Re: [Bacula-users] what strategy for backing up files only once?
2010-02-27 06:20:57
Hi,
On Fri, 26 Feb 2010, Ralf Gross wrote:
> I'm still thinking if it would be possible to use bacula for backing
> up xxx TB of data, instead of a more expensive solution with LAN-less
> backups and snapshots.
>
> Problem is the time window and bandwith.
VirtualFull backups be a partial solution to your problem. We have a
laptop which we get very short backup time windows for -- never enough time
to run a full backup. Instead, we run incrementals (takes about 20% of the
time) and then run virtualfull backups to consolidate them. We never need
to run real full backups.
> If there would be something like a incremental forever feature in
> bacula the problem could be solved. I know the Accurate Backup feature
> but without deduplication (don't backup/store the same file more than
> once) it's possible that the space needed for backups will grow (user
> moves or renames a directory with 10 TB of data...) Accurate Backup
> will detect this and back up the data again (instead of just pointing
> to the new location inside the database).
Deduplication of this sort is not available as far as I know.
I suggested a feature some time back which might help. I'm not sure if
there's enough interest in it though. You can see this in the bacula
projects file:
http://bacula.git.sourceforge.net/git/gitweb.cgi?p=bacula/bacula;a=blob_plain;f=bacula/projects;hb=HEAD
Item n: Implement a Migration job type that will create a reverse
incremental (or decremental) backup from two existing full backups.
Gavin
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