Re: Q STOR command results
Alan thanks for the thoughtful response it is much appreciated!! Thank You, Terry Martin Lockheed Martin CMS - CITIC 3300 Lord Baltimore Drive, Suite 200, 21244 Engineering Computing Mainframe Support Cell - 443 632-4191 -Original Message- From: The IBM z/VM Operating System [mailto:IBMVM@LISTSERV.UARK.EDU] On Behalf Of Alan Altmark Sent: Monday, August 08, 2011 1:36 AM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: Q STOR command results On Friday, 08/05/2011 at 02:31 EDT, Martin, Terry R. (CMS/CTR) (CTR) terry.mar...@cms.hhs.gov wrote: Does the RESERVE work the same for z/OS? Yes. This isn't an OS-specific phenomenon. As Bruce indicated, when you identify memory as reserved in the image profile, it's just a reservation. No guarantees that you're going to get it. Memory that is configured on the box and is available to satisfy reservations is detected by the OS as standby. As the various LPARs bring standby memory online, the standby pool is drained. If you see STANDBY fall below your RESERVED amount, then you better hurry. During POR, you can actually see the transition of memory from RESERVED to STANDBY. LPARs are activated as soon as a chunk of central storage has passed POR checks. While the LPAR is activating, the hardware continues validating memory, activating LPARs as it goes. Eventually, it stops activating LPARs, and the remainder of the memory is validated and placed in the STANDBY pool. This process takes time, so beware that VARY STORAGE may fail when issued immediately after POR since the standby pool may not yet be full enough to satisfy your request. Alan Altmark Senior Managing z/VM and Linux Consultant IBM System Lab Services and Training ibm.com/systems/services/labservices office: 607.429.3323 mobile; 607.321.7556 alan_altm...@us.ibm.com IBM Endicott
Re: Q STOR command results
On Friday, 08/05/2011 at 02:31 EDT, Martin, Terry R. (CMS/CTR) (CTR) terry.mar...@cms.hhs.gov wrote: Does the RESERVE work the same for z/OS? Yes. This isn't an OS-specific phenomenon. As Bruce indicated, when you identify memory as reserved in the image profile, it's just a reservation. No guarantees that you're going to get it. Memory that is configured on the box and is available to satisfy reservations is detected by the OS as standby. As the various LPARs bring standby memory online, the standby pool is drained. If you see STANDBY fall below your RESERVED amount, then you better hurry. During POR, you can actually see the transition of memory from RESERVED to STANDBY. LPARs are activated as soon as a chunk of central storage has passed POR checks. While the LPAR is activating, the hardware continues validating memory, activating LPARs as it goes. Eventually, it stops activating LPARs, and the remainder of the memory is validated and placed in the STANDBY pool. This process takes time, so beware that VARY STORAGE may fail when issued immediately after POR since the standby pool may not yet be full enough to satisfy your request. Alan Altmark Senior Managing z/VM and Linux Consultant IBM System Lab Services and Training ibm.com/systems/services/labservices office: 607.429.3323 mobile; 607.321.7556 alan_altm...@us.ibm.com IBM Endicott
Re: Q STOR command results
I don't know.. Maybe someone here does, or ask on IBM-MAIN. On Fri, Aug 5, 2011 at 2:31 PM, Martin, Terry R. (CMS/CTR) (CTR) terry.mar...@cms.hhs.gov wrote: Bruce, Does the RESERVE work the same for z/OS? Thank You, Terry Martin Lockheed Martin CMS - CITIC 3300 Lord Baltimore Drive, Suite 200, 21244 Engineering Computing Mainframe Support Cell - 443 632-4191 -- Bruce Hayden z/VM and Linux on System z ATS IBM, Endicott, NY
Re: Q STOR command results
Alan, When you add up all of the RESERVE memory for all LPARS does it need to add up to or below the amount of available unused memory or can each LPAR be defined the max amount of memory that is available and unused? Thank You, Terry Martin Lockheed Martin CMS - CITIC 3300 Lord Baltimore Drive, Suite 200, 21244 Engineering Computing Mainframe Support Cell - 443 632-4191 -Original Message- From: The IBM z/VM Operating System [mailto:IBMVM@LISTSERV.UARK.EDU] On Behalf Of Alan Altmark Sent: Thursday, August 04, 2011 10:20 AM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: Q STOR command results On Thursday, 08/04/2011 at 10:06 EDT, Richard Baek rb...@bbandt.com wrote: We're trying to add additional storage to some of our zVM LPARs without IPLing the system. : Anyone have any idea what we might be doing wrong ? You need to change the LPAR image profile to have some amount of storage defined as reserved. If you don't do that, the LPAR can't see the unused memory on the box. So make that change, then repeat the deactivation/reactivation sequence. Note that you can set the Reserved value to a maximum value, even if all that memory isn't on the box. Then you can specify how much of that reserved memory CP will bring online. Alan Altmark Senior Managing z/VM and Linux Consultant IBM System Lab Services and Training ibm.com/systems/services/labservices office: 607.429.3323 mobile; 607.321.7556 alan_altm...@us.ibm.com IBM Endicott
Re: Q STOR command results
If you want to allow any LPAR to grab all of the unused memory, then you can set the reserve memory to the available unused memory in all LPARs. What is actually available will show up as STANDBY storage in z/VM and the rest as RESERVED. Note that the amount of STANDBY displayed may be the same on all LPARs, because the same unused storage pool is available to all the LPARs. On Fri, Aug 5, 2011 at 9:39 AM, Martin, Terry R. (CMS/CTR) (CTR) terry.mar...@cms.hhs.gov wrote: Alan, When you add up all of the RESERVE memory for all LPARS does it need to add up to or below the amount of available unused memory or can each LPAR be defined the max amount of memory that is available and unused? Thank You, Terry Martin Lockheed Martin CMS - CITIC 3300 Lord Baltimore Drive, Suite 200, 21244 Engineering Computing Mainframe Support Cell - 443 632-4191 -Original Message- From: The IBM z/VM Operating System [mailto:IBMVM@LISTSERV.UARK.EDU] On Behalf Of Alan Altmark Sent: Thursday, August 04, 2011 10:20 AM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: Q STOR command results On Thursday, 08/04/2011 at 10:06 EDT, Richard Baek rb...@bbandt.com wrote: We're trying to add additional storage to some of our zVM LPARs without IPLing the system. : Anyone have any idea what we might be doing wrong ? You need to change the LPAR image profile to have some amount of storage defined as reserved. If you don't do that, the LPAR can't see the unused memory on the box. So make that change, then repeat the deactivation/reactivation sequence. Note that you can set the Reserved value to a maximum value, even if all that memory isn't on the box. Then you can specify how much of that reserved memory CP will bring online. Alan Altmark Senior Managing z/VM and Linux Consultant IBM System Lab Services and Training ibm.com/systems/services/labservices office: 607.429.3323 mobile; 607.321.7556 alan_altm...@us.ibm.com IBM Endicott -- Bruce Hayden z/VM and Linux on System z ATS IBM, Endicott, NY
Re: Q STOR command results
Bruce, Does the RESERVE work the same for z/OS? Thank You, Terry Martin Lockheed Martin CMS - CITIC 3300 Lord Baltimore Drive, Suite 200, 21244 Engineering Computing Mainframe Support Cell - 443 632-4191 -Original Message- From: The IBM z/VM Operating System [mailto:IBMVM@LISTSERV.UARK.EDU] On Behalf Of Bruce Hayden Sent: Friday, August 05, 2011 11:39 AM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: Q STOR command results If you want to allow any LPAR to grab all of the unused memory, then you can set the reserve memory to the available unused memory in all LPARs. What is actually available will show up as STANDBY storage in z/VM and the rest as RESERVED. Note that the amount of STANDBY displayed may be the same on all LPARs, because the same unused storage pool is available to all the LPARs. On Fri, Aug 5, 2011 at 9:39 AM, Martin, Terry R. (CMS/CTR) (CTR) terry.mar...@cms.hhs.gov wrote: Alan, When you add up all of the RESERVE memory for all LPARS does it need to add up to or below the amount of available unused memory or can each LPAR be defined the max amount of memory that is available and unused? Thank You, Terry Martin Lockheed Martin CMS - CITIC 3300 Lord Baltimore Drive, Suite 200, 21244 Engineering Computing Mainframe Support Cell - 443 632-4191 -Original Message- From: The IBM z/VM Operating System [mailto:IBMVM@LISTSERV.UARK.EDU] On Behalf Of Alan Altmark Sent: Thursday, August 04, 2011 10:20 AM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: Q STOR command results On Thursday, 08/04/2011 at 10:06 EDT, Richard Baek rb...@bbandt.com wrote: We're trying to add additional storage to some of our zVM LPARs without IPLing the system. : Anyone have any idea what we might be doing wrong ? You need to change the LPAR image profile to have some amount of storage defined as reserved. If you don't do that, the LPAR can't see the unused memory on the box. So make that change, then repeat the deactivation/reactivation sequence. Note that you can set the Reserved value to a maximum value, even if all that memory isn't on the box. Then you can specify how much of that reserved memory CP will bring online. Alan Altmark Senior Managing z/VM and Linux Consultant IBM System Lab Services and Training ibm.com/systems/services/labservices office: 607.429.3323 mobile; 607.321.7556 alan_altm...@us.ibm.com IBM Endicott -- Bruce Hayden z/VM and Linux on System z ATS IBM, Endicott, NY
Q STOR command results
We're trying to add additional storage to some of our zVM LPARs without IPLing the system. According to the zVM CP Commands manual for zVM 6.1 t he Q STOR command should show STANDBY storage. And Standby storage is defin ed as. Standby storage is a calculated value based on the amount of installed storage that is not currently claimed by active logical partitions and th e reserved storage specified for the logical partition in which z/VM is running. We deactivated our LPAR and removed 5 GB from the configuration, reactivated the LPAR and reIPLed. The Q STOR command still shows 0GB of standby storage. We have additional storage installed on the box above t he 5 GB we just freed up. q stor STORAGE = 2G CONFIGURED = 2G INC = 256M STANDBY = 0 RESERVED = 0 Ready; T=0.01/0.01 09:52:45 Anyone have any idea what we might be doing wrong ?
Re: Q STOR command results
On Thursday, 08/04/2011 at 10:06 EDT, Richard Baek rb...@bbandt.com wrote: We're trying to add additional storage to some of our zVM LPARs without IPLing the system. : Anyone have any idea what we might be doing wrong ? You need to change the LPAR image profile to have some amount of storage defined as reserved. If you don't do that, the LPAR can't see the unused memory on the box. So make that change, then repeat the deactivation/reactivation sequence. Note that you can set the Reserved value to a maximum value, even if all that memory isn't on the box. Then you can specify how much of that reserved memory CP will bring online. Alan Altmark Senior Managing z/VM and Linux Consultant IBM System Lab Services and Training ibm.com/systems/services/labservices office: 607.429.3323 mobile; 607.321.7556 alan_altm...@us.ibm.com IBM Endicott
Re: Q STOR command results
So, if I have 32GB of memory installed on a CEC, and my LPAR is defined with storage of 8GB with an additional 8GB of Reserved storage, the displ ay should then show as follows? q stor STORAGE = 8G CONFIGURED = 8G INC = 256M STANDBY = 16G RESERVED = 8G Ready; T=0.01/0.01 09:52:45 And I should be able to add both the 8G of reserved and the 16G of standb y using the SET STOR command.
Re: Q STOR command results
No.. If you define the LPAR reserved at 8 GB, then the standby+reserved will only show 8 GB. In other words, 8 GB is the maximum amount you can dynamically add to this LPAR. Standby storage is memory that is available on your box that is currently not assigned to any LPAR. It can change if LPARs are activated or deactivated or other LPARs dynamically chance their storage. In your case, if the Standby storage goes below 8 GB (meaning that your box has less than 8 GB of unassigned storage), the excess will show up as Reserved storage. Reserved is storage that is currently not available to be added to your LPAR. On Thu, Aug 4, 2011 at 11:25 AM, Richard Baek rb...@bbandt.com wrote: So, if I have 32GB of memory installed on a CEC, and my LPAR is defined with storage of 8GB with an additional 8GB of Reserved storage, the display should then show as follows? q stor STORAGE = 8G CONFIGURED = 8G INC = 256M STANDBY = 16G RESERVED = 8G Ready; T=0.01/0.01 09:52:45 And I should be able to add both the 8G of reserved and the 16G of standby using the SET STOR command. -- Bruce Hayden z/VM and Linux on System z ATS IBM, Endicott, NY
