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Numa and virtual sockets question

I have a quick question around numa and adding more than one sockets.

I have a host that has 2 CPUs.  I also run SQL Server 2008 r2 and it supports 4 cores per processor so I have the guest with two sockets currently.  If I want to enable numa for this host, would it matter how many sockets I assign to the guest that runs the SQL server, am I stuck with one socket?
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ts11
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ts11
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2 Solutions
 
Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Is NUMA  not enabled on your host already?

Do you not have currently 4 vCPU allocated x 1 Core ?

see here

http://blogs.vmware.com/vsphere/2013/10/does-corespersocket-affect-performance.html
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ts11Author Commented:
The configuration I was using is 2 X virtual sockets with 4 X vcpu to each socket.  However my host has 2 cpus, 6 cores per cpu, 24 logical.

So if I was using sticking to numa, I would assign something like 6 virtual sockets and 1 vcpu each?
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
That would be correct, always assign vCPUs (not cores!)
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ts11Author Commented:
Can you just clarify that? when you say always assign vCPUs and not cores.  I have H/T on my cpus, so say I want my machine to have two cores (sockets) for licensing reasons, how can I be sure that I'm staying in the numa boundary by amount of vcpus I assign or have I already stepped outside of it?

Is there an example you could give that would be correct with numa and my host, where I have 8 vCPU and at least 2 vSockets?

Thanks!
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
If you have licensing issues and need to assign cores, then assign cores.

did you read the article I posted ?

see also here

http://www.datacenterdan.com/blog/vsphere-55-bpperformance02-numa-alignment
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bluedanCommented:
Please check this KB and see if it helps.

http://www.experts-exchange.com/Software/VMWare/Q_27876393.html
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