We don't have a switch. And GRS can't possibly be worse than MIM using DASD to send the information between the LPARs, which is what is happening now.
Brian On Tue, 2 Jun 2020 11:43:30 +0200, R.S. <r.skoru...@bremultibank.com.pl> wrote: >Good question. However better question is why LPARs withing single CPC >cannot communicate via some emulated channel like ICP or IQD. The only >reasonable answer is because IBM decided. Was the decision reasonable? >That's another question. >Fortunately for FICON CTC it is enough to use *one* channel connected do >a switch. And the channel may be shared, that means may also serve >another CUs. >Assuming poor configuration and lack of budget, that could be a solution >to use two (redundancy) existing FC chpids, attached to switch. Of >course I would choose less busy channels. > >BTW: GRS ring is not for free. It will take CPU cycles. And it will >introduce delays. >The alternative for GRS ring is ...maybe no GRS between LPARs. Maybe >workload can be consolidated on single LPAR or resources may be not >shared. Or sharing may be reorganized. > >-- >Radoslaw Skorupka >Lodz, Poland > > > > > > >W dniu 02.06.2020 o 05:42, kekronbekron pisze: >> Just curious .. why does it have to be FICON CTC, why can't it be SMC-D/R or >> HiperSockets or one of those ICA-SR (or whatever it's called) connectors IF >> 2 machines are involved. >> >> >> - KB >> >> ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐ >> On Monday, June 1, 2020 6:29 PM, Allan Staller <allan.stal...@hcl.com> wrote: >> >>> See the manuals "Setting up a SYSPLEX" and "Merging Systems Into A >>> SYSPLEX". Both can be found on the IBM zOS Library site. >>> Some key items not available in a base sysplex: >>> >>> GRS START (use CTC for inter-image communication. >>> VTAM Generic resources, VTAM MNPS >>> RACF data sharing (RACF sysplex communications is available) >>> Many others. All are described in Setting Up a SYSPLEX >>> >>> HTH, >>> -----Original Message----- >>> From: IBM Mainframe Discussion List IBM-MAIN@LISTSERV.UA.EDU On Behalf Of >>> Brian Westerman >>> >>> Sent: Sunday, May 31, 2020 2:05 AM >>> To: IBM-MAIN@LISTSERV.UA.EDU >>> Subject: 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.] >>> >>> Hi, >>> >>> I'm looking for information on how to set up a base SYSPLEX with only Ficon >>> CTC's that seem to be referred to as XCF CTC's. >>> >>> I'm sure someone had done this before and is probably doing it now for >>> Multiple LPARs that are running on the same processor CEC. Configuration >>> help (parms etc.) would be greatly appreciated. I think all we need to do >>> to connect the 3 existing LPARs is purchase 2 FICON cards (we currently >>> have no extras). Unfortunately, the IBM docs seem to talk a lot about the >>> full parallel sysplexes (with Coupling facilities), but we don't have them, >>> and they seem to be a great deal more expensive than FICON cards which are >>> all we need to implement GRS anyway (that's our goal). We can also >>> apparently create a virtual CF, but the overhead appears to be far greater >>> than we can spare. >>> >>> Any CXF CTC setup information would be greatly appreciated. >>> >>> Thanks >>> >>> Brian >>> > > >====================================================================== > >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. Senatorska 18, 00-950 >Warszawa,www.mBank.pl, e-mail: kont...@mbank.pl. Sąd Rejonowy dla m. st. >Warszawy XII Wydział Gospodarczy Krajowego Rejestru Sądowego, KRS 0000025237, >NIP: 526-021-50-88. 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