I can speak from experience. GRS Ring performance sucks with even 2 LPARs compared to GRS STAR.
-----Original Message----- From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> On Behalf Of Gibney, Dave Sent: Monday, June 1, 2020 11:41 PM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: Base SYSPLEX setup [CAUTION: This Email is from outside the Organization. Unless you trust the sender, Don’t click links or open attachments as it may be a Phishing email, which can steal your Information and compromise your Computer.] I've never gone here. The impression I got from the folks on this list was that GRS ring performance was abysmal for more than 2 lpars. > -----Original Message----- > From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> On > Behalf Of Brian Westerman > Sent: Monday, June 01, 2020 9:37 PM > To: IBM-MAIN@LISTSERV.UA.EDU > Subject: Re: Base SYSPLEX setup > > It's all about the cost. Especially right now, there is just no money > to put into the box. If we knew for sure that the software CF would > only take 1MSU or less, then we would do it in a heartbeat, but it's a > base model z13s so there are only 13MSU's int he entire complex, > taking even one away is a big deal, but IBM will only guarantee that > it wouldn't take more than "a couple". We don't have a couple to give > up. Even just 2 is more than 15%. The goal is to install GRS (free) so that > we can drop MIM. > > On Mon, 1 Jun 2020 11:15:45 +0200, R.S. > <r.skoru...@bremultibank.com.pl> wrote: > > >W dniu 01.06.2020 o 02:27, Brian Westerman pisze: > >> The box isn't maxed out, but it's pretty close. It's a base z13s > >> and no > money to upgrade it. The cards are a cheap way to get by (they are > under > $400 with $0 increase in maintenance costs), whereas the cost of a CF > is far greater. We can't use the software CF option (build a CF lpar > without a actual CF processor) because that would take us over the > tipping point and no budget to add any more MSU's to resolve it. > Maybe in a year or so, but for now that's not a viable option. > > > >OK, we know it's poor configuration. Old machine, small one. > >So, what is the reason for Sysplex? What goal to achieve? > >Sysplex takes some CPU, so for "pretty close to maxed out" CPC it is > >not very fine. > >IMHO it would be reasonable to consider purchase second hand CPC as > >standalone CF and some cards. Of course the question about the goal > >is still valid. > > > >-- > >Radoslaw Skorupka > >Lodz, Poland > > > > > > > > > > > >========================================================= > ============= > > > >Jeśli nie jesteś adresatem tej wiadomości: > > > >- powiadom nas o tym w mailu zwrotnym (dziękujemy!), > >- usuń trwale tę wiadomość (i wszystkie kopie, które wydrukowałeś lub > zapisałeś na dysku). > >Wiadomość ta może zawierać chronione prawem informacje, które może > wykorzystać tylko adresat.Przypominamy, że każdy, kto rozpowszechnia > (kopiuje, rozprowadza) tę wiadomość lub podejmuje podobne działania, > narusza prawo i może podlegać karze. > > > >mBank S.A. z siedzibą w Warszawie, ul. 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