The OP hasn't said whether or not any DASD is shared. If there is a need to share PDSE, it is only supported within a Sysplex. MIM is not sufficient
-- Tom Marchant On Fri, 21 Jun 2024 13:49:29 +0200, Radoslaw Skorupka <[email protected]> wrote: >To complement: >Parallel Sysplex - a CF is required, which mean sysplex links (emulated, >free - for PS within single CPC). GRS is STAR mode is possible and >strongly suggested. (GRSplex is required, the mode is suggested). > >Base Sysplex - CTC links required. In the old days also sysplex timer. >Now it can be sysplex link to provide time synchronization for STP >(Server Time Protocol). The GRS is mandatory and it's configuration is >RING, which is not the best from performance point of view. For base >sysplex within single CPC there are no STP-only links, but CTC over >FICON is required. Note: the FICON can be shared, that means used for >other purposes. > >Monoplex. GRSplex is still possible (unless something changed) and it is >RING topology with drawbacks mentioned above. Of course multiple >monoplex LPARs may share DASD without GRSplex, but again it is not >seamless - at least PDSE sharing is almost impossible. > >...and there is CA-MIM family of products. :-) > > >-- >Radoslaw Skorupka >Lodz, Poland > > > > >W dniu 21.06.2024 o 08:41, Brian Westerman pisze: >> You can just use extra FICON interfaces as FCTC's. IBM refers to that >> method as a baby sysplex. It allows you to have GRS in ring mode. TO have >> star mode you need CF's. >> >> If you have multiple LPARs and you share dasd, then you need either CF's >> (expensive) or Ficon CTCs (pretty cheap). The setup is very simple. CF's >> are much faster but ficon CTC's easily handle 3,4 or 5 lpars without any >> issues at all. >> >> Brian >> >> ---------------------------------------------------------------------- >> 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 ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
