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Re: [Qemu-devel] [PATCH] add file: migration support (r2)

From: Jamie Lokier
Subject: Re: [Qemu-devel] [PATCH] add file: migration support (r2)
Date: Tue, 18 Nov 2008 03:04:37 +0000
User-agent: Mutt/1.5.13 (2006-08-11)

Paul Brook wrote:
> > I'm not sure if "live" migration to a file is really useful.  "Dead"
> > migration is useful for suspending a VM to disk.
> Right. That's the point I was trying to make.

I thought of a use for live migration to and from a file.  It's when
you have to restart a host while minimising downtime of all its
guests.  The liveness reduces that downtime.  That could be rebooting,
or simply replacing QEMU/KVM by a newer version.  It would require a
lot of guest memory (collectively), to be worth it.

-- Jamie

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