On 01/03/2013 09:48 AM, Sven Tegethoff wrote:
> On 03.01.2013 08:19, Gary R, Schmidt wrote:
>>> Does anyone know whether bacula can be made to work on a block-level
>>> dedupe storage system? Are there any plans to support this
>>> technology?
>> What magic are you expecting?
> If I had to guess I'd say he wants to backup de-duplicated data only
> once instead of re-duplicating it. You're correct if you say "of course
> it's going to work" - after all, it's transparent on filesystem level.
> But depending on how redundant the data on the drive actually is, you
> might end up with a backup several times the original disk size - unless
> there is some mechanism to make bacula aware of which parts of the data
> is redundant. Backing up redundant data kinda defeats the purpose of
> deduping.

Cannot it be summarized just by "client-side global de-duplication"? Ie. 
if the file A from Client1 is already backed up, the same file from 
Client2 is backed up as a pointer only. If this is not possible, we 
don't have a "true" and the "best" form of de-duplication :)

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