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Re: [Veritas-bu] Restore from Data Domain using 3 selections
2008-06-09 20:51:21
That's certainly one way to do it, but Jeff's original problem is related to the difference in how bptm and bpdm perform restore operations (actually it happens when the restore is kicked off while the images are examined in the catalog).
If a restore is initiated for tape, the restore jobs are "mpx" restore jobs and if everything falls into place, all the streams begin restoring at the same time (from one or many tapes). However, when disk is found, the "mpx" restore is turned off and therefore everything is restored sequentially... even if it WAS multiple streams that your underlying disk technology can support (ie, don't have multiple reads/writes from/to the same physical disk).
I'd suggest an enhancement request to your favorite avenue (support, SE, etc).
-Tim
On Mon, Jun 9, 2008 at 3:27 PM, Mark Glazerman < Mark.Glazerman AT spartech DOT com> wrote:
Jeff,
The way that Data Domain restores is down to how you submit the restore
jobs from the backup and restore console in NBU. If you want to restore
root, usr and var you could click on root, uncheck the mountpoints you don't
want to restore and kick off the restore. That will restore everything in
1 job. If you drill down and only select the individual mountpoints you
want and kick each one off as an individual restore, Data Domain will send data
to multiple restore jobs.
As an FYI we found that we were able to restore our biggest
database (Exchange) quicker in a single stream than in multiple streams.
A single stream allowed us to restore approximately 100GB per hour.
Mark Glazerman
Desk: 314-889-8282
Cell: 618-520-3401
P please don't print this e-mail unless you really need to
For the
second time I've noticed that a backup we created that had 3 simultaneous
selections going to Data Domain (as it previously did to tape) on restore is
only doing a single selection. When we did this to tape it would
restore 3 different selections simultaneously just as it had backed them up.
Is there
something I need to tell bprestore to force it to do this when the 3 selections
were all going to the same location like a Data Domain? If not
would starting 3 separate restores of only the files in the specific selections
cause it to run concurrently?
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