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Re: KVM live block migration: stability, future, docs

 

On Aug 9, 2012, at 1:03 AM, Blair Bethwaite <blair.bethwaite@xxxxxxxxx> wrote:

> Hi Daniel,
> 
> Thanks for following this up!
> 
> On 8 August 2012 19:53, Daniel P. Berrange <berrange@xxxxxxxxxx> wrote:
>> not tune this downtime setting, I don't see how you'd see 4 mins
>> downtime unless it was not truely live migration, or there was
> 
> Yes, quite right. It turns out Nova is not passing/setting libvirt's
> VIR_MIGRATE_LIVE when it is asked to "live-migrate" a guest, so it is
> not proper live-migration. That is the default behaviour unless the
> flag is added to the migrate flags in nova.conf, unfortunately that
> flag isn't currently mentioned in the OpenStack docs either.

Can you file a bug on this to change the default? I don't see any reason why this should be off.

Vish



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