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Date: Wed, 21 Nov 2007 00:02:16 +0100
From: Fabrice Bellard <fabrice@bellard.org>
Subject: Re: [Qemu-devel] Online image backup
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To: qemu-devel@nongnu.org

Matteo Bertini wrote:
> Hello everyone,
> 
> is there any support for an online image backup? Or some direction to
> have it?
> 
> Imagine I have an emulated server. How can I make an online backup of
> the server state?
> 
> If I'm right in the actual design this is very hard.
> 
> Or there are some image internals update rules that permit a consistent
> copy possible?

It should not be difficult provided the VM is using the QEMU qcow2 image
format (doing a backup can be seen as a kind of snapshot).

Fabrice.