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On 03/08, Ignazio Cassano wrote:
> Hello All,
> I am looking for a solution to speed up live migration.
> Instances where ram is used heavily like java application servers, live
> migration take a long time (more than 20 minutes for 8GB ram instance) and
> converge mode is already set to True in nova.conf.

Hi,

Probably doesn't affect your case, but I assume you are using ephemeral
nova boot volumes.

Have you tried using only Cinder volumes on the VM?

Cheers,
Gorka.


> I also tried with post_copy but it does not change.
> After the first live migration (very solow) if I try to migrate again it is
> very fast.
> I presume the first migration is slow because memory fragmentation when an
> instance is running on the same compute node for a long time.
> I am looking for a solution considering the on my computing node I can have
> a little ram overcommit. Any case I am increasing the number of compute
> nodes to reduce it.
> Thanks
> Ignazio