On Tue, 19 Jun 2012 09:01:36 -0500
Anthony Liguori <[email protected]> wrote:
> I'm not at all convinced that postcopy is a good idea. There needs a clear
> expression of what the value proposition is that's backed by benchmarks.
> Those
> benchmarks need to include latency measurements of downtime which so far,
> I've
> not seen.
>
> I don't want to take any postcopy patches until this discussion happens.
FWIW:
I rather see postcopy as a way of migrating guests forcibly and I know
a service in which such a way is needed: emergency migration. There is
also a product which does live migration when some hardware problems are
detected (as a semi-FT solution) -- in such cases, we cannot wait until
the guest becomes calm.
Although I am not certain whether QEMU can be used for such products,
it may be worth thinking about.
Thanks,
Takuya
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