[Veritas-bu] Volume Pools [recommendations please]
2006-04-26 10:00:47
0n Wed, Apr 26, 2006 at 10:57:48PM +0930, Wilkinson, Alex wrote:
> 0n Wed, Apr 26, 2006 at 12:49:25AM -0400, bob944 wrote:
>
> >Alex, you'll get a dozen recommendations. This is the right one. :-)
> >
> >> What is "best practice" with regards to Volume Pools ?
> >>
> >> We are thinking of using a single Volume Pool for all of our
> >> data tapes.
> >> Is it good practice to use the "Netbackup" Volume pool for
> >> this situation ?
> >
> >Yes to the first, no to the second.
> >
> >Offline catalog backup tapes in NetBackup. Everything else in
> >"dsto-mlb".
> >
> >- "dsto-mlb" is a made-up name to suggest that you name your primary
> >pool after your datacenter (and supposing DSTO and Melbourne and that
> >you have, or may later have, other datacenters). The intent is to
have
> >a simple way to keep your DC's tapes separate from "dsto-prth"'s tapes
> >during the inevitable consolidation or other circumstance that
> >co-mingles your and foreign tapes.
> >
> >- Practically, you'll still have a None pool (cleaning tapes, tapes
> >with errors you don't want used until you test or toss them). And
> >probably a scratch pool, a duplicates pool or two, a duplicate catalog
> >backup pool, the goofy DataStore pool unused.
> >
> >- I always suggest a "test" pool. Keeps your production pool from
> >accumulating junk test data, frees you to do any testing and expiring
> >you need to without risk of filling/tying-up/expiring production
tapes.
> >Test what you want, expire the tapes when done and let them go back to
> >scratch.
> >
> >- There _are_ reasons to have separate pools. Find a logical
division
> >_with_ a reason that justifies the administrative and operational
> >burden.
> >
> >- - Customer privacy. Do you have two clients whose data should not
be
> >mixed? Army and Navy pools, then. Related to this is restricting
> >access to a pool to a specified host (media server) if there's a
Really
> >Good Reason to do this.
> >- - Minimizing collateral damage. Does someone occasionally leak
> >classified info onto an unclassified system--requiring you to destroy
> >all unclassified backups which might contain it? Subdivide in any way
> >that makes sense to minimize loss of the rest of the backups.
> >- - Related to the above, is there a project or client whose backups
may
> >need to go elsewhere tomorrow? Just eject all the tapes in that pool
> >and send them on their way with 100% of their info without losing any
> >that's not theirs.
> >- - And a third variation on the going-offsite theme: Maybe a
> >given-to-legal pool for duplicating backups that go off to some other
> >entity and may not return...
> >- - Availability assurance. Have a really small library and need to
be
> >positive there'll be enough tape for the big weekend database backup?
> >Separate, stocked-up "oracle" pool so that other backups/users can't
use
> >up those tapes. Or a separate "user" pool if you allow user
> >backups/archives and that's the group that might use up your free
space
> >(though this method loses a lot with the advent of automatic draw
from a
> >scratch pool).
> >
> >There are undoubtedly other good reasons, but if you insist that
someone
> >come up with a rationale that can't be met any other way--not just
> >something that _sounds_ logical. It makes me crazy to see Full and
> >Incremental pools, or Unix and Windows ones. Remember that pools are
> >another multiplier of tapes-in-use, alongside multiple media servers,
> >mux/non-mux and differen retention levels.
> >
> >You're on the right track. Simplify. Let the computer manage what it
> >can and save your brain for important things.
>
>Awesome detailed reply Bob. Thank ! Much appreciated. However, I have a few
>quick questions still:
>
>1. You say tapes with errors will be moved to the "none" pool. I was under
the
> impression they would be 'frozen' and left in their orginating Volume
Pool ?
> Can you please clarify what you mean by this.
>
>2. What is the "DataStore" Pool actually designed to be used for ?
>
>3. You mention that cleaning tapes would go into the "None" pool. I was
origally
> thinking of creating a "CLN" pool. Bad idea ?
>
>Cheers and thanks to everyone who is responding. Please keep your opinions
and
>ideas flowing in. I am _very_ interested !
>
> -aW
Oh and another question:
Why would I need a 'duplicates' and 'catalogue duplicates' pool ?
-aW
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