[ClusterLabs] Live migration possible with KSM ?

[Andrei Borzenkov]

On 30.03.2021 18:16, Lentes, Bernd wrote:
> Hi,
> 
> currently i'm reading "Mastering KVM Virtualization", published by Packt Publishing, a book i can really recommend.
> There are some proposals for tuning guests. One is KSM (kernel samepage merging), which sounds quite interesting.
> Especially in a system with lots of virtual machines with the same OS this could lead to significant merory saving.
> I'd like to test, but i don't know if KSM maybe prevents live migration in a pacemaker cluster.

I do not think pacemaker cares or is aware about KSM. It just tells
resource agent to perform migration; what happens is entirely up to
resource agent.

If you can migrate without pacemaker you can also migrate with pacemaker.