purposes of EVC mode

[vadm168]

Hi,

I know EVC mode has been discussed many times but do I have it correct that:

Purposes of EVC mode:

* Force hosts with newer processors joining the cluster to run without newer processor's additional instruction sets hence making vmotion from new host to older hosts compatible?

* Prevent hosts with older processors from joining the cluster

If a VM running on older CPU instruction set is moving to a host with newer or same level of processors, regardless it's standalone-to-cluster, cluster-to-cluster (with or without EVC on either cluster), it won't have CPU compatibility issue?

Thanks,

[sjesse]

evc filters out newer cpu instruction sets, so they aren't used in virtual machines. This lets vms running on newer hosts migrate to older hosts, since the vms aren't expecting the newer cpu instructions