So this has my curiosity peaked, how does IBM suggest doing a compress on a Linklist lib that needs compressing, inquiring minds would love to know ?
Sent from my iPad Scott Ford Senior Systems Engineer www.identityforge.com On Jan 20, 2012, at 8:09 AM, Peter Relson <rel...@us.ibm.com> wrote: >> Try running an IEBCopy compress against the data set (option "z" against. > >> TSO-ISPF display of the PDSE). It might be a little complicated as it's >> in the Linklist, and so disp=old wouldn't work (still allocated to LLA), >> so you'll have to use disp=shri in a batch job. > > This is not good advice, in general. Of course it's your system, so > shooting yourself in the foot is always an option you are allowed to take. > > The system allocates LNKLST data sets for a reason -- so that you can't > get the data set DISP=OLD which in turn means that if you're doing things > right you will not be able to do such damaging operations as compress > (where for compress "doing things right" means getting the data set > DISP=OLD, and by "damaging" I mean damaging to other processes that might > have knowledge of where a member is within the data set, not damaging to > the data set itself). > > Bluntly, if you compress a LNKLST data set without DISP=OLD, then don't > complain if something related to that data set no longer works. > > If you must compress the data set, then get it out of the LNKLST and out > of LLA management. And note that there is no fully safe way to do the > former unless you have added the data set to the now-activated LNKLST set > after IPL and are able to terminate/restart all jobs that started after > that LNKLST set was activated. > > Should compress require DISP=OLD? Maybe. But that's unlikely to change, > and definitely won't change as a system default (one could imagine giving > the customer a knob to ask that for their system the default be that). > > Peter Relson > z/OS Core Technology Design > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to lists...@bama.ua.edu with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: INFO IBM-MAIN
