Re: when can make offsite copy?
2000-11-21 14:59:24
Subject: |
Re: when can make offsite copy? |
From: |
Richard Sims <rbs AT BU DOT EDU> |
Date: |
Tue, 21 Nov 2000 14:49:06 -0500 |
> I am reading through the doc on using a copypool for offsite DR tape
>handling. I keep reading on how it is desirable to wait to all backups to
>disk are complete, then make a copy to copypool, db backups, etc. My
>problem/question is pressed by two issues. If I would wait for the 150-200
>GB to all get to the disk, I will not have enough time to make the tape copy
>befor the tape pickup people will be onsite. On the weekends I will not
>have enough disk to hold all the backups (600 GB) of backups. So can I
>start making backup copies to the COPYPOOL while I am still filling the
>disk?
Matt - There isn't a conceptual problem with "starting early" in that
the Backup Stgpool operation is incremental, and so doing it again
later will get what hasn't already been copied to the Copypool.
A consideration in general would be that related data might be spread
more widely in the Copypool and thus cause any recovery of specific
filespaces using that data to take a bit longer. But that's not much
of a real issue in that recovery would use multiple days' worth of
Copypool imagery anyway, which is quite spread out as it is.
In that you're talking about backing up a disk storage pool, you should
be able to do that in parallel with incoming data, without much contention.
The overriding issue is that your DB backup be done at such a time as
to make your system fully recoverable.
Richard Sims, BU
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