[one-users] # RVMs not correct during live migrate

[Carlos Martín Sánchez]

Hi Stefan,

On Thu, Sep 18, 2014 at 6:34 AM, Stefan Kooman <stefan at bit.nl> wrote:

> Hi,
>
> I'm currently upgrading to ONE-4.8.0 on a cloud. I'm live migrating a bunch
> of vm's. While doing that I see that the RVM counter for the Hosts is not
> correct. All the scheduled VM's are already counted on the hypervisor
> depicted to run the VM's. After the migration has finished the
> amount of RVMs is correct. Note that this is not a big issue
> whatsoever, more an artefact.
>
> FYI,
>
> Gr. Stefan
>
>
This is done on purpose. During the migration, the VM is accounted in both
Hosts because we don't really know if the migration will succeed or not.
As soon as the migration starts, we want the destination host capacity to
be updated, so the scheduler doesn't overload the host. But on the other
hand, we don't want to remove the VM capacity from the source host, because
if the migration fails the VM will be returned to that host, and we don't
want to tell the scheduler that the resources are free yet.

Regards
--
Carlos Martín, MSc
Project Engineer
OpenNebula - Flexible Enterprise Cloud Made Simple
www.OpenNebula.org <http://www.opennebula.org/> | cmartin at opennebula.org |
@OpenNebula <http://twitter.com/opennebula> <cmartin at opennebula.org>
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