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Re: [Xen-users] Backup domU

To: Xen User-List <xen-users@xxxxxxxxxxxxxxxxxxx>
Subject: Re: [Xen-users] Backup domU
From: Rainer Sokoll <rainer@xxxxxxxxxx>
Date: Sat, 9 Jul 2011 13:45:34 +0200
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Am 09.07.2011 um 12:17 schrieb Andrew McGlashan:

> The only issue with rsync with rsnapshot from what I can see, is for very 
> large files that change frequently.  You might end up having loads of copies 
> of these large files and that would be painful in terms of storage and 
> transfer.  Take a 2TB Oracle datafile for instance; don't want to touch that 
> right now with this method, but Oracle has other backup methods anyway .....

Yes, rsnapshot does deduplication by using hard links. This is file based 
deduplication; what we really want is deduplication on block level, like e.g. 
ZFS does.
For Linux, I came across lessfs (http://sourceforge.net/projects/lessfs/files/).
Anyone here who can provide experiences with lessfs?

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