Hello,
On 12.09.2005 07:27, ty Wilson wrote:
Hi Bacula People,
It will be painfully apparent that I am new to bacula.
Our organisation performs a backup to two SDLTs every week (it takes two
to hold the full set). Every four weeks, they want to relabel the tapes
as 'monthly-XX', do the weekly back-up to it, take that week's tapes off
site. They also want to bring back two old monthly tapes from
way-back-whenever and relabel them with the weekly tape pair name of the
ones that they'd relabelled to make the monthly (whoa, I just lost
/myself/!).
Ah, I see you just understood why it's sometimes more useful to let
bacula do the volume handling :-)
Anyway, all that aside--I've read the manual and I'm just not sure on a
particular issue: can one purge then relabel volumes willy-nilly, even
with volume names you've used before, and backups will still happen
happily?
Yes.
You can do what you describe, although I think it's not necessary.
It requires manual intervention where things could happen automatically,
or some clever scripting.
Both possibilities are, in my opinion, not the best choice in terms of
data security.
Why don't you let bacula do what it's designed for?
Prepare two pools, one for monthly, one for weekly backups, set the
retention times to what you want, and let the backups write to the right
pools.
Bacula will automatically handle volume retention and only overwrite
tapes that are pruned, i.e. where you decided that the data was old
enough to be overwritten.
You wouldn't have to think about volume labels and relabeling, only move
the tapes offsite and bring them back. The book-keeping can be done by
bacula, and after all, that's the main point of using such a software.
E.g.:
we have the following SDLTs on-site:
wk1.a, wk1.b ; wk2.a, wk2.b ; wk3.a, wk3.b ; wk4.a, wk4.b
and say the following off site:
mth1.a, mth1.b
it's weekly backup time so I put the full set over: wk3.a and wk3.b
...
now it's monthly backup time, so I purge wk4.a and wk4.b, relabel them
as mth2.a and mth2.b, put the full set over mth2.a and mth2.b, then take
mth2.a and mth2.b off site.
I bring back mth1.a and mth1.b from off site, purge them, relabel them
to wk4.a and wk4.b then I'll be able to use them in the weekly cycle again.
(Am I right?)
Basically, yes, but you can do things simpler - simpler to setup and
simpler to operate. You might lose some of your tape rotating, using
some tapes more than others, but I think that's a fair price for a
simple setup.
Arno
Pre-emptive thanks,
ty
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IT-Service Lehmann [EMAIL PROTECTED]
Arno Lehmann http://www.its-lehmann.de
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Security * Process Improvement & Measurement * http://www.sqe.com/bsce5sf
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