> 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.
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