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

[Bruno F. <br...@io...>]

On 12/16/2010 08:10 PM, Martin Simmons wrote:
>>>>>> 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

Thanks Martin for your confirmation.

We will compress them with 7z and lzma2 ( so we get a high compression level, and multithreaded jobs )


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Bruno Friedmann (irc:tigerfoot)
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