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
