Hi Brian, When building a sysplex using CTC's, each LPAR mist have connectivity to all of the other LPARS. If you have more than two LPARS, it gets complicated very fast.
I've always had to get help from IBM for defining the CTC's in HCD. Once you have to connectivity defined, the rest is fairly easy. It's all in the 'Setting up a sysplex' Manual. You have to setup COUPLExx members in parmlib. Here you define the devices that are used for communication. Once that is done and all of the systems are in the sysplex, GRS knows it (I think) and can be defined and used. IF you have two LPARS, then two ficon cards are enough for two sets of communication paths. If you have three LPARS, then you will need 3 Ficon cards If you have four LPARS, then you will need 6 ficons cards This assumes that you have two paths between LPARs to avoid a single point of failure. The IOCP definitions also get complicated the more LPARs you have. Maybe getting an ICP (A dedicated CPU for the coupling facility) and more memory, will not be as expensive as you thing, and will be a lot simpler. Gadi -----Original Message----- From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> On Behalf Of Brian Westerman Sent: Sunday, May 31, 2020 10:05 AM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Base SYSPLEX setup 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 ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN Email secured by Check Point ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
