Steve Costaras schrieb:
  

I've been diving into Bacula the past 2-3 weeks to come up with a backup  
system here for some small server count but very large data store sizes  
(30+TiB per server).

In the coarse of my testing I have noticed something and want to know if  
it's by design (in which case it would be very wasteful of tapes); a  
misconfiguration on my part (possible as I said I've only been playing  
with it for the past 2-3 weeks), or a bug.

Ok, what I'm seeing is that I do a full backup of the client machine,  
that runs well;  I then delete an entire subdirectory say  
/var/ftp/{DIRA} which has say 10,000 files or about 1TiB or data.   I  
then do a restore of that directory from tape (last backup was a full).   
Now I am seeing that the next incremental I do has the full  
/var/ftp/{DIRA} being backed up again as if it were all new files,  
likewise a differential will also back up this directory in full again  
as well.    In my mind at least since this directory was in the full  
backup and I have accurate mode on, the backup system should KNOW that  
the files are already on tape (the full backup that was used to do the  
restore) and should only back up /NEW/ files added to that directory  
since that last backup not the entire directory structure after a 
restore.

Can anyone comment?
    

Did you run a backup when all the files in /var/ftp/{DIRA} were
deleted? Or was the next incremental run after all files were restored
again?


Maybe you are looking for the upcoming Basejob feature?

http://sourceforge.net/apps/wordpress/bacula/2009/09/30/new-basejob-feature/

Ralf

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