What is the best/recomended/official way to backup VMs

[James Dinkel]

They should be able to take snapshots, but they wouldn't be any different
than lvm snapshots.

On Fri, Aug 14, 2009 at 9:58 AM, Kent Tenney <ktenney at gmail.com> wrote:

> Can ZFS or btrfs create successful snapshots of VMs?
>
> Thanks,
> Kent
>
> On Thu, Aug 13, 2009 at 3:24 PM, Etienne
> Goyer<etienne.goyer at canonical.com> wrote:
> > Mat wrote:
> >> Just an idea: what if both a KVM snapshot and the LVM snapshot could be
> >> done at the same time? It should then be possible to bring the VM up in
> >> a running state.
> >
> > I guess that might be good in some circumstance, but only when it's ok
> > to get a system in a previous running state.  This is not always the
> > case; for example, you would not want a mail server to go back a couple
> > of hours in time (mail in the queue at backup time would get redelivered
> > at restore time, mail deleted from user inbox would reappear, mail
> > delivered to user's inbox since backup would disappear, etc).
> >
> >> My idea is probably trying to address the underlining issue from the
> >> wrong angle. I suppose that if I needed a service to run 24/7 and
> >> downtime was not acceptable, I would run my services in a server farm
> >> with proper fault-tolerance and redundancy, and where database backup
> >> and recoveries wouldn't be done on the VM level.
> >
> > I do not know.  Backup is a tough problem, and there is no
> > one-size-fit-all solution.  Dumping the file system content and
> > checkpointing system states have been the two most common approaches to
> > date, but they are flawed for many applications.  It's all a matter of
> > compromise.  But yeah. backup is second best after resiliency, so you
> > may want to invest your time and brain cycles in that instead.
> >
> > Just my 0.02$ ...
> >
> > --
> > Etienne Goyer
> > Technical Account Manager - Canonical Ltd
> > Ubuntu Certified Instructor
> >
> >  ~= Ubuntu: Linux for Human Beings =~
> >
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> >
>
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