Solved

Number of Virtual sockets vs. Number of cores per socket confusion?

Posted on 2014-02-03
5
4,962 Views
Last Modified: 2014-02-19
Hi People,

Suppose I need a compute power of 8x vCPU for my server, which number should I select?


Virtual Sockets: 8
Cores per socket: 1

Or

Virtual Sockets: 1
Cores per socket: 8

Or

Virtual Sockets: 2
Cores per socket: 4

Or

Virtual Sockets: 4
Cores per socket: 2

Which one is good over the other ?
0
Comment
  • 3
5 Comments
 
LVL 118

Assisted Solution

by:Andrew Hancock (VMware vExpert / EE MVE)
Andrew Hancock (VMware vExpert / EE MVE) earned 375 total points
ID: 39830981
they are ALL the same! (as far as performance is concerned). But sometimes it does depend on NUMA in the server, and using Cores, could result in slower performance.

If you have a licensing Restriction to use Cores, use Cores.

otherwise just use sockets!

see here for the benchmarks and explanation.

https://blogs.vmware.com/vsphere/2013/10/does-corespersocket-affect-performance.html
0
 
LVL 13

Assisted Solution

by:Abhilash
Abhilash earned 125 total points
ID: 39830992
The performance really does not change with different configurations.
Check the below link to understand how they usually work and decide for yourself which is the best configuration
http://frankdenneman.nl/2013/09/18/vcpu-configuration-performance-impact-between-virtual-sockets-and-virtual-cores/#comment-20293
0
 
LVL 118

Assisted Solution

by:Andrew Hancock (VMware vExpert / EE MVE)
Andrew Hancock (VMware vExpert / EE MVE) earned 375 total points
ID: 39831001
I would also query if you really need 8 vCPU for your server.

Which is 8 Cores on the physical processor?

Many VMs require no more than 2 or 4 vCPU.
0
 
LVL 7

Author Comment

by:Senior IT System Engineer
ID: 39831002
Thanks Andrew,

my ESXi host is Xeon E5-2670

CPU sockets: 2
Cores per socket: 8
Logical Processor: 2x8x 2 (HT enabled) = 32

so I guess in this case the maximum vCPU that I can assign without causing NUMA problem for the future Exchange & SQL Server is:

Virtual Sockets: 4
Cores per socket: 8

is that correct ?
0
 
LVL 118

Accepted Solution

by:
Andrew Hancock (VMware vExpert / EE MVE) earned 375 total points
ID: 39831009
Just assign virtual sockets.

e.g. 32 virtual sockets.

unless you have a licensing requirement.
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
esx multi vlans 3 58
How to Migrate my VMware to my ESXI 5.5 6 72
Unable to Remove Orphan Lun 11 43
Sky and freeview box 3 18
HOW TO: Install and Configure VMware vSphere Hypervisor 6.5 (ESXi 6.5), Step by Step Tutorial with screenshots. From Download, Checking Media, to Completed Installation.
In this article, I will show you HOW TO: Install VMware Tools for Windows on a VMware Windows virtual machine on a VMware vSphere Hypervisor 6.5 (ESXi 6.5) Host Server, using the VMware Host Client. The virtual machine has Windows Server 2016 instal…
Teach the user how to use configure the vCenter Server storage filters Open vSphere Web Client:  Navigate to vCenter Server Advanced Settings: Add the four vCenter Server storage filters: Review the advanced settings: Modify the values of the four v…
Teach the user how to join ESXi hosts to Active Directory domains Open vSphere Client: Join ESXi host to AD domain: Verify ESXi computer account in AD: Configure permissions for domain user in ESXi: Test domain user login to ESXi host:

920 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

14 Experts available now in Live!

Get 1:1 Help Now