| Kelly Bert Manning 2006-11-29, 9:55 pm |
| Clark F Morris (cfmpublic@ns.sympatico.ca) writes:
>
> Actually, z/OS allocation is even more arcane. If your file is going
> to go over 5 volumes (tape reels, etc.) on tape or virtual tape you
> need to specify a volume count. Disk allocation may require a volume
> count as well as space allocation in either bytes, megabytes,
> cylinders or records of some average size. VSAM has its own
> interesting arcanities. Systems Managed Storage can be used by an
> installation to shield the programmers from much of this but a lot of
> the confusing parts still are there.
http://publibz.boulder.ibm.com/cgi-...RSTHIT#FIRSTHIT
Has an example of multi-volume non-VSAM SMS allocation via IDCAMS which bears
some resemblance to an example I posted on the IMS-L discussion list a few
years back.
https://po.missouri.edu/cgi-bin/wa?...NET.CARLETON.CA
For VSAM you can specify * repeatedly in the volume list until you have as
many candidate volumes as you want to have.
You can also do an alter (/) addvol (* ... *) from PDF 3.4 for SMS VSAM
or non-VSAM. DB2 or IMS won't notice the additional volumes until you stop
and start the dataset on IMS or DB2. CICS VSAM may have a similar issue.
|