Hi,
I have the following setup:
- Existing Cluster_A with 3 ESX hosts running on Intel Xeon E5540 CPU (Nahelem)
- 30 VMs is running in a production environment
- 2 new ESX hosts running on Intel Xeon E5649 CPU (Westmere)
The 2 new hosts are not added into vCenter yet but the goal is to allow the adding of these 2 new hosts into Cluster_A.
I understand that in order to have all 5 hosts in the same cluster, EVC mode must be enabled with the highest level being "Nahelem" (lowest common denominator).
From a theoretical point of view, any CPU masking to be applied is going to be identical to the existing CPU settings presented to the running VMs, thus enabling EVC using the same CPU architecture should not cause any conflict or problem.
Therefore, I would like to seek confimation that enabling EVC and setting it to Nahelem level for Cluster_A will not cause an impact (e.g. BSOD) or downtime to the VMs.
Thanks,
Kenny