add nodes

I have a cluster with 6 nodes running on version 7.4, all nodes are Dell PowerEdge R630 and now I needed to add the seventh node which is Dell PowerEdge R640. Live migration from a VM residing on a R630 host to R640 goes fine, but when migrating from the new R640 host to R630 the VM...

Hello Experts, I am looking for some advice. Our VMs need had outgrown our current 4 node cluster setup. We just got 4 new servers different specs than original. I would like a recommendation on either to add these 4 nodes to same cluster or create a separate cluster. Pros Vs Cons ...