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xen-users
[Xen-users] Re: 100% safe way to backup domU: (was Yet another backup)
On Fri, Jan 12, 2007 at 08:59:38AM +0000, Nico Kadel-Garcia wrote:
> Ligesh wrote:
> > Then we won't even lose the applications buffers. We can restore it
> > perfectly to the exact state it was before. I think this feature is
> > important enough for real life scenarios. Uptime is the key. Installing
> > backup software in each domU completely nullifies any advantage of
> > virtual hosting.
> >
> I like it: especially for high-availability setups, a very short
> shutdown of 20 seconds at a scheduled time to get an absolutely
> reliable, absolutely complete backup is extremely valuable.
The time would be around 1 second or less. Just enough to create a snapshot.
Even on a fully loaded node, it will take a maximum of around 2seconds.
> Installing backup software in domU
When you have 2000 domUs with each customer only paying you $10/month, it may
not work out. The idea is to simply scale up. Virtualization becomes useful
only if you can mass manage the domUs, otherwise we only save a bit on
hardware, and the manpower costs are still high.
Thanks.
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