[Xen-users] Re: 100% safe way to backup domU: (was Yet another backup)

[Ligesh <myself@xxxxxxxxxx>]

On Sat, Jan 13, 2007 at 12:57:04AM +0800, Tim Post wrote:
>  Take backup of only these directories.
>
> /etc
> /var
> /home
> /usr/local
> 

 The same effect can be better achieved by taking an incremental backup 
relative to the OSimage with which the vm was built. So full backup is taken 
not per VM, but rather PER Distro or PER osimage. I am working on a solution 
using the concept of hard links as used by rsnapshot. IN that case, we will 
just take a full backup of the distro, and then use rsync to honour hard links 
and break them if it encounters a new version. That would mean that the name of 
the OSimage should be kept in the config file, but that can be done as a 
comment.


 See, with VM we can always go for hard science. :-) I have always been scared 
of special cases. In the provider scenario with large number of identical 
virtual machines, it could lead to very large space saving, and yet, you get 
100% consistent backup.

 Thanks.



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