Doesn't IBM also allow software capping to a lower capacity than the slowest uniprocessor through the operating system?
On Wed, May 18, 2022 at 5:54 AM Timothy Sipples <sipp...@sg.ibm.com> wrote: > > Andrew Rowley wrote: > >It would benefit customers, software vendors and IBM if IBM could get > >these small systems onto more reasonably sized hardware. We get a > >certain pleasure from extracting everything possible from a small > >system, but in reality it's not productive work. > > That’s been happening, actually. Take a look at the minimum configurable CP > (general purpose processor) “PCIs” per IBM’s LSPR data: > > z10BC: 25 > z114: 26 > zBC12: 50 > z13s: 80 > z14 ZR1: 88 > z15 T02: 98* > > As I recall the Multiprise 2000 went down as low as ~3.5 PCIs. So over > roughly 25 years it’s been about 3.5 to 98 PCIs as the minimum available CP > configuration, or about a 28X increase. Insert the usual caveats that “PCI” > comparisons are perilous, particularly over this broad range of machines. > > IBM doesn’t mandate configuring a zIIP in part because z/VSE and VSEn cannot > use a zIIP. But IBM generally recommends configuring at least one zIIP if you > run z/OS. zIIPs are (or were) available for all of these models and also for > the z9BC. > > * As Marna mentioned the IBM z15 models have System Recovery Boost. The IBM > z15 T02 capacity model A01 would actually run equivalently to a Z01 capacity > model during System Recovery Boost (60 minutes), or with even greater > capacity if equipped with a zIIP. An IBM z15 T02 capacity model Z01 has a PCI > rating of 1,761. > > — — — — — > Timothy Sipples > Senior Architect > Digital Assets, Industry Solutions, and Cyber Security > IBM zSystems and LinuxONE > sipp...@sg.ibm.com > > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN -- Mike A Schwab, Springfield IL USA Where do Forest Rangers go to get away from it all? ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
