On Thu, 4 Feb 2016 09:33:31 -0600, Peter Ten Eyck wrote: >In z/OS 1.13 we have "usable" dataset (currently used by a CICS region) that >has its >VVDS entry pointing to a different user catalog than the one related to by its >master >catalog alias. > >This is not correct. Under what circumstances is this a problem?
Many years ago, I had a colleague run REPOR MERGECAT as a way of creating a backup copy of some catalogs. I didn't notice the caution in the manual that says that the old catalog should not be used to access the VSAM data sets after the MERGECAT operation. The result was that the VVDS entries for all of the VSAM data sets in the catalogs had been updated to point to the new catalog. The aliases were not changed, so the system continued to use the old catalogs. There were a lot of data sets in the same condition that you describe. I don't remember what the problem was that this caused. Perhaps it had to do with restoring a data set from a backup. Art called me the following week to tell me about the problem and ask for suggestions as to what he should do to fix it. Maybe Art remembers what problems were caused by it. We both learned a lot from the experience. -- Tom Marchant ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
