Adding memory dynamically to a RHEL6.5 guest running under z/VM 6.3
Hi I have a couple of guests that I need to add memory to without recycling the guests. What are the steps and commands to accomplish this? Thanks, Terry -- 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: Adding memory dynamically to a RHEL6.5 guest running under z/VM 6.3
It is not possible to change the memory allocated to a guest without logging off and logging on again. On Thu, Oct 2, 2014 at 9:36 AM, Martin, Terry Contractor terry.mar...@ssa.gov wrote: Hi I have a couple of guests that I need to add memory to without recycling the guests. What are the steps and commands to accomplish this? Thanks, Terry -- 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/ -- The postings on this site are my own and don’t necessarily represent Mainline’s positions or opinions Mark D Pace Senior Systems Engineer Mainline Information Systems -- 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: Adding memory dynamically to a RHEL6.5 guest running under z/VM 6.3
Terry, Do you have STANDBY memory defined in the virtual machines? There is a section, 26.2 Set up memory hotplugging in The Virtualization Cookbook for IBM z/VM 6.3, RHEL 6.4, and SLES 11 SP3 on the Web at http://www.redbooks.ibm.com/abstracts/sg248147.html Hope it helps. -Mike M. On Thu, Oct 2, 2014 at 9:36 AM, Martin, Terry Contractor terry.mar...@ssa.gov wrote: Hi I have a couple of guests that I need to add memory to without recycling the guests. What are the steps and commands to accomplish this? Thanks, Terry -- 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: Adding memory dynamically to a RHEL6.5 guest running under z/VM 6.3
One way is to have standby memory defined. For example, if you have user LINUX and want to have 512MB with the chance to go up to 2G, then you add the 2G as max memory on the USER directory statement: USER LINUX PASWD 512M 2048M G 64 Then add the following statement to the user directory to define the remaining memory as standby: COMMAND DEFINE STORAGE AS 512M STANDBY 1536M If you set up the user like this, then from inside the Linux guest you can add memory at run time with the chmem command. For example, to add extra 512 M run: chmem -e 512M Note that it is not always possible to return the standby memory that you have once allocated without re-ipling the guest. -- 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: Adding memory dynamically to a RHEL6.5 guest running under z/VM 6.3
Ok, thanks for the information. I will plan the memory on the guests accordingly. -Original Message- From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of Pavelka, Tomas Sent: Thursday, October 02, 2014 9:52 AM To: LINUX-390@VM.MARIST.EDU Subject: Re: Adding memory dynamically to a RHEL6.5 guest running under z/VM 6.3 One way is to have standby memory defined. For example, if you have user LINUX and want to have 512MB with the chance to go up to 2G, then you add the 2G as max memory on the USER directory statement: USER LINUX PASWD 512M 2048M G 64 Then add the following statement to the user directory to define the remaining memory as standby: COMMAND DEFINE STORAGE AS 512M STANDBY 1536M If you set up the user like this, then from inside the Linux guest you can add memory at run time with the chmem command. For example, to add extra 512 M run: chmem -e 512M Note that it is not always possible to return the standby memory that you have once allocated without re-ipling the guest. -- 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: Adding memory dynamically to a RHEL6.5 guest running under z/VM 6.3
Thanks Mike. I will take a look. One question I assume that if you allocate the Standby memory in the guest Directory that it won't count against the memory footprint until some of that standby is used is that correct? -Original Message- From: Linux on 390 Port [mailto:LINUX-390@vm.marist.edu] On Behalf Of Michael MacIsaac Sent: Thursday, October 02, 2014 9:49 AM To: LINUX-390@vm.marist.edu Subject: Re: Adding memory dynamically to a RHEL6.5 guest running under z/VM 6.3 Terry, Do you have STANDBY memory defined in the virtual machines? There is a section, 26.2 Set up memory hotplugging in The Virtualization Cookbook for IBM z/VM 6.3, RHEL 6.4, and SLES 11 SP3 on the Web at http://www.redbooks.ibm.com/abstracts/sg248147.html Hope it helps. -Mike M. On Thu, Oct 2, 2014 at 9:36 AM, Martin, Terry Contractor terry.mar...@ssa.gov wrote: Hi I have a couple of guests that I need to add memory to without recycling the guests. What are the steps and commands to accomplish this? Thanks, Terry -- 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: Adding memory dynamically to a RHEL6.5 guest running under z/VM 6.3
Terry, Yes, I believe (but have never proven it). -Mike On Thu, Oct 2, 2014 at 10:00 AM, Martin, Terry Contractor terry.mar...@ssa.gov wrote: Thanks Mike. I will take a look. One question I assume that if you allocate the Standby memory in the guest Directory that it won't count against the memory footprint until some of that standby is used is that correct? -Original Message- From: Linux on 390 Port [mailto:LINUX-390@vm.marist.edu] On Behalf Of Michael MacIsaac Sent: Thursday, October 02, 2014 9:49 AM To: LINUX-390@vm.marist.edu Subject: Re: Adding memory dynamically to a RHEL6.5 guest running under z/VM 6.3 Terry, Do you have STANDBY memory defined in the virtual machines? There is a section, 26.2 Set up memory hotplugging in The Virtualization Cookbook for IBM z/VM 6.3, RHEL 6.4, and SLES 11 SP3 on the Web at http://www.redbooks.ibm.com/abstracts/sg248147.html Hope it helps. -Mike M. On Thu, Oct 2, 2014 at 9:36 AM, Martin, Terry Contractor terry.mar...@ssa.gov wrote: Hi I have a couple of guests that I need to add memory to without recycling the guests. What are the steps and commands to accomplish this? Thanks, Terry -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/ -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/ -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/
Re: Adding memory dynamically to a RHEL6.5 guest running under z/VM 6.3
Terry, You are right. Standby memory will not be allocated until you put it online on Linux. Here we use to have all machines with a couple GB of standby memory (and a couple processors too), so we can change it quickly when needed. We have SLES11 here, and we can put memory online AND offline without having to IPL the guest. The same for CPU. Mauro http://mauro.limeiratem.com - registered Linux User: 294521 Scripture is both history, and a love letter from God. 2014-10-02 11:26 GMT-03:00 Michael MacIsaac mike99...@gmail.com: Terry, Yes, I believe (but have never proven it). -Mike On Thu, Oct 2, 2014 at 10:00 AM, Martin, Terry Contractor terry.mar...@ssa.gov wrote: Thanks Mike. I will take a look. One question I assume that if you allocate the Standby memory in the guest Directory that it won't count against the memory footprint until some of that standby is used is that correct? -Original Message- From: Linux on 390 Port [mailto:LINUX-390@vm.marist.edu] On Behalf Of Michael MacIsaac Sent: Thursday, October 02, 2014 9:49 AM To: LINUX-390@vm.marist.edu Subject: Re: Adding memory dynamically to a RHEL6.5 guest running under z/VM 6.3 Terry, Do you have STANDBY memory defined in the virtual machines? There is a section, 26.2 Set up memory hotplugging in The Virtualization Cookbook for IBM z/VM 6.3, RHEL 6.4, and SLES 11 SP3 on the Web at http://www.redbooks.ibm.com/abstracts/sg248147.html Hope it helps. -Mike M. On Thu, Oct 2, 2014 at 9:36 AM, Martin, Terry Contractor terry.mar...@ssa.gov wrote: Hi I have a couple of guests that I need to add memory to without recycling the guests. What are the steps and commands to accomplish this? Thanks, Terry -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/ -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/ -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/ -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/
Re: Adding memory dynamically to a RHEL6.5 guest running under z/VM 6.3
My apologies for being wrong about this. On Thu, Oct 2, 2014 at 9:46 AM, Mark Pace pacemainl...@gmail.com wrote: It is not possible to change the memory allocated to a guest without logging off and logging on again. On Thu, Oct 2, 2014 at 9:36 AM, Martin, Terry Contractor terry.mar...@ssa.gov wrote: Hi I have a couple of guests that I need to add memory to without recycling the guests. What are the steps and commands to accomplish this? Thanks, Terry -- 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/ -- The postings on this site are my own and don’t necessarily represent Mainline’s positions or opinions Mark D Pace Senior Systems Engineer Mainline Information Systems -- The postings on this site are my own and don’t necessarily represent Mainline’s positions or opinions Mark D Pace Senior Systems Engineer Mainline Information Systems -- 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: Adding memory dynamically to a RHEL6.5 guest running under z/VM 6.3
Thanks guys!
-Original Message-
From: Linux on 390 Port [mailto:LINUX-390@vm.marist.edu] On Behalf Of Mauro
Souza
Sent: Thursday, October 02, 2014 10:44 AM
To: LINUX-390@vm.marist.edu
Subject: Re: Adding memory dynamically to a RHEL6.5 guest running under z/VM 6.3
Terry,
You are right. Standby memory will not be allocated until you put it online on
Linux. Here we use to have all machines with a couple GB of standby memory (and
a couple processors too), so we can change it quickly when needed.
We have SLES11 here, and we can put memory online AND offline without having to
IPL the guest. The same for CPU.
Mauro
http://mauro.limeiratem.com - registered Linux User: 294521 Scripture is both
history, and a love letter from God.
2014-10-02 11:26 GMT-03:00 Michael MacIsaac mike99...@gmail.com:
Terry,
Yes, I believe (but have never proven it).
-Mike
On Thu, Oct 2, 2014 at 10:00 AM, Martin, Terry Contractor
terry.mar...@ssa.gov wrote:
Thanks Mike. I will take a look. One question I assume that if you
allocate the Standby memory in the guest Directory that it won't
count against the memory footprint until some of that standby is
used is that correct?
-Original Message-
From: Linux on 390 Port [mailto:LINUX-390@vm.marist.edu] On Behalf
Of Michael MacIsaac
Sent: Thursday, October 02, 2014 9:49 AM
To: LINUX-390@vm.marist.edu
Subject: Re: Adding memory dynamically to a RHEL6.5 guest running
under z/VM 6.3
Terry,
Do you have STANDBY memory defined in the virtual machines?
There is a section, 26.2 Set up memory hotplugging in The
Virtualization
Cookbook for IBM z/VM 6.3, RHEL 6.4, and SLES 11 SP3 on the Web at
http://www.redbooks.ibm.com/abstracts/sg248147.html
Hope it helps.
-Mike M.
On Thu, Oct 2, 2014 at 9:36 AM, Martin, Terry Contractor
terry.mar...@ssa.gov wrote:
Hi
I have a couple of guests that I need to add memory to without
recycling the guests. What are the steps and commands to
accomplish
this?
Thanks,
Terry
--
For LINUX-390 subscribe / signoff / archive access
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--
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-- For LINUX-390 subscribe / signoff / archive access instructions,
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LINUX-390 or
visit
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--
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email to lists...@vm.marist.edu with the message: INFO LINUX-390 or
visit
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http://wiki.linuxvm.org/
--
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Re: Adding memory dynamically to a RHEL6.5 guest running under z/VM 6.3
Mark, No problem! -Original Message- From: Linux on 390 Port [mailto:LINUX-390@vm.marist.edu] On Behalf Of Mark Pace Sent: Thursday, October 02, 2014 10:49 AM To: LINUX-390@vm.marist.edu Subject: Re: Adding memory dynamically to a RHEL6.5 guest running under z/VM 6.3 My apologies for being wrong about this. On Thu, Oct 2, 2014 at 9:46 AM, Mark Pace pacemainl...@gmail.com wrote: It is not possible to change the memory allocated to a guest without logging off and logging on again. On Thu, Oct 2, 2014 at 9:36 AM, Martin, Terry Contractor terry.mar...@ssa.gov wrote: Hi I have a couple of guests that I need to add memory to without recycling the guests. What are the steps and commands to accomplish this? Thanks, Terry - - 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/ -- The postings on this site are my own and don’t necessarily represent Mainline’s positions or opinions Mark D Pace Senior Systems Engineer Mainline Information Systems -- The postings on this site are my own and don’t necessarily represent Mainline’s positions or opinions Mark D Pace Senior Systems Engineer Mainline Information Systems -- 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: Adding memory dynamically to a RHEL6.5 guest running under z/VM 6.3
On Thursday, 10/02/2014 at 09:37 EDT, Martin, Terry Contractor terry.mar...@ssa.gov wrote: I have a couple of guests that I need to add memory to without recycling the guests. What are the steps and commands to accomplish this? If you didn't plan for it in advance, you can't do it. See Managing Hotplug Memory in the Linux Device Driver and Command Reference. Alan Altmark Senior Managing z/VM and Linux Consultant Lab Services System z Delivery Practice IBM Systems Technology Group ibm.com/systems/services/labservices office: 607.429.3323 mobile; 607.321.7556 alan_altm...@us.ibm.com IBM Endicott -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For more information on Linux on System z, visit http://wiki.linuxvm.org/
Re: Adding memory dynamically to a RHEL6.5 guest running under z/VM 6.3
I'm not sure what Terry means by won't count against the memory footprint. Standby and reserved storage is included in the calculations to determine whether a live guest relocation will put the target member at risk for running out of page space. See the help files for messages HCP1811I and HCP1813I. Dennis O'Brien They may take our lives, but they'll never take our freedom! -- Mel Gibson as William Wallace, in Braveheart -Original Message- From: Linux on 390 Port [mailto:LINUX-390@vm.marist.edu] On Behalf Of Martin, Terry Contractor Sent: Thursday, October 02, 2014 07:00 To: LINUX-390@vm.marist.edu Subject: Re: Adding memory dynamically to a RHEL6.5 guest running under z/VM 6.3 Thanks Mike. I will take a look. One question I assume that if you allocate the Standby memory in the guest Directory that it won't count against the memory footprint until some of that standby is used is that correct? -Original Message- From: Linux on 390 Port [mailto:LINUX-390@vm.marist.edu] On Behalf Of Michael MacIsaac Sent: Thursday, October 02, 2014 9:49 AM To: LINUX-390@vm.marist.edu Subject: Re: Adding memory dynamically to a RHEL6.5 guest running under z/VM 6.3 Terry, Do you have STANDBY memory defined in the virtual machines? There is a section, 26.2 Set up memory hotplugging in The Virtualization Cookbook for IBM z/VM 6.3, RHEL 6.4, and SLES 11 SP3 on the Web at http://www.redbooks.ibm.com/abstracts/sg248147.html Hope it helps. -Mike M. On Thu, Oct 2, 2014 at 9:36 AM, Martin, Terry Contractor terry.mar...@ssa.gov wrote: Hi I have a couple of guests that I need to add memory to without recycling the guests. What are the steps and commands to accomplish this? Thanks, Terry -- 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/ -- This message, and any attachments, is for the intended recipient(s) only, may contain information that is privileged, confidential and/or proprietary and subject to important terms and conditions available at http://www.bankofamerica.com/emaildisclaimer. If you are not the intended recipient, please delete this message.
