Indeed so. Also, IBM's zPCR modeling tool (and a related tool that sales reps and business partners have access to) can do these kinds of calculations.
On Fri, Jun 12, 2026 at 9:58 AM Phil Smith III <[email protected]> wrote: > In theory, MSUs are the right answer, because they're supposed to be > normalized reflections of real-world throughput. OTOH there's the > "technology dividend", where a new machine's MSUs may be "larger" than the > previous machine's--IOW, n MSUs on a newer machine may net you better > performance than the same n MSUs on an older machine. (Or maybe this is > just because the old machine is getting rusty :) ) > > And of course there's the fact that different workloads perform > differently. > > But MIPS are even fuzzier and are thus a worse measure. > > In theory, there are IBM sales reps who should be able to help with this, > too. > > -----Original Message----- > From: IBM Mainframe Discussion List <[email protected]> On Behalf > Of Jay Maynard > Sent: Friday, June 12, 2026 10:51 AM > To: [email protected] > Subject: Re: Selecting z model MSU > > When we did this last year, we simply picked the capacity level that was > the closest match to the z14's and wasn't any smaller. We wound up going > from a z14-L02 to a z16-M02. It's worked out well for us. > > On Fri, Jun 12, 2026 at 8:27 AM Jake Anderson < > [email protected]> wrote: > > > Hello > > > > Are there any specific headroom for MSU to be considered while moving > > from > > z14 to z16 > > > > For example , > > If we have 55MSU, What would be the formula or a best approach to > > select a > > z16 ? > > > > Considering based on MIPS is a good idea or an MSU ? > > > > Any pointers would be appreciated > > > > Regards > > Jake > > > > ---------------------------------------------------------------------- > > For IBM-MAIN subscribe / signoff / archive access instructions, send > > email to [email protected] with the message: INFO IBM-MAIN > > > > > -- > Jay Maynard > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, send email > to [email protected] with the message: INFO IBM-MAIN > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN > -- Jay Maynard ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
