If the reason to do the full backups is to speed up the restore of
certain clients, that will certainly work. We have used
copymode=absolute for that purpose. Of course, you will have to go
through the regular DRM routine of setting up TSM, restoring the TSM
database, defining your tape libraries, etc.
But once you have your running TSM environment in place and start to
restore clients, the fact that the data is on a much smaller number of
tapes will drastically improve the restore speeds.
In our design, we back up TSM client data to disk storage pool first,
and then backup to copy storage pool, then migrate the disk storage pool
to tape. So during our DR tests, we restore the disk storage pool
volumes from tape first before we do any restores. That way, the client
restores will hit disk for most of their data, instead of contending for
a finite number of tape drives. Restoring the disk storage pool takes
4-5 hours to perform, but I think it saves many hours later during the
client restore phase.
I am not sure I understand why you want to do it to a separate tape and
copy storage pool. Is it because you only want to bring a smaller set
of tapes to the test?
Best Regards,
John D. Schneider
Lead Systems Administrator - Storage
Sisters of Mercy Health Systems
3637 South Geyer Road
St. Louis, MO 63127
Phone: 314-364-3150
Cell: 314-486-2359
Email: John.Schneider AT Mercy DOT net
-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
Marco Bezuidenhout
Sent: Tuesday, March 18, 2008 8:03 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: [ADSM-L] Copy mode = Absolute
Hi All
We have been asked to do full backups this coming weekend to a different
storage pool than normal. The data will then also be copied to a
separate copy storage pool. This copied storage pool will be taken to an
offsite location for restores. They are doing this so the first restores
will be fast. Afterwards the normal primary and copy pools will be used.
Would using copy mode absolute be sufficient so that all required data
be available for restores?
Has anyone ever done ABSOLUTE backups for restores? Does anyone know of
any gotcha's we should look out for? Should we rather use archives?
Regards
Marco Bezuidenhout
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