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Re: [virt-tools-list] Best way to backup my VMs



Thank all of you for the quick responses. I'll start testing virsh save / copy / virsh restore in my test environment. =D

On Tue, Apr 12, 2011 at 2:09 PM, Christian Grassi <christiangrassi gmail com> wrote:
This is what I was thinking, probably for a webserver suspend is fine
but for a database machine ora Mailserver a save is the better choice.

Thanks guys

On Tue, 2011-04-12 at 10:37 -0600, Eric Blake wrote:
> On 04/12/2011 10:19 AM, Christian Grassi wrote:
> > Actually you create a doubt in my mind...
> > If you have a VM with lots of memory, if you just suspend the machine,
> > and back it up without saving the ram, in teory, as no fsync succeded
> > you could lose a lot of stuff which is in the filesystem cache and not
> > synced.
> > Am I wrong ?
>
> "crash-consistent" can indeed lose data, and the amount lost increases
> when there is more memory to cache more in-flight operations; which is
> why 'virsh save'/save/'virsh restore' (full memory and disk state) is
> safer than 'virsh suspend'/save/'virsh resume' (crash-consistent disk
> space, but no memory to go along with it).
>


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