> -----Original Message----- > From: IBM Mainframe Discussion List [mailto:[email protected]] On > Behalf Of Edward Gould > Sent: 13 November, 2017 10:14 > To: [email protected] > Subject: Re: USERCATALOGS moving to SMS > > > On Nov 13, 2017, at 1:19 AM, Vernooij, Kees (ITOPT1) - KLM > <[email protected] <mailto:[email protected]>> wrote: > > > > 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. > The VSAM catalogs had to vbvsam (sorry its late). > We did have some CVOLS as well. > the *ONLY* issue we had with CVOLS were that the people under sized them > and we ran out of space. Luckily I had access to a program that was > written 20+ years ago by Bell Labs(?), to enlarge the CVOL it took less > than 15 minutes. It was FAST. > I avoided a production outage with that utility. I was sorry to see > CVOLS go. About 15 years before that I had to bone up in the middle of > the night on how CVOLS worked. The people who designed CVOLS were sick > in the head. Yes they were efficient but damn confusing. > > Ed > >
I wrote a program to check the utilization of a CVOL and warn before it became full. It took a while to discover the internal structure, but it was not complicated. 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
