Re: [Bacula-users] Migration tape to disk and AllowCompression sd usage

[Martin S. <ma...@li...>]

>>>>> On Thu, 16 Dec 2010 13:41:21 +0100, Bruno Friedmann said:
> 
> Hi All,
> 
> On a customer site, we need to "migrate" all the old sdlt tapes to disk base media.
> 
> Everything is working actually between a temporary bacula-sd on which the sdlt tape is connected,
> and the disk based media.
> 
> All work well with the usage of bcopy
> 
> My question is about to get the new disk based media compressed, as actually we are ending with non compressed media
> 
> I was thinking about the AllowCompression = yesno
> But this apply only in director storage definition, and is not used by bcopy (which mainly rely only on device)
> 
> Any "guru" ideas, how to get a final compressed stream ?

It is impossible, because compression is done in the bacula-fd.  The copying
code (bcopy and Bacula's own copy/migration jobs) runs entirely without the
bacula-fd.

You could look at using a compressing filesystem to hold the backups (e.g. zfs
or something based on fuse
http://sourceforge.net/apps/mediawiki/fuse/index.php?title=CompressedFileSystems).

__Martin