It's better than that: If there is no zIIP (or zAAP) the work runs just fine on a GCP. And RMF reports this as zIIP-eligible (or zAAP-eligible) and it comes out of the GCP headline numbers.
I think there's at least one vendor that does check for a specialty engine and explicitly takes advantage of it if present - but they'll have to speak for themselves. I seem to recall their logic was that setting up for a zIIP isn't free so it's worth not trying if it's going to end up on a GCP. (And thanks to Tim for reinforcing my point.) Cheers, Martin Martin Packer, zChampion, Principal Systems Investigator, Worldwide Banking Center of Excellence, IBM +44-7802-245-584 email: martin_pac...@uk.ibm.com Twitter / Facebook IDs: MartinPacker Blog: https://www.ibm.com/developerworks/mydeveloperworks/blogs/MartinPacker From: Bob Shannon <bshan...@rocketsoftware.com> To: IBM-MAIN@listserv.ua.edu Date: 30/10/2013 11:40 Subject: Re: zIIP simulation Sent by: IBM Mainframe Discussion List <IBM-MAIN@listserv.ua.edu> >That's one aspect - another that has been itching me as I also keep an eye on these potential savings is: >"is there any software out there that is smart enough to recognise the presence (absence) of zIIP and alter the entity created for dispatch to match the environment". So, no zIIP, so we see a TCB/SRB - thus no >projected saving. *IF* we had a zIIP, maybe the "smarts" creates an interruptible SRB and we get actual savings. Yeah, I know, about as likely as I suspect that every product that exploits zIIPs already does this. Vendors cannot count on zIIPs being installed at customer locations. If no zIIPs are available, the work must run in TCB mode. Vendor products can't just terminate if zIIPs aren't available. Bob Shannon Rocket Software ---------------------------------------------------------------------- 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
