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Just ending subsystem QBATCH and running your batch job in
subsystem QCTL won't make your backup run faster. Not running a bunch of
jobs in QBATCH while you are running backups could increase the throughput
of your backup though.
The main rule to follow is to run the backup during a time a light system
activity.
If you could take your system to a restrictive state (ENDSBS *ALL) prior to
running your backup, then you would see a noticeable decrease in the amount
of time it takes to run. This is because the backup process wouldn't have to
allocate and lock objects. However, the obvious drawback with this scenario
is that no one could use your system while your backup is running and your
backup would have to run as an interactive job in subsystem QCTL. ==================================
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