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Enabling EVC on existing Cluster

Posted on 2014-01-20
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Last Modified: 2014-01-20
HI,

I have two hosts with the same CPU Intel® Xeon® Processor X5650 which I believe to be part of the "westmere" generation.  I have both of these hosts in a cluster and want to enable EVC.  My question is, if I enable this on running hosts and specify "westmere" in EVC will it have any affect on the running VMs? Would my current virtual machines be using all the features available under the "westmere" generation without this enabled? I do have plans on bringing in a new host that will be on a higher generation so am looking to get this enabled.

Thanks
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Question by:ts11
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Andrew Hancock (VMware vExpert / EE MVE^2) earned 2000 total points
ID: 39795624
You generally enable EVC for the lowest common functions of the processor, I assume, your new servers will have newer processors and higher functions. This lowest common functions is your EVC Basline.

e.g. EVC L4 (Sandy Bridge) or L5 (Ivy Bridge)

Xeon X5650 are indeed EVC L3 Westmere, so your VMs are already using these functions, in this EVC Baseline.

So enabling should be okay, and will not require a power OFF, BUT if EVC cannot be enabled it will state the reason.

see here also

About Enhanced vMotion Compatibility

VMware KB: Enhanced vMotion Compatibility (EVC) processor support

VMware KB: EVC and CPU Compatibility FAQ
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by:ts11
ID: 39795638
Yes, the new server going in will be capable of EVC L5.  I will set EVC to L3 "westmere" before introducing the new server to the cluster.  Thanks!
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LVL 124
ID: 39795650
Yes, best way, be prepared, it's a pain, if you add to the Cluster, and have VMs running on the new hardware!
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