Hi,
On 5/19/2006 3:55 PM, John Goerzen wrote:
Hello all,
In the Bacula manual, one suggestion for daily tape rotation is to use a
different pool for each day. That sounds excessively complex to me. We
want to do daily rotations to offsite storage, though.
I thought of a couple of options.
One is to just remove each day's tape from the changer, and let Bacula
find a new tape as appropriate. (See my other message on this topic.)
I've then set Volume Use Duration on our daily tapes to 6d, so they
become available for the following week. The nice side-effect of this
is that if we have a holiday, or someone forgets to change a tape one
day, then Bacula will just continue adding data to the previous day's
tape.
Another thought would be to set Volume Use Duration to, say, 22h. This
would also force Bacula to use a new tape each day.
Why does the manual instead suggest a different pool for each day?
It's a question of taste, I assume... and it depends on what you want.
The pools for each day allow to easily determine which tapes can be used
for a given day, while one pool and a clever set up of retention times,
use durations and possibly other settings allows Bacula to more
automatically handle tape usage.
I suspect that one of the reasons is that setting up many pools is,
though its more work, easier to understand than use duration and
retention periods. Another reason might be that, as far as I can tell
from reading this list, there are many people who simply *want* to have
a tape labeled "Monday", one labeled "Tuesday" and so on.
Personally, I agree with you in that one can find a setup with only one
pool. Also, I think Volume management is one thing Bacula can do much
better than I and thus I prefer numbering the tapes and letting Bacula
decide which ones to use.
Arno
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