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Taylor Brown's Blog

Test Lead for Windows Core OS Division on the Hyper-V Team.

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Welcome to the professional blog of Taylor Brown.  I am a test lead on the core virtualization team (Hyper-V) at Microsoft.

This blog will contain information about virtualization, Microsoft, Hyper-V, operating systems, testing, and whatever else I end up talking about...

 

Standard Microsoft Disclaimer:
"This posting is provided "AS IS" with no warranties, and confers no rights. You assume all risk for your use."

-Taylor Brown


24 Core Support For Hyper-V Hosts!

There is a newly released update for Hyper-V that will increase the support limit from 16 logical processors (cores) to 24 logical processors!  Since we support up to eight virtual processors for every one logical processor (8:1 over subscription) this increases the maximum number of virtual machines from 128 virtual machines to 192! Keep in mind that if all of those virtual machines had two virtual processors the maximum number of supported virtual machines would be 96 (96 vm's x 2 vp's = 192).

BTW: If your server has 16 or fewer logical processors (cores) you don't need this update and I would advise not installing it as you should only install updates you need.

Link To The Update: Update for Windows Server 2008 x64 Edition (KB956710)

 

Taylor Brown
Hyper-V Integration Test Lead
http://blogs.msdn.com/taylorb

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Published Tuesday, September 23, 2008 12:52 PM by taylorb

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# 24 Core Support For Hyper-V Hosts! : EasyCoded @ Tuesday, September 23, 2008 4:02 PM

PingBack from http://www.easycoded.com/24-core-support-for-hyper-v-hosts/

24 Core Support For Hyper-V Hosts! : EasyCoded

# re: 24 Core Support For Hyper-V Hosts! @ Wednesday, December 03, 2008 7:25 AM

Hi, I have customer who want to do Server Consolidation on 8x CPU Xeon Quad-core Hardware. Is is possible to use Hyper-V? If not, customer is going to consider VMWare. :-(

======================================================
By 8x CPU Quad Core you mean a total of 32 cores?  Assuming so they would need to use the bcd flag numproc to set a total of 24 cores...  We have announced that in  Server 2008 R2 Hyper-V will support 32 cores but not in R1.

 -Taylor
ps - out of curiousity what 32 core Xeon machine is this?

Joseph

# Issues with adding a host to VMM when the computer has more than 16 processors @ Tuesday, February 10, 2009 1:03 AM

It has come to our attention that trying to add a computer with more than 16 processors (for example a quad six-core machine with 24 processors) is crashing the VMM server with the following exception: System.InvalidOperationException: Nullable object

HyperVoria

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