Bingo! You saved my day, I'd never have thought of this :-)

I have a very large (80G) sparse file in the /opt directory, I'm going 
to take advantage of the "sparse = yes" feature.

Thanks again,
Alberto


---
Alberto Caporro
Director of Security Services - Consulthink Srl
Via dell'Archivio di Stato, 15
00144 Rome, Italy
http://www.consulthink.it
M. +39 335 1217 394
F. +39 06 4549 2454

GPG key fingerprint
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On 4 Apr 2013, at 10:20, Radosław Korzeniewski wrote:

> Hello,
>
> 2013/4/4 Alberto Caporro <a.caporro AT consulthink DOT it>
>
>> Hi everybody,
>>
>> I've just completed a Bacula deployment within our infrastructure and 
>> run
>> through the first backups; while all of them have completed without 
>> any
>> error, one of the jobs gave results that I find puzzling.
>>
>> I backed up our mail server, which is hosted in a virtual machine 
>> with two
>> virtual disks sized at 20G and 200G respectively. I'm only backing up
>> relevant files (/etc, /root and /opt) and measured on the server 
>> itself,
>> the total size amounts to slightly more than 56G.
>>
>> The backup job ends with a total size of 145G, which is clearly 
>> wrong; the
>> total number of backed up files is however correct, standing at 
>> 400k+.
>>
>> Check what files were backuped with "list files jobid=xx" bconsole 
>> command
> and compare it with list of expected files. It is very plausible that 
> you
> have more files on backup then expected. In this case you have to tune 
> your
> FileSet definition.
>
> Another case could be a sparse files. If you have a very large sparse 
> file
> (or files) i.e. 10GB file which allocated only a few MB on disk then 
> Bacula
> will backup 10GB instead of a few MB. To avoid this you should add 
> "sparse
> = yes" option to the FileSet definition. Then Bacula will try to 
> detect a
> sparse space (all zeros) and do not backup this data but an 
> information
> about sparse block only (a few bytes). Bacula sparse detection handle 
> 64kB
> blocks only (a whole 64kB block has to be all zeros to mark it as a 
> sparse
> block).
>
> best regards
> --
> Radosław Korzeniewski
> radoslaw AT korzeniewski DOT net

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