storage. I've been able to get the Oracle SGA down to 76 MBs which gets my virtual size of Linux down to 320 MBs. Any smaller SGA, seems have Oracle failing just after startup. I don't mind using, perhaps abusing vdisk. I would rather have most of the entire machine paged out when it isn't in use. I might end up having the machines automatically brought down after an hour of unuse, but I would rather not have to write something myself. Of course production machines will be sized for production workloads. What I need is a bunch of departmental development/testing machines, most of them will not be used on any particular day. So, who has the smallest Oracle memory footprint for a full blown Oracle database and how did you get it? Thanks Tom Duerbusch THD Consulting -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] 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 [EMAIL PROTECTED] 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 [EMAIL PROTECTED] 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 [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Slim and trim Oracle?
Tom, What RSU is your system at? Our VM 5.1 paging rates dropped by 2 orders of magnitude when I moved from service level 401 to 502. Regarding Oracle, 9i is running at 350M. We have 10g in test, running at 400M. SGA size is ~225M, but depends a lot on application tuning. Ray Mrohs Energy Information Administration U.S. Department of Energy -Original Message- From: Tom Duerbusch [mailto:[EMAIL PROTECTED] Sent: Thursday, December 15, 2005 9:03 PM To: LINUX-390@VM.MARIST.EDU Subject: Slim and trim Oracle? Next topic. I need to run many, many copies of Oracle 10g under SLES9 under z/VM 5.1. But I need a small memory footprint. Now Oracle suggests a 1 GB memory and 1-2 GB for swap (vdisk in my case). I've been able to install with 512 MB and 1 GB vdisk. But that still ends up taking the 512 MBs, all the time. Even idling and I drive up paging to 2,000 per second, it gets trimmed by less than 5%. I can run SLES9 in 64 MB, without any swapping. ORACLE's OEM, seem to take about 50 MB, just to startup. Then the Oracle database takes the rest of the virtual storage. I've been able to get the Oracle SGA down to 76 MBs which gets my virtual size of Linux down to 320 MBs. Any smaller SGA, seems have Oracle failing just after startup. I don't mind using, perhaps abusing vdisk. I would rather have most of the entire machine paged out when it isn't in use. I might end up having the machines automatically brought down after an hour of unuse, but I would rather not have to write something myself. Of course production machines will be sized for production workloads. What I need is a bunch of departmental development/testing machines, most of them will not be used on any particular day. So, who has the smallest Oracle memory footprint for a full blown Oracle database and how did you get it? Thanks Tom Duerbusch THD Consulting -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] 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 [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Shared maintenance disks
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 then essentially recreating the associated cloned instances via selective disk copy and scripts upon reboot. No shared disks in the plan, but I think the ideal solution is still evolving... Ray Mrohs Energy Information Administration U.S. Department of Energy -Original Message- From: Biggs, Eric J [IT] [mailto:[EMAIL PROTECTED] Sent: Tuesday, December 06, 2005 12:58 PM To: LINUX-390@VM.MARIST.EDU Subject: Shared maintenance disks Has anyone on the list implemented a shared Linux volume scenario where you put maintenance on one guest and then share it amongst all the guests in a read only fashion? Something like that is described in this Redbook: http://www.redbooks.ibm.com/redbooks/pdfs/sg246824.pdf (Part 3). If you have, how does RPM handle things? If you really trusted your own methods and procedures, could you just keep RPM updated on one guest and remove the actual rpm software from all the other ones? This assumes that you would have every guest identical, which may or may not be practical. Just some thoughts... Eric Biggs Sprint Nextel -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] 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 [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: VSWiTCH on SLES8
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 [mailto:[EMAIL PROTECTED] Sent: Thursday, December 01, 2005 7:18 PM To: LINUX-390@VM.MARIST.EDU Subject: VSWiTCH on SLES8 Will SLES8 handle VSWITCH? I've got it working on SLES9-SP2 and I'm going to start converting a lot of servers. How about SLES8? Will it work? What kernel level or SP level do you have to be at if so? "Always do right. This will gratify some people and confound the rest." - Mark Twain Gordon W. Wolfe, Ph.D. 425-865-1495 VM Technical Services, The Boeing Company -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] 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 [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Having Linux tell VM that it has shutdown correctly
Thats good to know - thanks! vmpoff=LOGOFF is only effective during a Linux-initiated shutdown. Ray Mrohs Energy Information Administration U.S. Department of Energy -Original Message- From: Alan Altmark [mailto:[EMAIL PROTECTED] Sent: Monday, November 21, 2005 10:27 AM To: LINUX-390@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 SHUTDOWN. Just let Linux and CP do their thing. CP is waiting for Linux to load a special "shutdown complete" PSW. Alan Altmark z/VM Development IBM Endicott -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] 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 [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Having Linux tell VM that it has shutdown correctly
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: LINUX-390@VM.MARIST.EDU Subject: Having Linux tell VM that it has shutdown correctly I know there is an interface to have VM tell Linux to shutdown. Is there a good way to have VM be told that a guest is shutdown and can be logged off? Our VM people have just given the Linux 10 minutes to respond to a shutdown command. If you're not down, tough. Mostly this seems to be enough time but occasionally one of our WebSphere guests is not all the way down and then the file system gets wonky or some such and repair must be done. I was thinking perhaps with CPINT or something a more two way handshake thing can be done. -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] 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 [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
VSWITCH controller question
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 VSWITCHes. So I think I only need 1 controller in reserve. Any reason to keep controller 3 around? VSWITCH: VM2VSW1 Connections: 16 Controller OSA Dev. -- PRIMARY VM2CTL2 0E04 BACKUP VM2CTL1 3E04 VSWITCH: VM2VSW2 Connections: 3Controller OSA Dev. -- PRIMARY VM2CTL2 2E04 Available controllers: VM2CTL2 VM2CTL1 VM2CTL3 Ray Mrohs Energy Information Administration U.S. Department of Energy -Original Message- From: John Summerfied [mailto:[EMAIL PROTECTED] Sent: Wednesday, November 16, 2005 6:47 PM To: LINUX-390@VM.MARIST.EDU Subject: Re: Windows Server thrashes Novell's Linux Ray Mullins wrote: > Also, Microsoft has the tendency to roll multiple fixes into one patch, > while Linux patches are distributed individually. This was also discussed > earlier when a MS-leaning organization noted that Firefox had more fixes > than IE in the 3rd quarter of this year - but if you counted the individual > fixes in the few Microsoft patches, the scales tipped well in the other > direction. > > So, if each patch has 6 fixes in it on average, then there were 222 real > fixes. (Not that I know actual numbers. > > There's a few other comments that invite "read between the lines", like > "imaginary IT departments". Has anyone read the SI report? Would anyone here, under any circumstances, attempt to upgrade (not update) GLIBC on SLE8 or RHEL 3?* The attempt to do that is the major cause of the Linux failure. The report makes some points which need a sensible response. * I did install glibc fron RHL 6.x on 5.x, but a) It was my personal box b) I knew it was risky behaviour c) I had a backup, so fixing it (I didn't actually have to roll it out) was easy d) I didn't have a boss to shoot me if it broke e) I didn't have a support contract to worry about. -- Cheers John -- spambait [EMAIL PROTECTED] [EMAIL PROTECTED] Tourist pics http://portgeographe.environmentaldisasters.cds.merseine.nu/ do not reply off-list -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] 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 [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Passing parameters to an autologged guest
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 of your server. Ray Mrohs Energy Information Administration U.S. Department of Energy -Original Message- From: James Melin [mailto:[EMAIL PROTECTED] Sent: Wednesday, November 09, 2005 5:13 PM To: LINUX-390@VM.MARIST.EDU Subject: Passing parameters to an autologged guest One more question I am speaking from only minimal understanding since I'm not* the VM person at our shop, however our VM person set up a little prompt at the IPL of z/VM to ask whether or not to IPL the linux guests. If you say yes, it goes and uses XAUTOLOG to IPL those guests. Is it possible to pass a parameter to linux in some fashion that either tells the guest to come up in a different runlevel, or otherwise pass something that can be interrogated during linux startup that tells a script in /etc/init.d to do X or Y depending on the value. Where I'm going with this is to IPL a linux guest in a disaster recovery OR system maintenance situation where I don't want the automatic programmed start of WebSphere to happen because underlying items on z/OS are unavailable (RACFLDAP, DB2, Shadow Direct etc) at the time of z/Linux recovery. -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] 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 [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Poor performance running VM under VM in a DR exercise
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 Message- From: James Melin [mailto:[EMAIL PROTECTED] Sent: Wednesday, November 09, 2005 10:32 AM To: LINUX-390@VM.MARIST.EDU Subject: Poor performance running VM under VM in a DR exercise Hey gang. Weirdness looms. We just got back from a Disaster recovery exercise in which we recovered z/OS resources as well as Linux on z/Series and WebSphere. We ran, basically, under VM for everything on this exercise, including running our VM under a master VM (under which our z/OS images are also running - normally those are native LPAR) There were numerous performance problems on Linux, some of which were solved by removing a virtual coupling facility from the VM guest defined to run our VM environment and this improved things greatly however we didn't get the same performance with Was as we do natively. It is my understanding that you might take a 20% performance hit on a second level VM but we saw like a 150-200% performance hit. Our DR vendor tried to re-create one of our Linux guests on the first level VM for us to try to IPL our guest like we did back home, and that seemed to be faster - though they screwed up the network interfaces so WAS couldn't initialize properly. No LDAP calls to RACF would work, etc. IT DID seem to be more like normal. Normally we can launch 6 Linux guests at IPL and start 5 instances of WebSphere, usually comprising 2 servers per under 2 IFL's and get everything up and running in 30 minutes tops. This pegs the processors for that time but that's to be expected. We had ONE Linux guest start WebSphere 5, and doing one thing at a time, Dmgr, Node agent, server1 then server 2, it took almost 2 hours to launch. (with the virtual CF defined it had taken 3+) The differences between this machine and things back at the ranch were: we run under a 2064-103 + 2 IFL. We were running under a 2064 with 16 native and no IFL processors. The VM guests for our z/OS had 3 processors, no-dedicate (probably meaning the 16 processors were splitting the load) Whereas our VM was running under a guest with 2 processors defined with dedicate. Also, we were not running with a crypto card. I dunno if we had a math co-processor or not, or if that's folded into z/Series now. I know that on the G-5 the math assist processor was a cost feature. My question boils down to: Do you know of any reason that WebSphere would have such horrible performance under VM running under VM? Does WebSphere use the crypto card or some other math co-processor feature for getting stuff out of jar, war and era files? (they are zip readable but are they compressed?) We have two cryptographic coprocessors on our z/900 here, but none on the test machine. I could definitely feel the difference with putty. It was sluggish. Telnet worked just fine. If anyone has advice/suggestions, I'm very interested in hearing them. Thanks -J -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] 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 [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Performance of linux on zVM does not compare to x86
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 those share priorities mean so there are no false expectations. A well-tuned system will often run at 100% CPU and not generate complaints. Ray Mrohs Energy Information Administration U.S. Department of Energy -Original Message- From: Post, Mark K [mailto:[EMAIL PROTECTED] Sent: Monday, November 07, 2005 11:33 AM To: LINUX-390@VM.MARIST.EDU Subject: Re: Performance of linux on zVM does not compare to x86 Yes, compiles are almost 100% CPU intensive tasks. Mainframes are not the best choice for compute intensive tasks, which is why you have to pick your workload carefully. The other applications you talk about, HTTP serving, Web Application serving, email *are* good choices for the mainframe. Database serving in particular can save you a ton of money if you run Oracle, since they license by the machine and price it the same regardless of architecture. Mark Post -Original Message- From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On Behalf Of Miller, Ila Sent: Monday, November 07, 2005 8:48 AM To: LINUX-390@VM.MARIST.EDU Subject: Performance of linux on zVM does not compare to x86 -snip- It appears a compile on any of the linux takes a very long time and compares to a Pentium III processor speed. -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] 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 [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
SLES9 FTP installation hangs
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 new console messages when it hangs, and the server itself is still available. 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 LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Question for Oracle shops
We are running 20 Oracle/Linux VMs across 2 IFLs. The savings with DCSS are not compelling enough with our fairly small number of instances. Larger shops would benefit though. Shared Oracle directories, not supported last time I checked, would be welcomed, but thats a different issue. We gave up on shared /usr because of the complexity involved with patching. As it is, our open systems designers considered every worst-case scenario, hence our images are more bloated than they should be. Our primary goals are simplicity and reliability, and in that regard Oracle and Linux/390 kicks butt. If the appliance images are small enough, sharing wouldn't be a big issue so they can be completely self-contained. Ideally, customers can be OS-agnostic, with just an awareness that Linux is controlling the application, similar to the way Tivo functions at home. As long as there are appropriate hooks (via standardized config) to add user file systems and utilites (backup agents, etc.) it shouldn't matter beyond making sure that whatever is added has the expected support. Similarly for an upgrade or patch, the appliance minidisk would be completely replaced, and the configurator would look for and reapply all user customizations. Maybe put network, swap, and user minidisk/filesystem data in a CMS file to be read at startup. We do something similar to this now. In all cases, the steps would be: DDR restore, configure, go; A hybrid of black-box and custom built server, of sorts. There is so much good stuff out there that should really be coming together. Imagine going to the Oracle website and downloading the latest 10g server appliance DDR image. 8-) Ray Mrohs Energy Information Administration U.S. Department of Energy -Original Message- From: Carsten Otte [mailto:[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 > and > redundant site-specific exercises. Its also our best shot at getting *supported* > read-only shared Linux code. Shared installations are supported today: You can install on a DCSS with xip2fs in Sles8+9, and I think that in the future my execute in place soloution which is in the vanilla kernel tree will also become available on all distributions. On the other hand, doing a shared installation (and maintaining it) requires a skilled system programmer who is willing to dig into this. An appliance-type "inflate an forget" installation would definitely help. -- Carsten Otte IBM Linux technology center ARCH=s390 -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] 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 [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Question for Oracle shops
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 said it today: "Virtual Linux is cool stuff, or it was". My point is, the product is maturing - we know what works and what doesn't work. The good things should be bundled and put out there so a computer generalist armed with basic knowledge can take it and make it go with minimal effort. At this point we are all diverged with highly customized implementations that basically do the same thing. If we can standardize on minidisk addresses, a configuration interface, and capture 95% commonality of what an Oracle (or any) server should provide, and optimize it, that would be a good thing. The rest of the IT world is focusing on standards, and we should be no different. 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 and redundant site-specific exercises. Its also our best shot at getting *supported* read-only shared Linux code. I can see all the pieces out there waiting to be put together, its just a matter of willpower (and yes, legal hurdles). David, see what you started? Ray Mrohs Energy Information Administration U.S. Department of Energy -Original Message- From: Alan Altmark [mailto:[EMAIL PROTECTED] Sent: Wednesday, November 02, 2005 11:17 AM To: LINUX-390@VM.MARIST.EDU Subject: Re: Question for Oracle shops On Wednesday, 11/02/2005 at 09:45 CST, Tom Duerbusch <[EMAIL PROTECTED]> wrote: > This is not only an Oracle problem/concern. Consider what would happen > if IBM picks a "perferred" Linux and bundles it with VM. Replace their > TCPIP product with IP running under Linux for one. A real DB2 running > under VM (yea) for another. But whoever they choose, will be bad news > for the other venders. (I kind of like IBM being neutral on this > onso unlike their history.) Replace our revered stack, with its Ancestral origins, one of the Seven Wonders of the Computing World, with a Linux IP stack? Now go wash your mouth out with soap. Twice. ;-) Alan Altmark z/VM Development IBM Endicott -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] 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 [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Question for Oracle shops
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 installation onto one or two minidisks. The user would provide: 1)network configuration 2)swap area(s) 3)user data space. Upgrades would consist of replacing the appliance disk with a newer release. The advantages would be: 1)tremendous disk space savings 2)a standardized installation and maintenance process that people can actually understand and almost guarantees success 3)a good counter-arguement to moving everything to blades. What are the chances of such a thing happening? Ray Mrohs Energy Information Administration U.S. Department of Energy -Original Message- From: Yu Safin [mailto:[EMAIL PROTECTED] Sent: Tuesday, November 01, 2005 3:19 PM To: LINUX-390@VM.MARIST.EDU Subject: Re: Question for Oracle shops On 10/24/05, Tom Duerbusch <[EMAIL PROTECTED]> wrote: > Just been working on Oracle 10g under SLES9. > > I have been looking over at the Oracle website on their Discussion > Forums. I didn't see anything that was zLinux (i.e. mainframe) > specific. > > So I started doing some searches to see how much discussion there was > on zLinux (nothing under installation, except for my post), and I > started wondering > > Where is everyone else getting help in the Oracle-zLinux world? > > The Linux390 discussion group (here)? > The Oracle website? > Someplace else? > > Thanks > > Tom Duerbusch > THD Consulting > Tom: It has been a night mare trying to install Oracle 10g under Linux for z-Series. No RPM is available. The java based program to install Oracle uses CPU cycles and memory like they are going out of style. Oracle can't find its modules because it doesn't know about lib64 and so on. It is amazing that we pay for Oracle when MySQL drops in place so easily. The IBM RedBook is vague. In short, now I know why Oracle DBA's are paid so well. have you had any success installing? would you be willing to share your experiences in a how-to? we run SLES 9. -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] 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 [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: How to activate DASD in Linux
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 in Linux In SLES9, I use YaST to activate a minidisk that has been just added or linked in. This is OK when I am in multi-user mode. Could someone tell me how to activate a newly added dasd via command line? I came across a script that uses: echo "add range=$2" > /proc/dasd/devices to add the device numeber ($2) but I could not get it to work. I assumed the device number to be 0.0.0200 (where 200 is the minidisk). Perhaps it is something else. Help appreciated. __ Ranga Nathan / CSG Systems Programmer - Specialist; Technical Services; BAX Global Inc. Irvine-California Tel: 714-442-7591 Fax: 714-442-2840 -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] 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 [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: BACULA and AUTOCHANGERS
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, August 31, 2005 7:55 AM To: LINUX-390@VM.MARIST.EDU Subject: BACULA and AUTOCHANGERS Hi all. I'm trying to implement a network backup solution. I'm thinking about using Bacula. I already got it working on other Linux (i586) systems. I'm Running Linux SLES9 under VM and using a IBM 3590 autochanger. I would like to know if there is support to use this autochanger on Linux and hown can I make the autochanger / tape visible to Linux/Bacula. Thanks. Samuel. -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] 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 [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Adding DASD dinamically
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: LINUX-390@VM.MARIST.EDU Subject: Adding DASD dinamically Hi all, is it possible to add DASD devices dinamically? I tried to do it following the instructions on the IBM RedBook Device drivers and Installation Commands anb I could'nt achieve it. Can anyone help me? TIA. . ..: : : : Aristarc Diez : [EMAIL PROTECTED] : : : Tecnico de Sistemas : Tel.: +34.93.2536100: : : COSTAISA S.A. : Ext.: 209 : : : Barcelona : FAX : +34.93.2057917: : :...: :.: -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] 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 [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Oracle 10G POOR performance
Our DBA reviewed this document, and he questions why they would set DB_FILE_MULTIBLOCK_READ_COUNT to 0, since it is only used for full table scans, and read-ahead would be beneficial. Ray Mrohs Energy Information Administration U.S. Department of Energy -Original Message- From: Dave Jones [mailto:[EMAIL PROTECTED] Sent: Wednesday, July 27, 2005 11:09 AM To: LINUX-390@VM.MARIST.EDU Subject: Re: Oracle 10G POOR performance This web site might have some useful information http://www.ibm.com/developerworks/linux/linux390/perf/tuning_rec_database_OracleR ec.html#begin DJ. - Original Message - From: "Mrohs, Ray" <[EMAIL PROTECTED]> To: 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 display to see if anything else > is > running that shouldn't. > > > Ray Mrohs > Energy Information Administration > U.S. Department of Energy > > > -Original Message- > From: Perry, Melissa [mailto:[EMAIL PROTECTED] > Sent: Wednesday, July 27, 2005 9:59 AM > To: LINUX-390@VM.MARIST.EDU > Subject: Re: Oracle 10G POOR performance > > > Ray: > > Optimizer set at All Rows..Is this what you ended up using? > > -Original Message- > From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On Behalf 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 activate it unless its needed. Now > our performance is very comparable to what it was on Oracle 9i. Theres a > slightly bigger memory requirement, and we are now running 400M virtual > servers instead of 350M for single Oracle databases. > > Ray Mrohs > Energy Information Administration > U.S. Department of Energy > > > -Original Message- > From: Perry, Melissa [mailto:[EMAIL PROTECTED] > Sent: Wednesday, July 27, 2005 8:58 AM > To: LINUX-390@VM.MARIST.EDU > Subject: Oracle 10G POOR performance > > > Looking to take the easy way out by just asking question. We are > running Z/vm 5.1, Suse 8, and Oracle 10GJust starting to test > performance..3 oracle queries will bring the IFL to 100%--the IFL > seems to take all of the expanded storage we give it. The Linux guest > is 750M. > > > Unfortunately, I have no oracle knowledgethe oracle people are just > saying performance is awful.They are currently running Oracle 8 in > production on a Risc 7025 with 2 335 M processors and kind of getting > by. It seems there must be something is very wrong over on the IFL. I > am leaning more toward Oracle.Any suggestions? > > -- > For LINUX-390 subscribe / signoff / archive access instructions, send > email to [EMAIL PROTECTED] 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 [EMAIL PROTECTED] 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 [EMAIL PROTECTED] 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 [EMAIL PROTECTED] 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 [EMAIL PROTECTED] 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 [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
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 display to see if anything else is running that shouldn't. Ray Mrohs Energy Information Administration U.S. Department of Energy -Original Message- From: Perry, Melissa [mailto:[EMAIL PROTECTED] Sent: Wednesday, July 27, 2005 9:59 AM To: LINUX-390@VM.MARIST.EDU Subject: Re: Oracle 10G POOR performance Ray: Optimizer set at All Rows..Is this what you ended up using? -Original Message- From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On Behalf 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 activate it unless its needed. Now our performance is very comparable to what it was on Oracle 9i. Theres a slightly bigger memory requirement, and we are now running 400M virtual servers instead of 350M for single Oracle databases. Ray Mrohs Energy Information Administration U.S. Department of Energy -Original Message- From: Perry, Melissa [mailto:[EMAIL PROTECTED] Sent: Wednesday, July 27, 2005 8:58 AM To: LINUX-390@VM.MARIST.EDU Subject: Oracle 10G POOR performance Looking to take the easy way out by just asking question. We are running Z/vm 5.1, Suse 8, and Oracle 10GJust starting to test performance..3 oracle queries will bring the IFL to 100%--the IFL seems to take all of the expanded storage we give it. The Linux guest is 750M. Unfortunately, I have no oracle knowledgethe oracle people are just saying performance is awful.They are currently running Oracle 8 in production on a Risc 7025 with 2 335 M processors and kind of getting by. It seems there must be something is very wrong over on the IFL. I am leaning more toward Oracle.Any suggestions? -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] 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 [EMAIL PROTECTED] 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 [EMAIL PROTECTED] 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 [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
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 activate it unless its needed. Now our performance is very comparable to what it was on Oracle 9i. Theres a slightly bigger memory requirement, and we are now running 400M virtual servers instead of 350M for single Oracle databases. Ray Mrohs Energy Information Administration U.S. Department of Energy -Original Message- From: Perry, Melissa [mailto:[EMAIL PROTECTED] Sent: Wednesday, July 27, 2005 8:58 AM To: LINUX-390@VM.MARIST.EDU Subject: Oracle 10G POOR performance Looking to take the easy way out by just asking question. We are running Z/vm 5.1, Suse 8, and Oracle 10GJust starting to test performance..3 oracle queries will bring the IFL to 100%--the IFL seems to take all of the expanded storage we give it. The Linux guest is 750M. Unfortunately, I have no oracle knowledgethe oracle people are just saying performance is awful.They are currently running Oracle 8 in production on a Risc 7025 with 2 335 M processors and kind of getting by. It seems there must be something is very wrong over on the IFL. I am leaning more toward Oracle.Any suggestions? -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] 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 [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Oracle 10g and SLES8
If anyone is running or testing Oracle 10g in SLES8 s390x, and willing to share performance and configuration info., please contact me off the list. Thanks. 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 LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Signaling VM from Linux
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 -Original Message- From: Samuel Renato Jesus Marques Neves [mailto:[EMAIL PROTECTED] Sent: Thursday, May 05, 2005 5:18 AM To: LINUX-390@VM.MARIST.EDU Subject: Signaling VM from Linux Hi. Here's the background. We're trying to setup a solution to shutdown all Linux Guests in case the UPS starts working on Batteries. For that, we want to have a Linux Guest monitoring the UPS state and reporting to VM so it can issue a Shutdown signal to all the Linux Guests. We've already figured out the part of VM sending the Shutdown signal to the Linux Guests, but we can't solve the rest. How Can it be done? Is there a better way? Thanks. Samuel. -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] 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 [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Can I make LVM by 1 DASD?
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 Mrohs Energy Information Administration U.S. Department of Energy -Original Message- From: Rich Smrcina [mailto:[EMAIL PROTECTED] Sent: Thursday, April 14, 2005 12:31 PM To: LINUX-390@VM.MARIST.EDU Subject: Re: Can I make LVM by 1 DASD? Resizing those filesystems would be easier. But being the VM bigot, I prefer the minidisk approach myself. Adam Thornton wrote: > On Apr 14, 2005, at 11:08 AM, mainframe_s390 wrote: > >> Hi,all >> >> I want to make Logical Volume using only 1 DASD. >> The DASD type is 3390-27type.(about 32000cyls.) >> I will make LV via YaST. >> The 3390-27type DASD will have about 30LVs. >> >> Can I make LVs as above? >> > If you're running VM, you can certainly divide your mod-27 up into a > whole lot of minidisks, and then use them as separate devices. No > Linux-level LVM required. > > If you're not, it might be possible to create a volume group with just > a single extent in it and then divide that into multiple logical > volumes, but I don't see what benefit you would gain from that. > > Adam > > -- > For LINUX-390 subscribe / signoff / archive access instructions, > send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or > visit > http://www.marist.edu/htbin/wlvindex?LINUX-390 > -- Rich Smrcina VM Assist, Inc. Main: (262)392-2026 Cell: (414)491-6001 Ans Service: (866)569-7378 rich.smrcina at vmassist.com Catch the WAVV! http://www.wavv.org WAVV 2005 - Colorado Springs - May 20-24, 2005 -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] 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 [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Samba V3 on zSeries Redpiece
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. I would be interested in seeing a comparison of striped vs non-striped file systems and the effects of an increasing workload specific to Samba. Ray Mrohs Energy Information Administration U.S. Department of Energy -Original Message- From: Ferguson, Neale [mailto:[EMAIL PROTECTED] Sent: Monday, March 21, 2005 8:46 AM To: LINUX-390@VM.MARIST.EDU Subject: Samba V3 on zSeries Redpiece See: http://www.redbooks.ibm.com/redpieces/pdfs/redp3988.pdf This document provides the reader with basic performance rules of thumb for Samba Version 3.0.5 on zSeries Linux and gives background information that can be used in configuring and tuning your Samba V3 environment. The data was developed using an IBM internal workload generator to simulate a heavy transaction load. It identifies the parameters for optimum performance of Samba V3. -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] 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 [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: CPINT Question
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, 2005 10:17 AM To: LINUX-390@VM.MARIST.EDU Subject: Re: CPINT Question On Friday, 03/18/2005 at 07:46 MST, Dave Myers <[EMAIL PROTECTED]> wrote: > Thanks for quick responses. > Adding CLASS B to the linux guests did the trick. Hopefully you have hardened the Linux guests so that you trust them to have class B. Maybe it would be better if the Linux guest HCP MSG'd a server that would ATTACH the requested device (if authorized) to the requestor. Or follow Neale's advice and move ATTACH to a different priv class and have PROP monitor the operator's console to make sure the guest is attaching only what you think it ought to. Alan Altmark z/VM Development IBM Endicott -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] 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 [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Why Zseries
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 interfaces required to network your server farm together. Cables cause 95% of network problems. 3) Simpler disaster recovery specs, planning and exercise. 4) It really is like in that commercial where "someone stole all the servers". :-) Ray Mrohs Energy Information Administration U.S. Department of Energy > -Original Message- > From: Levy, Alan [mailto:[EMAIL PROTECTED] > Sent: Thursday, February 10, 2005 11:03 AM > To: LINUX-390@VM.MARIST.EDU > Subject: Why Zseries > > << File: ATT102814.txt >> << File: image001.jpg >> -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Interesting info for you serious Linux (penguin) types
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 LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Oracle virtual memory sizes
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 standards are very small, but the Oracle response time graphs show good numbers. Setting the right relative share makes a huge impact on performance. Ray Mrohs Energy Information Administration U.S. Department of Energy -Original Message- From: Marcy Cortes [mailto:[EMAIL PROTECTED] Sent: Thursday, February 03, 2005 1:47 PM To: LINUX-390@VM.MARIST.EDU Subject: Oracle virtual memory sizes What are you all using for Oracle virtual machine sizes? This is SLES 8, 31bit, Oracle 9i test/dev instance. I've currently set it up with 512M virtual and 750M swap in 2 v-disks, different priorities.User seems to think that's 2 little and it seems like oracle is occasionally looping. Marcy Cortes (415) 243-6343 "This message may contain confidential and/or privileged information. If you are not the addressee or authorized to receive this for the addressee, you must not use, copy, disclose, or take any action based on this message or any information herein. If you have received this message in error, please advise the sender immediately by reply e-mail and delete this message. Thank you for your cooperation." -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] 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 [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: z/VM commands to Linux guests?
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 booted up properly. 2. The network connection to the instance is available and working. 3. The application itself is operational. There are other monitors readily available with features that would be difficult or impossible to duplicate with an exec. Ray Mrohs Energy Information Administration U.S. Department of Energy -Original Message- From: Peter E. Abresch Jr. - at Pepco [mailto:[EMAIL PROTECTED] Sent: Tuesday, February 01, 2005 10:40 AM To: LINUX-390@VM.MARIST.EDU Subject: z/VM commands to Linux guests? We are writing a REXX exec to run under z/VM to verify the status of our Linux guests. The purpose of this script is to provide an easy mechanism for our operators to verify the health of the Linux guests. Is there a mechanism from z/VM to issue Linux commands to a Linux guest and capturing the output? I know we can go from Linux and issue z/VM commands. Thanks. Peter -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] 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 [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Having 1 linux kernel
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 solutions. Some are really elegant but they look difficult to undo if your needs change, or if part of your penguin farm has to stay back-level for compatibility reasons. But there needs to be a standardized, supportable way to do this to allow everyone to leverage this important advantage. For now, the real beauty of Linux on VM, which I saw from the very beginning, is the ability to quickly restore your production environment at the DR location. Put another way, which would you rather recover: 100 1U servers with their disks/SAN(s) and network infrastructure, or 1 or 2 mainframe partitions? Ray Mrohs Energy Information Administration U.S. Department of Energy -Original Message- From: Noll, Ralph [mailto:[EMAIL PROTECTED] Sent: Wednesday, January 26, 2005 11:00 AM To: LINUX-390@VM.MARIST.EDU Subject: Re: Having 1 linux kernel That's ok... Don't mind each linux guest having r/w to /usr/opt Just want 1 place to upgrade the kernel... If not might as well have 1u servers. Ralph -Original Message- From: Adam Thornton [mailto:[EMAIL PROTECTED] Sent: Wednesday, January 26, 2005 9:34 AM To: LINUX-390@VM.MARIST.EDU Subject: Re: Having 1 linux kernel On Jan 26, 2005, at 8:39 AM, Noll, Ralph wrote: > > Is there any doc on setting up 1 linux kernel and all linux guests > booting from That 1 kernel... > > Right now I have 8 linux guests all with separate boot disks... > > Be nice to have just one.. > You can put the kernel in NSS and then everyone can IPL that shared segment, but that doesn't really get you around needing some per-machine unique r/w DASD. Although with a shared kernel in NSS and smart use of basevol/guestvol, you could probably get a system with minimal writeable DASD. http://www.vm.ibm.com/linux/linuxnss.html tells you how to do the NSS trick. Ignore the "64M is recommended" bit; I've done it successfully in 12M. Do it in the smallest size you're ever going to want to run with. Adam -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] 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 [EMAIL PROTECTED] 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 [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Any caveats moving root filesystem to LVM?
Striping does give you more paths into storage, but I haven't seen any performance studies of striped vs. non-striped LVM disks. If you have fast hardware and FICON, the advantage might not be that great. With striping, you lose the benefit of adding or removing physical volumes dynamically in the volume group (well, you still have to umount the file system briefly), which means you have to plan your file system growth really well, or take a chunk of down time to dump, resize, and reload whenever you need more space. We use the non-striped variety. Ray Mrohs Energy Information 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 is to only use LVM when it's necessary, as in providing more > file system space than one minidisk can provide. There is also some striping value, no? (At least until Linux supports PAV.) -- David Andrews A. Duda and Sons, Inc. [EMAIL PROTECTED] -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] 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 [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Any caveats moving root filesystem to LVM?
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 databases, so if we need to repair one from another Linux, its just a matter of unmounting the existing LVM, and then linking to the disks that need repairs, in which case identical volume and group names don't matter. Yes simple is much better, especially at 3AM! Ray Mrohs Energy Information Administration U.S. Department of Energy -Original Message- From: Romanowski, John (OFT) [mailto:[EMAIL PROTECTED] Sent: Friday, January 21, 2005 12:05 PM To: LINUX-390@VM.MARIST.EDU Subject: Any caveats moving root filesystem to LVM? Anyone have experiences moving root file system to Logical Volume Manager (LVM)? We run SLES8 under VM on S390 with Linux guests cloned from a 2-dasd (3390mod3's) linux image with "/" on one pack and /usr on the other pack. I'd like more flexibility to use the free disk space from each pack as a global pool of free space so I'm evaluating converting the existing Linux file systems to LVM with root file system in LVM. I'm comfortable on how to create the logical volumes and copy the existing Linux file systems into it, but I'm not clear on how the LVM-based Linux will boot up and how I'd "rescue" such systems later if needed. 1) At IPL how will the Suse initrd find the Volume group and mount the root file system? I'm going to change /boot/zipl/parmfile to say "root=/dev/vg/v1" to request the logical volume be mounted as root fs; my /etc/sysconfig/kernel will be coded to load lvm-mod via INITRD_MODULES="jbd ext3 dasd_diag_mod lvm-mod"; and I'll run mkinitrd and zipl. But is that enough to get a logical volume mounted as the root file fs by initrd? 2) After converting to LVM I'll have a bunch of Linux guests whose Volume Group name and logical volume names are identical (as if I'd originally cloned them from an LVM-based Linux image). For rescue purposes, can one of these Linux's CP LINK to and mount another of these Linux's volume groups and volumes given it's already running with the same volume group & volume names itself? Any tips on this are appreciated. -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] 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 [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: 3592 drivers for Linux on zSeries
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 progress: their driver modules did not work right out of the box with the 3592s or VTS, but they do now. The goal here is to provide lights-out enterprise-wide backup using a Linux/390 instance and the automated tape library. Ray Mrohs Energy Information Administration U.S. Department of Energy -Original Message- From: Pieter Harder [mailto:[EMAIL PROTECTED] Sent: Friday, January 14, 2005 3:23 PM To: LINUX-390@VM.MARIST.EDU Subject: Re: 3592 drivers for Linux on zSeries Hello Ray, what kind of attachment are you using for the 3592? FCP of Ficon? Are they in a library of any sort or are they manually operated? You mention BrightStor Enterprise/ARCserve Backup, I assume you use them with that. What are you using for tape management? Also a CA product? Best regards, Pieter Harder [EMAIL PROTECTED] tel +31-73-6837133 / +31-6-47272537 >>> [EMAIL PROTECTED] 14-01-05 19:40 >>> 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: Friday, January 14, 2005 9:20 AM To: LINUX-390@VM.MARIST.EDU Subject: 3592 drivers for Linux on zSeries Hello list, my question is: are there any drivers for 3592 tapes for any Linux on zSeries? I think the answer is no, but I need confirmation of this. Thanks. Best regards, Pieter Harder [EMAIL PROTECTED] tel +31-73-6837133 / +31-6-47272537 -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] 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 [EMAIL PROTECTED] 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 [EMAIL PROTECTED] 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 [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: 3592 drivers for Linux on zSeries
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: Friday, January 14, 2005 9:20 AM To: LINUX-390@VM.MARIST.EDU Subject: 3592 drivers for Linux on zSeries Hello list, my question is: are there any drivers for 3592 tapes for any Linux on zSeries? I think the answer is no, but I need confirmation of this. Thanks. Best regards, Pieter Harder [EMAIL PROTECTED] tel +31-73-6837133 / +31-6-47272537 -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] 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 [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: VMware vs. VM
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. For a comparable feature on the the z, it would be nice to do hot CP/IFL and memory allocation switching via the HMC, as we can with DASD. Ray Mrohs Energy Information Administration U.S. Department of Energy -Original Message- From: Lee Stewart [mailto:[EMAIL PROTECTED] Sent: Friday, December 10, 2004 2:19 PM To: [EMAIL PROTECTED] Subject: Re: VMware vs. VM For example: Over the weekend you're going to update your machine and turn on another IFL -- that requires the entire box VM, LPARs, servers to be shutdown for a POR/IML... Now a VMware Virtual Center (with V-Motion) example: I have to update my 4-way xSeries 445 to an 8-way, which requires the same type of hardware outage. And I have multiple VMware boxes in the shop, all controlled by Virtual Center. I can migrate the running Windows or Linux servers off the box I need to update, onto various other boxes while the update is being done, then back to the updated server -- all without ever taking the servers down. No outage from the customer or application point of view. All assuming you have the processor and memory capacity available to hold the workload on the other machines. (Keep in mind if you're running say 6 servers, those 6 could be moved to 6 different servers to spread the load.) It would be analogous to taking a running Linux user under VM and migrating it to another zSeries box on the fly without taking the Linux user down. VM and zSeries is good, but it can't do that -- at least yet. Lee At 11:57 AM 12/10/2004, you wrote: > > VMware can do things that VM can't... Imagine >taking a > running active server and dynamically >moving it to > another physical processor -- >never missing a beat. > > > >What type of scenerio would this be useful on zSeries >hardware? I thought IBM indicates it to have a mean >up time of 99.999%. > > >__ >Do You Yahoo!? >Tired of spam? Yahoo! Mail has the best spam protection around >http://mail.yahoo.com > >-- >For LINUX-390 subscribe / signoff / archive access instructions, >send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit >http://www.marist.edu/htbin/wlvindex?LINUX-390 Lee Stewart, Senior SE Sirius Enterprise Systems Group (719) 566-0188 , Fax (309) 410-5363 [EMAIL PROTECTED] www.siriuscom.com -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] 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 [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Effect of LIMITSOFT vs NOLIMIT?
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 benefit. Documentation I have read so far indicate that CPU will be limited unless unused resources are available, which seems to be the same as NOLIMIT, where other servers are getting their allocated minimums satisfied first. I'm sure its more involved - can anyone expand on this? 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 LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
