[ovirt-users] Cluster Processor Change

Forgive me if this is a duplicate, as I had spam filter problems previously when I sent this inquiry. Environment Rundown: OVirt 4.2 6 CentOS 7.4 Compute Nodes Intel Xeon 1 CentOS 7.4 Dedicated Engine Node Intel Xeon 1 Datacenter 1 Storage Domain 1 Cluster 10Gig-E iSCSI Storage 10Gig-E NFS Export Domain 20 VM’s of various OS’s and uses The current cluster is using the Nehalem architecture. I’ve got the deploy two new VMs that the current system will not allow me to configure with the Nehalem based cluster, so I’ve got to bump up the architecture of the cluster to accommodate them. Before i shut down all the current VMs to upgrade the cluster, I have some questions about the effect this is going to have on the environment. 1. Will all of the current VM’s use the legacy processor architecture or will I have to change them ? 2. Can I elevate the cluster processor functionality higher than the underlying hardware architecture ? 3. In regards to the new cluster processor, will all of the processor architectures below the one I choose be an option for the existing and future VMs ? I apologize for the long post and I hope that I haven’t left out any vital information.