You could always do the checksum and copy before the backup.

Just dump the files to a different directory.  Then copy the files that have
changed to the directory that gets backed up.

-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Michael
Koppelman
Sent: Wednesday, November 29, 2006 8:03 AM
To: Dan Langille
Cc: bacula-users@lists.sourceforge.net
Subject: Re: [Bacula-users] checksums

For us it's a problem because we are dumping out some very large  
databases, some of which change daily but many which do not. We'd  
like to dump the files out every night and just have bacula back up  
the changed files. The unchanged files were recreated but are still  
identical to previous versions. We wouldn't care if they were  
restored with the wrong mtime. In fact, I've never run into a  
situation where I was concerned about the mtime of the restored files.

M.

On Nov 28, 2006, at 8:12 PM, Dan Langille wrote:

> On 28 Nov 2006 at 17:26, Michael Koppelman wrote:
>
>> Sorry if this is redundant but I just wanted to add my voice to the
>> mix that it is too bad that bacula backs up files that have not
>> changed just because their mtime changed.
>
> I have never seen it as a problem.
>
>> In the end, it is probably  less expensive to checksum than move and
>> handle redundant data. It  would at least be nice if one could choose
>> the scheme in the  configuration so people who need to conserve
>> computation time and  people who need to converse bandwidth could
>> choose accordingly.
>
> Any restore would give you the wrong mtime.  Unless you started
> getting fancy within the Bacula Catalogs.
>
> -- 
> Dan Langille : Software Developer looking for work
> my resume: http://www.freebsddiary.org/dan_langille.php
> PGCon - The PostgreSQL Conference - http://www.pgcon.org/
>
>


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