David:
I was assigned the job (many years ago) to speed up the process (we
did it weekly) with some tinkering of JCL parameters I think (If I
recall correctly) we got it down to 20 minutes (to tape). It wasn't
hard.
Ed
On Jan 17, 2013, at 7:37 AM, O'Brien, David W. (NIH/CIT) [C] wrote:
To each his own but wouldn't an Export/Import be more efficient.
There's no additional file to define, no jcl to change or files to
rename.
Besides the sample jcl is provided in sys1.samplib(ARCSTRST).
HSMPRESS is located at the end of the member.
-----Original Message-----
From: Staller, Allan [mailto:[email protected]]
Sent: Thursday, January 17, 2013 8:27 AM
To: [email protected]
Subject: Re: DFHSM CDS size versus multi-cluster
Probably needs to be re-orged. Define a "new cluster" shut down HSM
(all LPARS) and repro. You will probably be amazed at how small the
re-orged dataset will be.
That being said, my DFHSM CDS's are defined as VSAM extended
format dataset in a "do nothing" SMS management class and storage
group.
Concurrent copy will greatly improve the speed of CDS backups.
Works great.
HTH,
<snip>
I'm running z/os V1.12 and I've got my BCDS filled with 85%. It's
size is
6500 CYLS with no SEC space.
VSAM characteristics are:
SHROPTNS(3,3) RECOVERY UNIQUE NOERASE
UNORDERED TEMP-EXP NOREUSE NONSPANNED
INDEXED NOWRITECHK NOIMBED NOREPLICAT
EXTENDED EXT-ADDR
In a short time I'll have to create a new BCDS, so, in your opinion
what's advisable to have (performance aspect, backup
considerations?, etc)??
1) a bigger BCDS or
2) multi cluster
Note:
- DFHSM cdss are shared among 3 lpars
</snip>
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