Re: [Xen-users] snapshots on xen

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Mon, Apr 12, 2010 at 10:10:11AM -0500, Javier Guerra Giraldez wrote:
> On Mon, Apr 12, 2010 at 9:54 AM, Pasi Kärkkäinen <pasik@xxxxxx> wrote:
> > Uh, that's why you take a SNAPSHOT of the disk before doing the backup,
> > and then do the backup from the snapshot!
> 
> then you don't have to stop the VM, do you?  unless you also want to
> save the VM state with the storage, which would be the only way to
> preserve userspace buffers... but restoring a full disk/ram/cpu backup
> even just a few hours after backup would still generate a lot or
> errors when 'suddenly' all clients are gone.
> 
> i really don't see the point of Dom0 backups.  you always need DomU
> cooperation, and that's already solved by network backup systems
> 

This thread started about a need to do disk+memory state backups.
The method I described (in the first email) allows you to do that.

If you also want to take consistent file backups from the disk snapshot/copy,
then you need to do more coordination with the guest.

-- Pasi


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