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Dec
31
Hyper-V: Number of NUMA Nodes on a Dual Intel Xeon E5-2630 R2208GZ4GC
Posted by Philip Elder on 31 December 2013 07:39 PM

Original Here: MPECS Inc. Blog: Hyper-V: Number of NUMA Nodes on a Dual Intel Xeon E5-2630 R2208GZ4GC

Here is a snip of the number of NUMA Nodes in a newly stood up Windows Server 2012 R2 Standard server with a pair of Intel Xeon E5-2630 CPUs in the Intel Server Systems Grizzly Pass 2U setup:

image

Here is the same setup showing the number of Cores/Threads:

image

Note that we do not have Hyper-Threading turned off on this particular server.

It’s important to note that a VM that is set up with more vCPUs than cores on one CPU may actually perform poorer than the same VM set up with the vCPU setting equal to or one less than the number of cores available on one CPU.

This is what is meant by spanning NUMA nodes.

Suffice it to say we can spend a while discussing the performance impact of too many vCPUs assigned to one VM. Ultimately, one needs to stress test a VM setup using a variety of configurations to find what will be optimal for that particular VM.

Happy New Year’s Eve everyone. All the best for 2014! :)

Philip Elder
Microsoft MVP
MPECS Inc.
Co-Author: SBS 2008 Blueprint Book

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