Dynamic CPU ADD to a z/OS lpar
I am in the middle of a CBU test and was wondering if it is possible on z/OS yet to dynamically add (config or otherwise) a CP or two to an lpar *without* that partition already having any specified as reserved in their activation profile. A friend said yes, but I was unable locate how using the HMC. Bob -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Re: Dynamic CPU ADD to a z/OS lpar
On Tue, 10 May 2016 16:56:32 -0400, Richards, Robert B. wrote: >I am in the middle of a CBU test and was wondering if it is possible on z/OS >yet to dynamically add (config or otherwise) a CP or two to an lpar *without* >that partition already having any specified as reserved in their activation >profile. A friend said yes, but I was unable locate how using the HMC. > >Bob I didn't see a response to this. It would be "Logical Processor Add " under Operational Customization for the LPAR, but you need (digging back in memory now) z10 and z/OS 1.10.I assume you meet the requirements by now. :-) Best regards, Mark -- Mark Zelden - Zelden Consulting Services - z/OS, OS/390 and MVS ITIL v3 Foundation Certified mailto:m...@mzelden.com Mark's MVS Utilities: http://www.mzelden.com/mvsutil.html Systems Programming expert at http://search390.techtarget.com/ateExperts/ -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Re: Dynamic CPU ADD to a z/OS lpar
I am quite sure, at least for the z196, that you can online config CPs online, if they have been defined as Reserved. To do so, you must change the LPAR profile and de/reactivate the LPAR. So dynamically, in a running z/OS: no. Kees. -Original Message- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf Of Mark Zelden Sent: 11 May, 2016 19:09 To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: Dynamic CPU ADD to a z/OS lpar On Tue, 10 May 2016 16:56:32 -0400, Richards, Robert B. wrote: >I am in the middle of a CBU test and was wondering if it is possible on z/OS >yet to dynamically add (config or otherwise) a CP or two to an lpar *without* >that partition already having any specified as reserved in their activation >profile. A friend said yes, but I was unable locate how using the HMC. > >Bob I didn't see a response to this. It would be "Logical Processor Add " under Operational Customization for the LPAR, but you need (digging back in memory now) z10 and z/OS 1.10.I assume you meet the requirements by now. :-) Best regards, Mark -- Mark Zelden - Zelden Consulting Services - z/OS, OS/390 and MVS ITIL v3 Foundation Certified mailto:m...@mzelden.com Mark's MVS Utilities: http://www.mzelden.com/mvsutil.html Systems Programming expert at http://search390.techtarget.com/ateExperts/ -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN For information, services and offers, please visit our web site: http://www.klm.com. This e-mail and any attachment may contain confidential and privileged material intended for the addressee only. If you are not the addressee, you are notified that no part of the e-mail or any attachment may be disclosed, copied or distributed, and that any other action related to this e-mail or attachment is strictly prohibited, and may be unlawful. If you have received this e-mail by error, please notify the sender immediately by return e-mail, and delete this message. Koninklijke Luchtvaart Maatschappij NV (KLM), its subsidiaries and/or its employees shall not be liable for the incorrect or incomplete transmission of this e-mail or any attachments, nor responsible for any delay in receipt. Koninklijke Luchtvaart Maatschappij N.V. (also known as KLM Royal Dutch Airlines) is registered in Amstelveen, The Netherlands, with registered number 33014286 -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Re: Dynamic CPU ADD to a z/OS lpar
On 05/12/2016 08:33 AM, Vernooij, CP (ITOPT1) - KLM wrote: > I am quite sure, at least for the z196, that you can online config CPs > online, if they have been defined as Reserved. To do so, you must change the > LPAR profile and de/reactivate the LPAR. So dynamically, in a running z/OS: > no. > > Kees. With all newer machines there is a "logical CPU add" that can add CPUs even if reserved == 0. You will be asked if that should happen for the running system, the profile or both. These CPUs appear then as reserved and can be configured on from the operating system. At least that works with Linux and a z196 and IFLs, so I assume z/OS should be able to do then same. Christian -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Re: Dynamic CPU ADD to a z/OS lpar
Yes, I meet the requirements. :-) I found the logical processor add and proved it works as advertised. The only surprise was the lack of ability to decrement processors without a deactivate. Thanks for responding. Bob -Original Message- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf Of Mark Zelden Sent: Wednesday, May 11, 2016 1:09 PM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: Dynamic CPU ADD to a z/OS lpar On Tue, 10 May 2016 16:56:32 -0400, Richards, Robert B. wrote: >I am in the middle of a CBU test and was wondering if it is possible on z/OS >yet to dynamically add (config or otherwise) a CP or two to an lpar *without* >that partition already having any specified as reserved in their activation >profile. A friend said yes, but I was unable locate how using the HMC. > >Bob I didn't see a response to this. It would be "Logical Processor Add " under Operational Customization for the LPAR, but you need (digging back in memory now) z10 and z/OS 1.10.I assume you meet the requirements by now. :-) Best regards, Mark -- Mark Zelden - Zelden Consulting Services - z/OS, OS/390 and MVS ITIL v3 Foundation Certified mailto:m...@mzelden.com Mark's MVS Utilities: http://www.mzelden.com/mvsutil.html Systems Programming expert at http://search390.techtarget.com/ateExperts/ -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Re: Dynamic CPU ADD to a z/OS lpar
I can assure all that it works to ADD with reserved = 0 and without Activate/Deactivate. Once you add with "change running system", you issue a CONFIG CPU command and "Voila!", instant capacity increase. Don't forget that I am currently running a CBU test and had the extra physical processors available but unassigned to any of the normal activation profiles. I do have a follow-up question Is anyone aware of a downside to over specifying reserved CPs? Bob -Original Message- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf Of Christian Borntraeger Sent: Thursday, May 12, 2016 7:10 AM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: Dynamic CPU ADD to a z/OS lpar On 05/12/2016 08:33 AM, Vernooij, CP (ITOPT1) - KLM wrote: > I am quite sure, at least for the z196, that you can online config CPs > online, if they have been defined as Reserved. To do so, you must change the > LPAR profile and de/reactivate the LPAR. So dynamically, in a running z/OS: > no. > > Kees. With all newer machines there is a "logical CPU add" that can add CPUs even if reserved == 0. You will be asked if that should happen for the running system, the profile or both. These CPUs appear then as reserved and can be configured on from the operating system. At least that works with Linux and a z196 and IFLs, so I assume z/OS should be able to do then same. Christian -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Re: Dynamic CPU ADD to a z/OS lpar
Bob, the last refuge of a scoundrel / ignoramous is "control blocks". :-) I'd be concerned only if they were below the line. "PCCA" comes to mind but I might've just made that up. :-) Cheers, Martin Martin Packer, zChampion, Principal Systems Investigator, Worldwide Cloud & Systems Performance, IBM +44-7802-245-584 email: martin_pac...@uk.ibm.com Twitter / Facebook IDs: MartinPacker Blog: https://www.ibm.com/developerworks/mydeveloperworks/blogs/MartinPacker Podcast Series (With Marna Walle): https://developer.ibm.com/tv/category/mpt/ From: "Richards, Robert B." To: IBM-MAIN@LISTSERV.UA.EDU Date: 12/05/2016 12:30 Subject:Re: Dynamic CPU ADD to a z/OS lpar Sent by:IBM Mainframe Discussion List I can assure all that it works to ADD with reserved = 0 and without Activate/Deactivate. Once you add with "change running system", you issue a CONFIG CPU command and "Voila!", instant capacity increase. Don't forget that I am currently running a CBU test and had the extra physical processors available but unassigned to any of the normal activation profiles. I do have a follow-up question Is anyone aware of a downside to over specifying reserved CPs? Bob -Original Message- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf Of Christian Borntraeger Sent: Thursday, May 12, 2016 7:10 AM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: Dynamic CPU ADD to a z/OS lpar On 05/12/2016 08:33 AM, Vernooij, CP (ITOPT1) - KLM wrote: > I am quite sure, at least for the z196, that you can online config CPs online, if they have been defined as Reserved. To do so, you must change the LPAR profile and de/reactivate the LPAR. So dynamically, in a running z/OS: no. > > Kees. With all newer machines there is a "logical CPU add" that can add CPUs even if reserved == 0. You will be asked if that should happen for the running system, the profile or both. These CPUs appear then as reserved and can be configured on from the operating system. At least that works with Linux and a z196 and IFLs, so I assume z/OS should be able to do then same. Christian -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN Unless stated otherwise above: IBM United Kingdom Limited - Registered in England and Wales with number 741598. Registered office: PO Box 41, North Harbour, Portsmouth, Hampshire PO6 3AU -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Re: Dynamic CPU ADD to a z/OS lpar
Decrement would be more complicated, especially if there were work running on the supernumary ones. I learnt "decrement is harder than increment" with PAGEDEL being later than PAGEADD. Also with DB2 Buffer Pool Dynamic sizing. I believe the slightly less than polite term is "evacuation". :-) Cheers, Martin Martin Packer, zChampion, Principal Systems Investigator, Worldwide Cloud & Systems Performance, IBM +44-7802-245-584 email: martin_pac...@uk.ibm.com Twitter / Facebook IDs: MartinPacker Blog: https://www.ibm.com/developerworks/mydeveloperworks/blogs/MartinPacker Podcast Series (With Marna Walle): https://developer.ibm.com/tv/category/mpt/ From: "Richards, Robert B." To: IBM-MAIN@LISTSERV.UA.EDU Date: 12/05/2016 12:21 Subject: Re: Dynamic CPU ADD to a z/OS lpar Sent by:IBM Mainframe Discussion List Yes, I meet the requirements. :-) I found the logical processor add and proved it works as advertised. The only surprise was the lack of ability to decrement processors without a deactivate. Thanks for responding. Bob -Original Message- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf Of Mark Zelden Sent: Wednesday, May 11, 2016 1:09 PM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: Dynamic CPU ADD to a z/OS lpar On Tue, 10 May 2016 16:56:32 -0400, Richards, Robert B. wrote: >I am in the middle of a CBU test and was wondering if it is possible on z/OS yet to dynamically add (config or otherwise) a CP or two to an lpar *without* that partition already having any specified as reserved in their activation profile. A friend said yes, but I was unable locate how using the HMC. > >Bob I didn't see a response to this. It would be "Logical Processor Add " under Operational Customization for the LPAR, but you need (digging back in memory now) z10 and z/OS 1.10.I assume you meet the requirements by now. :-) Best regards, Mark -- Mark Zelden - Zelden Consulting Services - z/OS, OS/390 and MVS ITIL v3 Foundation Certified mailto:m...@mzelden.com Mark's MVS Utilities: http://www.mzelden.com/mvsutil.html Systems Programming expert at http://search390.techtarget.com/ateExperts/ -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN Unless stated otherwise above: IBM United Kingdom Limited - Registered in England and Wales with number 741598. Registered office: PO Box 41, North Harbour, Portsmouth, Hampshire PO6 3AU -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Re: Dynamic CPU ADD to a z/OS lpar
You can add CPs or memory to an active LPAR, but you can't take either away without stopping the LPAR. You don't want more CPs assigned than you (or PR/SM) can use...it's just overhead. In fact, unused CPs will be "parked" on newer CECs when underutilized. -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Re: Dynamic CPU ADD to a z/OS lpar
Although this is not an HMC task I find I can either add or take away a CP on an individual LPAR with the following MVS command. CF CPU(1),OFFLINE< Puts one CP offline in this case CP #1 CF CPU(2),ONLINE< Puts one CP online in this case CP #2 -Original Message- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf Of Jon Butler Sent: Thursday, May 12, 2016 10:34 AM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: Dynamic CPU ADD to a z/OS lpar You can add CPs or memory to an active LPAR, but you can't take either away without stopping the LPAR. You don't want more CPs assigned than you (or PR/SM) can use...it's just overhead. In fact, unused CPs will be "parked" on newer CECs when underutilized. -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Re: Dynamic CPU ADD to a z/OS lpar
I’m not sure what the problem is with removing active CPs. At the start of a CBU window, extra CPs are made available in the hardware. If a system is newly IPLed at that point, it will see all available CPs defined in the Image profile. If a system is already running when CBU is activated, additional CPs must be configured online by MVS command. At the end of a CBU window, an LPAR may be deactivated if desired, or the extra CPs may simply be configured offline by MVS command, at which point the OS will no longer 'see' the removal of CBU CPs. This is fully dynamic. There is (only?) one clue in the OS that CBU has been started or stopped. WLM issues a message about a capacity change upon either adding or removing CP(s). That message should be highlighted in everyone's automation and broadcast in some way because it can also occur in the case of a hardware problem. We once had an internal cooling problem that caused CPU degradation in the box. We got the same WLM message. Likewise storage may be configured on or offline dynamically if and only if it has been defined at IPL as RECONFIGURABLE. . . . J.O.Skip Robinson Southern California Edison Company Electric Dragon Team Paddler SHARE MVS Program Co-Manager 323-715-0595 Mobile 626-302-7535 Office robin...@sce.com -Original Message- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf Of Jon Butler Sent: Thursday, May 12, 2016 7:34 AM To: IBM-MAIN@LISTSERV.UA.EDU Subject: (External):Re: Dynamic CPU ADD to a z/OS lpar You can add CPs or memory to an active LPAR, but you can't take either away without stopping the LPAR. You don't want more CPs assigned than you (or PR/SM) can use...it's just overhead. In fact, unused CPs will be "parked" on newer CECs when underutilized -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Re: Dynamic CPU ADD to a z/OS lpar
This and the post it replies to suggests we might be getting muddied in our terminology. I think the original post was about DEFINING engines, rather than parking them or varying them on and offline. Cheers, Martin Martin Packer, zChampion, Principal Systems Investigator, Worldwide Cloud & Systems Performance, IBM +44-7802-245-584 email: martin_pac...@uk.ibm.com Twitter / Facebook IDs: MartinPacker Blog: https://www.ibm.com/developerworks/mydeveloperworks/blogs/MartinPacker Podcast Series (With Marna Walle): https://developer.ibm.com/tv/category/mpt/ From: "Warren, Cliff" To: IBM-MAIN@LISTSERV.UA.EDU Date: 12/05/2016 16:41 Subject: Re: Dynamic CPU ADD to a z/OS lpar Sent by:IBM Mainframe Discussion List Although this is not an HMC task I find I can either add or take away a CP on an individual LPAR with the following MVS command. CF CPU(1),OFFLINE< Puts one CP offline in this case CP #1 CF CPU(2),ONLINE< Puts one CP online in this case CP #2 -Original Message- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf Of Jon Butler Sent: Thursday, May 12, 2016 10:34 AM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: Dynamic CPU ADD to a z/OS lpar You can add CPs or memory to an active LPAR, but you can't take either away without stopping the LPAR. You don't want more CPs assigned than you (or PR/SM) can use...it's just overhead. In fact, unused CPs will be "parked" on newer CECs when underutilized. -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN Unless stated otherwise above: IBM United Kingdom Limited - Registered in England and Wales with number 741598. Registered office: PO Box 41, North Harbour, Portsmouth, Hampshire PO6 3AU -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Re: Dynamic CPU ADD to a z/OS lpar
On Thu, 12 May 2016 07:30:03 -0400, Richards, Robert B. wrote: >I do have a follow-up question Is anyone aware of a downside to over >specifying reserved CPs? LCCA/PCCA storage. But the default CBLOC has been VIRTUAL31 since z/OS 1.12. Even if you are still overriding it to below the line it shouldn't be a problem unless you are reserving a large number (FSVO large) and have 24-bit issues already in your common / pvt storage. Regards, Mark -- Mark Zelden - Zelden Consulting Services - z/OS, OS/390 and MVS ITIL v3 Foundation Certified mailto:m...@mzelden.com Mark's MVS Utilities: http://www.mzelden.com/mvsutil.html Systems Programming expert at http://search390.techtarget.com/ateExperts/ -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Re: Dynamic CPU ADD to a z/OS lpar
On 5/12/2016 10:17 AM, Mark Zelden wrote: LCCA/PCCA storage. But the default CBLOC has been VIRTUAL31 since z/OS 1.12. Even if you are still overriding it to below the line it shouldn't be a problem unless you are reserving a large number (FSVO large) and have 24-bit issues already in your common / pvt storage. Not just virtual; there is also a good deal of real storage wasted if too many CPUs are reserved. That's one reason why MVS lowered the default DYNCPADD count to 16 starting in z/OS 2.1. Before that, the value was _all_ CPUs that could be configured to the LPAR i.e., the max supported by z/OS or the number actually on the box, whichever was lower... -- Edward E Jaffe Phoenix Software International, Inc 831 Parkview Drive North El Segundo, CA 90245 http://www.phoenixsoftware.com/ -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Re: Dynamic CPU ADD to a z/OS lpar
On 5/12/2016 10:17 AM, Mark Zelden wrote: On Thu, 12 May 2016 07:30:03 -0400, Richards, Robert B. wrote: I do have a follow-up question Is anyone aware of a downside to over specifying reserved CPs? LCCA/PCCA storage. But the default CBLOC has been VIRTUAL31 since z/OS 1.12. Even if you are still overriding it to below the line it shouldn't be a problem unless you are reserving a large number (FSVO large) and have 24-bit issues already in your common / pvt storage. Not true. LCCA/PCCA storage is only allocated for a CP when a CP is logically online. The maximum number of CPs is dependent on the value of CVTMAXMP that is set when z/OS IPL's. This value effects the size of many other control blocks, including, but not limited to, the LCCAVT and the PCCAVT. Which is why CVTMAXMP can not be increased dynamically. While over specifying reserved CPs does have an impact on storage usage, it is a *minor* impact until the CPs are actually brought online to z/OS. So don't worry about over specifying the value. Greg -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Re: Dynamic CPU ADD to a z/OS lpar
Greg, In your opinion, would it be okay to specify a reserve value to all partition profiles that equals the highest number of CPs that my CBU records allow? This would allow for total flexibility of CP assignment to any or all lpars. In my case, it would also apply to a second set of backup partitions on an opposing CPC for data center failover capability. Bob -Original Message- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf Of Greg Dyck Sent: Thursday, May 12, 2016 1:42 PM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: Dynamic CPU ADD to a z/OS lpar On 5/12/2016 10:17 AM, Mark Zelden wrote: > On Thu, 12 May 2016 07:30:03 -0400, Richards, Robert B. > wrote: > >> I do have a follow-up question Is anyone aware of a downside to over >> specifying reserved CPs? > > LCCA/PCCA storage. But the default CBLOC has been VIRTUAL31 since z/OS > 1.12. Even > if you are still overriding it to below the line it shouldn't be a > problem unless you are reserving a large number (FSVO large) and have 24-bit > issues already in your common / pvt storage. Not true. LCCA/PCCA storage is only allocated for a CP when a CP is logically online. The maximum number of CPs is dependent on the value of CVTMAXMP that is set when z/OS IPL's. This value effects the size of many other control blocks, including, but not limited to, the LCCAVT and the PCCAVT. Which is why CVTMAXMP can not be increased dynamically. While over specifying reserved CPs does have an impact on storage usage, it is a *minor* impact until the CPs are actually brought online to z/OS. So don't worry about over specifying the value. Greg -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Re: Dynamic CPU ADD to a z/OS lpar
On 5/13/2016 4:07 AM, Richards, Robert B. wrote: ... would it be okay to specify a reserve value to all partition profiles that equals the highest number of CPs that my CBU records allow? This would allow for total flexibility of CP assignment to any or all lpars. In my case, it would also apply to a second set of backup partitions on an opposing CPC for data center failover capability. That's precisely the behavior you get when you specify 'DYNCPADD ENABLE' rather than 'DYNCPADD ' in LOADxx: www.ibm.com/support/knowledgecenter/SSLTBW_2.2.0/com.ibm.zos.v2r2.ieae200/stpldx.htm When you specify ENABLE, z/OS prepares to dynamically add the smaller of the following: o Highest CPU/core ID the hardware supports o Highest CPU/core ID the z/OS release supports. This is followed by, "IBM® recommends specifying to avoid allocating CPU/core-related storage for CPUs/cores that will never be dynamically added for the life of the IPL." -- Edward E Jaffe Phoenix Software International, Inc 831 Parkview Drive North El Segundo, CA 90245 http://www.phoenixsoftware.com/ -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Re: Dynamic CPU ADD to a z/OS lpar
Furthermore, even in 2.1, if the parameter is not specified (we do not), the default is 16 for . That's plenty for us. . . . J.O.Skip Robinson Southern California Edison Company Electric Dragon Team Paddler SHARE MVS Program Co-Manager 323-715-0595 Mobile 626-302-7535 Office robin...@sce.com -Original Message- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf Of Ed Jaffe Sent: Friday, May 13, 2016 7:49 AM To: IBM-MAIN@LISTSERV.UA.EDU Subject: (External):Re: Dynamic CPU ADD to a z/OS lpar On 5/13/2016 4:07 AM, Richards, Robert B. wrote: > ... would it be okay to specify a reserve value to all partition profiles > that equals the highest number of CPs that my CBU records allow? > > This would allow for total flexibility of CP assignment to any or all lpars. > In my case, it would also apply to a second set of backup partitions on an > opposing CPC for data center failover capability. That's precisely the behavior you get when you specify 'DYNCPADD ENABLE' rather than 'DYNCPADD ' in LOADxx: www.ibm.com/support/knowledgecenter/SSLTBW_2.2.0/com.ibm.zos.v2r2.ieae200/stpldx.htm When you specify ENABLE, z/OS prepares to dynamically add the smaller of the following: o Highest CPU/core ID the hardware supports o Highest CPU/core ID the z/OS release supports. This is followed by, "IBM® recommends specifying to avoid allocating CPU/core-related storage for CPUs/cores that will never be dynamically added for the life of the IPL." -- Edward E Jaffe Phoenix Software International, Inc 831 Parkview Drive North El Segundo, CA 90245 http://www.phoenixsoftware.com/ -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
