Am 16.06.2008 um 15:06 schrieb Michael Short:

>> As i understand it, X amount of copies equal X full backups, so it  
>> should be
>> easy to setup proper volume pools and schedules.
>
> Normally this would be appropriate, but in my case I must use full
> backups as scarcely as possible due to bandwidth restraints. Normally
> all clients get full backups every three months, and incremental
> backups are performed in-between. The problem I'm having is that after
> so many incrementals I have tons copies of the same file (with
> changes).
>
> What I hope to do is eliminate all copies older than a specified date
> as long as there are still X  number of copies left in the catalog.
>
> Eventually I hope to use synthetic backups to prune these files from
> the backup volumes (I use a disk based solution to backup windows
> servers).
>
> Sincerely,
> -- 
> Michael Short
> Securenets
> (901) 233-9926

Well - what about doing differential backups every 2 or 3 weeks and  
incremental more often? Every differential backup will contain any  
changed file since the last full backup and if the incremental backups  
can be based on the last full+differential backup (i'm quite sure that  
is the case) , you should be able to purge all incremental volumes  
between last full and latest diff. In fact bacula should do so, if the  
retention period for incremental volumes is short enough and the pool  
conatins only a few volumes.

Cheers,
Ariano Bertacca
Systemmanagement


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