openstack team mailing list archive

[Vishvananda Ishaya <vishvananda@xxxxxxxxx>]

On Aug 9, 2012, at 7:13 AM, "Daniel P. Berrange" <berrange@xxxxxxxxxx> wrote:

> 
> With non-live migration, the migration operation is guaranteed to
> complete. With live migration, you can get into a non-convergence
> scenario where the guest is dirtying data faster than it can be
> migrated. With the way Nova currently works the live migration
> will just run forever with no way to stop it. So if you want to
> enable live migration by default, we'll need todo more than
> simply set the flag. Nova will need to be able to monitor the
> migration, and either cancel it after some time, or tune the
> max allowed downtime to let it complete

Ah good to know. So it sounds like we should keep the default as-is
for now and revisit it later.

Vish