Daniel writes:
> Craig Barratt wrote:
> > Daniel writes:
> >
> >> Now, in config.pl I trimmed down to keep only 1 full and 6 incrementals
> >> and 10 (instead of 12) and 20 incrementals for the main storage. The
> >> next day (today) I still see that there are 2 (or more) Full backups for
> >> many, many hosts. Statistics:
> >
> > You will often have an additional full backup since every incremental
> > forces the dependent full to be kept. Look at the list of backups
> > for a specific host.
>
> Here is the list for one random host:
>
> Backup# Type Filled Start Date Duration/mins Age/days Server Backup Path
> 17 full yes 10/24 20:49 53.1 35.6 /var/lib/backuppc/pc/blackbird/17
> 20 incr no 10/30 20:54 9.1 29.6 /var/lib/backuppc/pc/blackbird/20
> 21 full yes 11/1 21:06 44.6 27.6 /var/lib/backuppc/pc/blackbird/21
> 22 incr no 11/2 21:20 8.7 26.6 /var/lib/backuppc/pc/blackbird/22
> 23 incr no 11/5 21:05 10.7 23.6 /var/lib/backuppc/pc/blackbird/23
> 24 incr no 11/7 21:13 9.0 21.6 /var/lib/backuppc/pc/blackbird/24
> 25 full yes 11/13 21:14 77.5 15.6 /var/lib/backuppc/pc/blackbird/25
> 26 incr no 11/14 21:29 7.7 14.6 /var/lib/backuppc/pc/blackbird/26
> 27 incr no 11/15 21:52 9.3 13.6 /var/lib/backuppc/pc/blackbird/27
>
> So, as you can see, there are three full and incrementals between them.
> That to my understanding is not right...
This is correct. Your configuration asks for at least one full
and at least 6 incrementals. It looks like this machine isn't
regularly on the network. The oldest incremental is quite old
(10/30) and the 10/24 full has to be kept for this incremental.
That full won't be deleted until another incremental occurs
(allowing the 10/30 incremental to be deleted).
In fact, the next time this machine is backed up, another full will
be done, not an incremental, since the oldest full is more than 7
days old. At this point, if you want fewer fulls you should either
reduce the number of old incrementals (see: $Conf{IncrKeepCntMin}
and $Conf{IncrAgeMax}), or reduce the total number of incrementals
(see $Conf{IncrKeepCnt}).
The basic point is that the number of incrementals (and their timing)
affects the number of fulls that needs to be kept. However, the
additional storage for each full is more modest than you might
expect beacuse of pooling.
Craig
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