Re: [Qemu-devel] Live migration - exec: support to be reintroduced?

["Daniel P. Berrange" <berrange@redhat.com>]

On Tue, Nov 04, 2008 at 11:38:31PM -0600, Anthony Liguori wrote:
> Charles Duffy wrote:
> >Howdy.
> >
> >KVM's live migration support used to support an exec: protoco, 
> >allowing  either a completely arbitrary transport or a mechanism for 
> >storing system state to a separate file for later resurrection, being 
> >used in the latter by libvirt's qemu driver. I notice that this 
> >support no longer exists in the current codebase.
> >Would a patch reimplementing this support be welcome?
> 
> Absolutely.  I wasn't aware that libvirt used the exec: protocol.  I'm 
> somewhat surprised by that.  What did it use it for?

We used it to implement save-to-file, exec'ing 'dd'. I'd rather prefer
that we had a more explicit 'migrate to a file' capability rather than
the hack of execing dd.

Daniel
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