----- Original Message -----
From: "Ruegsegger, Jeff" <[email protected]>
Newsgroups: bit.listserv.ibm-main
Sent: Wednesday, June 09, 2010 4:12 PM
Subject: DFSMSdss Physical dumps of 3390 Mod 27
We recently completed a DASD refresh and we opted to migrate off 3390-3's
to
3390-9's and 3390-27's. As such we have had to change our daily and weekly
volume backups from a physical to logical dump with the following
additional sub-
keywords of SHARE and WAIT(1,2).
This however causes some datasets to not get backed up as we do not get
standalone time for our backups. We were forced into the logical dump mode
as
the physical dumps were causing elongated RESERVE's (converted to global
ENQUEUES by CA-MIM) and would spend hours thrashing due to the synchronous
batch that runs.
Obviously this was happening on the smaller devices all along but it
happened in
such a short time (1/9th the # of datasets) that it did not cause a
problem.
Doe's anyone have any similar experiences to share and possible solutions.
Environment:
EMC DMX4 (Escon) and we do not have SNAP, but we do have TF Mirror S/W but
no extra disk for using mirror.
Jeff,
Try adding CONCURRENT to your DFDSS dumps. The control unit will give you a
clean point in time backup.
Regards,
Tom Conley
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