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

[Jamie Lokier]

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