Re: [Bacula-users] minimum volume retention period
2009-04-02 20:57:33
On Thu, Apr 02, 2009 at 09:25:55PM +0200, Julien Cigar wrote:
> > 1 may 0:00 am : Full backup -> volume "Full-0001"
> > 1 may 8:00 pm : Incremental backup -> volume "Incr-0001"
> > 2 may 8:00 pm : Incremental backup -> volume "Incr-0002"
> > 3 may 8:00 pm : Incremental backup -> volume "Incr-0003"
> > ...
> > 31 may 8:00 pm : Incremental backup -> volume "Incr-0031"
> >
> > 1 june 0:00 am : Full backup -> volume "Full-0002"
> > 1 june 8:00 pm : Incremental backup -> volume "Incr-0032"
> > 2 june 8:00 pm : Incremental backup -> volume "Incr-0033"
> > 3 june 8:00 pm : Incremental backup -> volume "Incr-0034"
> > ...
> > (around 15 june Incr-0001 should be recycled)
> >
> > 1 july 0:00 am : Full backup -> volume "Full-0001" (recycled)
An incremental can be promoted to a full in the middle of a cycle.
This can happen because of a fileset change or a rerun of a failed
level. If such an event happens on June 15, the volume Full-0001 will
be overwritten. At this point, you can't do a restore of the FS from
May 31, even though it's only been 15 days.
- Morty
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