On 2013-10-04 09:33, Radosław Korzeniewski wrote:
> Hello,
> 
> 2013/10/4 Dan Langille <dan AT langille DOT org>
> 
> On 2013-09-27 14:17, Radosław Korzeniewski wrote:
> Hello,
> 
> 2013/9/26 BOURGAULT Antoine <antoine.bourgault AT sib DOT fr>
> 
> Thanks for your answer ... but can you explain what is " aligned
> volumes" ?
> 
> http://www.google.com/search?q=bacula+aligned+volumes [1] [1]
> 
> I don't know, but I think this refers to ZFS, not Bacula.
> 
> Bacula aligned volumes works well with ZFS or other deduplication
> solutions like DataDomain, etc.

Some issues regarding ZFS dedup to keep in mind:

* Dedup will go slowly unless you have enough RAM to hold every hash for 
every block you are deduping
* Compression, instead of dedup, can result in higher throughput 
(compression and decompression is faster than writing/reading the larger 
amount of data to/from HDD)
* The OpenZFS (http://open-zfs.org/) project holds good potential for 
ZFS on Linux

-- 
Dan Langille - http://langille.org/

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