Arguably there is no such thing as a "read only data set". It must've got written to (at least) once (or be empty). Maybe CURRENTLY it's not being written to. But when it was the damage could've occurred.
And if this is woolly thinking it's OK: I'm on vacation, kinda sorta. :-) Cheers, Martin Martin Packer, zChampion, Principal Systems Investigator, Worldwide Cloud & Systems Performance, 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: Elardus Engelbrecht <elardus.engelbre...@sita.co.za> To: IBM-MAIN@LISTSERV.UA.EDU Date: 01/04/2016 15:24 Subject: Re: [EXTERNAL] Re: Advice needed - GRS across 2 sysplexes with shared dasd Sent by: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> Dyck, Lionel B. (TRA) wrote: >An unintentional repeat. It is all right. It seemed you got caught in this bad situation. >The original PDSE issue was a PDSE was being read (no updates) on both sysplexes and it became corrupted. I was asked about PDSE protection for a new project and that prompted this thread. Corrupted after reads? What programs were used to read them? What is your RACF reports telling about any successful accesses from both SysPlexes? If you got only Read access reports, then it is time for a PMR. > And yes the PDSE's along with all datasets are shared between both sysplexes as all dasd is shared. Not ideal but it is what it is so I was looking for a solution. Ok, let us see to help you. Must they be shared? Can you not keep two copies which are NOT shared? Say one PDSE in one SysPlex and keeping another in another SysPlex while using something to maintain identical copies? Another question - are ALL the LPARS on the same z/OS level? I'm asking because you can do versioning of the members from z/OS v2.1? Perhaps you could ensure there are timeslots for each SysPlex to allow reads/updates? Say Morning is allowable for Plex 1 and Plex 2 in midday? Or something like that. I have for example a REXX program which is looking for the 'right' time and then do actions based on time of day. You could write it to do things on certain times in certain LPARS. Someone said CA-MIM could be used, but I'm not sure. I know above are straws, but anything including RACF should be examinated to prevent PDSE damages in the future. Groete / Greetings Elardus Engelbrecht ---------------------------------------------------------------------- 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
