[nova] Live migration of a RAM intensive instance failed

smooney at redhat.com smooney at redhat.com
Fri Sep 15 11:56:32 UTC 2023


On Thu, 2023-09-14 at 19:07 +0200, Rafa wrote:
> > Hi, could you share logs from the target compute node as well?
> 
> yes, here: https://paste.openstack.org/show/blpJE8krA1N6PVaLTVF0/
> 

if the vm is under heavy memory load then its advisable ot use post-copy live migration.

in general live migration is not intened to be used with a vm under load
as there is no gurenettee that it will ever complete. post-copy live migration
can signifcantly increae the probablity that a vm under load will live migrate
in a reasonabel amount of time.

https://docs.openstack.org/nova/latest/configuration/config.html#libvirt.live_migration_permit_post_copy

auto converge can also help but tis less important

https://docs.openstack.org/nova/latest/configuration/config.html#libvirt.live_migration_permit_auto_converge




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