On Wed, 23 Oct 2019 19:18:49 +0000, David Purdy wrote: >Dave, I was unclear. The process is a dasd volume reorg to maximize >contiguous free extents. That process, which some products call a sweeper or >compaction, moved a dataset that was opened by PSF but not enqueued. Quite >right that an approach is to exclude them from the dasd reorg. In no way is >the PDSE being compressed, but combining multiple extents into one for sure. > The mystery to me is why PSF OPENs a data set without ENQ. This strikes me as a major integrity threat. And how does it to that?
An IBM employee wrote here long ago about processing DASD blocks with no OPEN and no DEB. But he said even that relied on SYSDSN ENQ (IIRC) for integrity. -- gil ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
