Steve Arnett wrote:
I was reviewing our company backups that are using ESS Flashcopy when
it occured to me that our backups are still out of sync using this
feature. In order for my backups to be in sync, it is necessary to
set up all of the FC pairs within an ESS and then issue a single
commit to start the Flashcopies. This is possible using the HMC
panels on the Shark, but how can it be done from within MVS? All of
the commands, whether DFDSS driven or TSO driven seem operate on
single pairs and the Flashcopy begins towards the end of the execution
of that single command. While each Flashcopy pair will be in sync
with each other at the point the commit takes place, all of the FC
pairs will be out of sync with each other. For any given multivolume
VSAM dataset, it would render this PIT backup useless.
Is there a way, in MVS, to set up the commands such that a single
commit can be done, which would be equivalent to setting them up on
the ESS HMC?
Steve, as far as I am aware, current IBM software does not support
Flashcopy consistency groups (which is what you are describing).
FDRINSTANT, our FDR enhancement for point-in-time backups using
Flashcopy, Snap, etc, will support Flashcopy consistency groups in the
near future.
Bruce Black
Innovation Data Processing
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