> -----Original Message----- > From: IBM Mainframe Discussion List [mailto:[email protected]] On > Behalf Of Edward Gould > Sent: 10 November, 2017 18:02 > To: [email protected] > Subject: Re: USERCATALOGS moving to SMS > > > On Nov 10, 2017, at 6:14 AM, Joe Owens <[email protected]> > wrote: > > > > I am in the process of testing moving our user catalogs to SMS so that > we can use RLS in ZOs V2.2 > > > > It all works just fine and looks like a very good performance > benefit.. Historically we have a volume for each user catalog. I guess > this goes back to the days of reserves, etc. > > > ——————————SNIP———————————— > Jesse, > > The days of one catalog per volume was in the VS1 days. They also used a > method of sub allocation, in that you defined a huge space on the volume > and all new vsam datasets were put into that one space. > I vaguely remember doing the conversion to MVS and the conversion worked > like magic, what used to be one dataset was now several hundred. I was > happy that the person who originally created it allowed enough vote > space. > > Ed >
I suppose the VS1 catalogs were CVOL catalogs, like under SVS, where I started. Later, after converting to ICF catalogs there were so many things to consider, like deadlocks between BCSs and VVDSs of 2 datasets on 2 volumes, that the effective recommendation/practice was 1 catalog dedicated per volume. After converting the reserves to global enqs, these problems/restrictions were lifted. Kees. ******************************************************** For information, services and offers, please visit our web site: http://www.klm.com. This e-mail and any attachment may contain confidential and privileged material intended for the addressee only. If you are not the addressee, you are notified that no part of the e-mail or any attachment may be disclosed, copied or distributed, and that any other action related to this e-mail or attachment is strictly prohibited, and may be unlawful. If you have received this e-mail by error, please notify the sender immediately by return e-mail, and delete this message. Koninklijke Luchtvaart Maatschappij NV (KLM), its subsidiaries and/or its employees shall not be liable for the incorrect or incomplete transmission of this e-mail or any attachments, nor responsible for any delay in receipt. Koninklijke Luchtvaart Maatschappij N.V. (also known as KLM Royal Dutch Airlines) is registered in Amstelveen, The Netherlands, with registered number 33014286 ******************************************************** ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
