2 notes: You need not regress to pre-GRS, you need to regress to pre-Hyperswap, which required the elimination of Reserves by converting them to global enqueus with GRS. CA-MIM provided (when we used it) GRS functionality across Sysplexes.
Kees. -----Original Message----- From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> On Behalf Of Allan Staller Sent: 20 April 2020 14:45 To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: Opinions/experience on sharing catalogs outside plex Yes, it can be done. I reiterate, IMO, this is most likely not a good idea. In order to accomplish this safely, you also need to regress GRS to pre-GRS functionality. Everything affecting this catalog must be handled w/Reserve/Release, and not normal processing VSAM Sharoptions for the catalog need to be changed. IIRC when I "undid" this the catalog hand Shareoptions (2,3) (or was it 4,3?). This option tells z/OS that the user is responsible for Catalog seriailization. SYSDSN, SYSIGGV2, SYSVTOC, SYSZVSAM (?) and the SPF* queues need to be excluded from GRS processing. In my case that led to various deadly embraces that usually led to manual intervention. My $0.02 USD on this is: Why point the shotgun at your foot? -----Original Message----- From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> On Behalf Of R.S. Sent: Monday, April 20, 2020 3:45 AM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: Opinions/experience on sharing catalogs outside plex [CAUTION: This Email is from outside the Organization. Do not click links or open attachments unless you trust the sender.] W dniu 09.04.2020 o 02:11, Rob Schramm pisze: > I am considering sharing some usercats outside of a sysplex. What I > can find is that sysiggv2 must be kept as a reserve to do so. > > Looking for others that have had to do this. > > One question I had was, what happens on a ispf 3.4 when the data set > is part of the catalog but exists in another system? Ief238d? My €0.02 1. You can share catalogs between sysplexes. Note: we mean BCS, which is usually called catalog. 2. The less activity on the BCS the better. 3. The above means: 3.1. Avoid keeping non-shared datasets in the BCS. Use another BCS for that. 3.2. It is not bad idea to have multiple "small" shared BCSes. 4. You cannot use any sophisticated catalog sharing features like RLS or ECS. Regarding you last question: I understand it as you have entry in the BCS, but the dataset reside on volume which is not share, that mean it is unavailable for one system. It's nothing exotic. It's like orphan catalog entry, which sometimes may happen even without BCS sharing (usually as result of human error). However that also means the sharing is not done correctly. The best scenario is when all datasets cataloged in shared BCS reside on volumes which are also shared. Preferably the BCS is also on the volume from that group. 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