[Networker] Multiple clones from VTL
2007-04-24 12:26:20
I just realized a major disadvantage of using our LTO-3 tapes, which
currently fits almost a week's worth of backups on tape - thats an
aweful lot of data to lose if a tape is unreadable...
So, to limit the possibilities of this, I was thinking of simply making
an extra clone of the savesets, and have just a couple questions.
Right now, the migration from VTL to LTO-3 is handled by a script that
is wrapped around nsrstage, which clones the volumes then deletes the
existing savesets from the media DB. Thus the clones are the only copies
and are used for restores, no issue.
I was thinking of changing this to:
- Split the tapes into two clone pools, "A" and "B"
- Use nsrclone to clone the savesets on the VTL to pool A
- Use nsrstage to clone the savesets on the VTL to pool B, thus freeing
the VTL storage
This would have to be sequential, so it would take twice as long. Not a
big deal for us right now. We could also keep one pool nearline, and the
other offsite.
Does this make sense? Is there a better way?
Also, if a restore is requested, which clone is it likely to choose to
restore from? If I'm doing a non-saveset level restore, is there a way
to specify to use an alternate clone? Or if the primary clone fails, is
a saveset restore my only option?
-Brian
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