2011/1/20 Paul Mather <paul AT gromit.dlib.vt DOT edu>:
> On Jan 20, 2011, at 11:01 AM, John Drescher wrote:
>
>>>> This is normal. If you want fast compression do not use software
>>>> compression and use a tape drive with HW compression like LTO drives.
>>>>
>>>> John
>>> Not really an option for file/disk devices though.
>>>
>>> I've been tempted to experiment with BTRFS using LZO or standard zlib
>>> compression for storing the volumes and see how the performance compares
>>> to having bacula-fd do the compression before sending - I have a
>>> suspicion the former might be better..
>>>
>>
>> Doing the compression at the filesystem level is an idea I have wanted
>> to try for several years. Hopefully one of the filesystems that
>> support this becomes stable soon.
>
> I've been using ZFS with a compression-enabled fileset for a while now under 
> FreeBSD.  It is transparent and reliable.  Looking just now, I'm not getting 
> great compression ratios for my backup data: 1.09x.  I am using the 
> speed-oriented compression algorithm on this fileset, though, because the 
> hardware is relatively puny.  (It is a Bacula test bed.)  Probably I'd get 
> better compression if I enabled one of the GZIP levels.
>
> Cheers,
>
> Paul.
>
>
>
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I wil try somethings with scheduling for the few next days.
I will come back next week with the results.
Cheers,
Hugo

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