Hi Sebastian,

> The files are rsynced from distant sites to a central backup, and 
> bacula is installed as a client on this central backup (so we can get 
> the full/inc/diff backups on LAN). The combined daily upload (from 
> rsync stats) is way below 50Gb.

I think the problem is Bacula is only designed to either backup a whole 
file or not.  It cannot backup just the bits of a file that have changed 
between backups.  rsync is useful for copying a file efficiently over 
the network to a central location as you have done but if just one byte 
of the copied file is different Bacula  will backup the entire file 
(based on its modified date).

Is it possible that, of these 400,000 files being saved, many are 
actually small changes to existing files?

I asked a similar question a few weeks ago; as have several others.  I 
believe the facility to do partial file backup is on a 'wish list' 
somewhere.

Regards,
- David Legg


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