I currently have an oVirt 3.5 cluster with Sandy Bridge Xeon CPU's, and I need to add a new host for more RAM and vCPU's, however the new Xeon e5 cpu's are Haswell based.

Can I mix CPU types (Haswell and Sandy Bridge) in my cluster and will I be able to migrate between my hosts?

I'm guessing that for this to work I'll need to leave my "CPU type" set to Sandy Bridge, will the Haswell based CPU be compatible with my cluster, but just run without any Haswell type features?

Apologies if this is a dumb question or if it's been answered before.

Thank you.

Regards.

Neil Wilson