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Hi Ed and thank you for this.
I agree that too many pools are overkill, and its not just
SAP (that was only an example), but I am in the process of reducing everything
down where possible.
As far as I can see, there is no reason, and I am pleased
you agree that mixed retentions is not good (as it is off by
default).
So "Yuk" is the correct terminology :-)
Simon
On Tue, Oct 14, 2008 at 1:57 AM, WEAVER, Simon (external) <simon.weaver AT astrium.eads DOT net>
wrote:
To
give you an example, lets say I have 5 SAP Servers. Each one has a
total of
3 Volume Pools (Offline Backups, Redo Log Backups and Online
Backups). 5 x
3 = 15 Volume Pools.
Yuck. No wonder you want to fix that.
My
aim was to reduce this down to say 3 pools (SAP OFFLINE, SAP ONLINE
and SAP
REDO). Any SAP systems presently known to NetBackup or future
backups for
SAP can use these pools. Thus, trying to help reduce the
amount of tapes in
use.
You should attempt to reduce those three and combine them with all of
the other backups. Do you really, really need to have physically separate
tapes for your SAP backups versus your file system backups? In most
environments, the answer is no. You don't even need a separate pool for
online vs offline tapes - NetBackup knows if the tape is in the robot or
not.
We used to have separate pools by platform but don't even do that
any more. The fewer pools you have, the more likely you are to fill
tapes.
Whatever you do, don't try to mix retentions on the same tape to
reduce tape utilization. That could end up using a lot more tape in the
long run rather than less (if 90% of the tape is incrementals and there's a
7-year backup on the same tape, then you can't reuse the space of those
incrementals for 7 years).
.../Ed
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