> But the use of pools on what for?     
> Just for completeness I must save this data:
> 
> 1) Oracle db (size unknown)
> 2) 5-6 MySQL db (about 25 Gb)
> 3) Some samba share, with office files (5Gb)
> 4) An subversion reposity (size unknown)
> 5) Mail server (size unknown)
> 6) The configuration of 8 servers
> 7) Other things that now I do not remember :)
> 
> I should make a pool for each points?

No, you should make the pools reflect your retention times. If you wish
to keep (which you most-likely will) your Full backups for longer time
than your incrementals. Recycling of volumes is based on the
"lastwritten" time of the volume.

I suggest:

Full-Poll => All full backups.
Incremental-Pool => All incremental backups.
Differential-Poll => All Differential backups.

You would then prefer to keep full backups for the "longest" period,
Differentials for a "shorter" and "incrementals" for even shorter.

I our setup we keep Full for 1y, Differential for 1y and Incremental for
6m. This enables us to:

* restore any file with a days "granularity" for 6 months.
* restore any file wiht a weeks "granularity" for 1 year.
* - then we actually have an Archive Pool that week is backed up to ever
6 months that we keep forever.

If you then dont want to have a "open tape" for longer than a period,
then you set "Max Use Duration" to that. Then after that period of time
you can move it to a different location.

If your "retention times" change across above systems, then you most
likely need more pools. But I would definately suggest just buying one
more pack of tapes instead.


Jesper
-- 
Jesper

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