[libvirt] [Qemu-devel] [PATCH v4] XBZRLE delta for live migration of large memory apps

[Daniel P. Berrange]

On Thu, Aug 11, 2011 at 11:17:09AM +0300, Avi Kivity wrote:
> On 08/10/2011 10:27 PM, Anthony Liguori wrote:
> >>This may be acceptable, wait until the entire migration cluster is
> >>xzbrle capable before enabling it. If not, add a monitor command.
> >
> >
> >1) xzbrle needs to be disabled by default.  That way management
> >tools don't unknowingly enable it by not passing -no-xzbrle.
> 
> We could hook it to -M, though it's a bit gross.

That would needlessly prevent its use for any existing installed
guests with a older machine type, which are running in a new QEMU
Some kind of monitor capabilities seems good to me.

Daniel
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