Solved

CPU Allocation Hyper V

Posted on 2013-11-03
11
399 Views
Last Modified: 2016-11-23
Dear Experts,

I have Dell Server with 4 Physical Processor,12 Logical Processor each and 6 cores.

I have dedicated this server for Hyper-V

I need to understand how many maximum processor I can assign to a virtual machine.

I would highly appreciate any help.

Thanks
0
Comment
Question by:cciedreamer
11 Comments
 

Expert Comment

by:ikonland
ID: 39619632
0
 
LVL 37

Expert Comment

by:Bing CISM / CISSP
ID: 39619617
for Windows 2012, it is 64.

FYI - Hyper-V Scalability in Windows Server 2012
http://technet.microsoft.com/en-us/library/jj680093.aspx
0
 
LVL 24

Assisted Solution

by:Mohammed Khawaja
Mohammed Khawaja earned 100 total points
ID: 39619635
4 for Win2K and 64 for Win2K12.
0
 
LVL 3

Author Comment

by:cciedreamer
ID: 39619620
BTW, I am using Windows 2008.
0
 
LVL 3

Author Comment

by:cciedreamer
ID: 39619640
What is the concept of processor allocation to guest operating system ?

What are these virtual processor and are they allocated from the physical one ?

Since I have 4 Physical Processor,12 Logical Processor each and 6 cores, why I can't assign more ?

Please help me to understand the cpu allocation.
Thanks
0
Do You Know the 4 Main Threat Actor Types?

Do you know the main threat actor types? Most attackers fall into one of four categories, each with their own favored tactics, techniques, and procedures.

 
LVL 117

Accepted Solution

by:
Andrew Hancock (VMware vExpert / EE MVE) earned 400 total points
ID: 39619787
the relationship, is kind of

1 virtual CPU = 1 Core on the physical processor.

but it may not be the same core on the physical processor.
0
 
LVL 3

Author Comment

by:cciedreamer
ID: 39619903
Thanks for the reply.

I didn't get by this

"but it may not be the same core on the physical processor."

Please can you give me some explanation.
0
 
LVL 117

Assisted Solution

by:Andrew Hancock (VMware vExpert / EE MVE)
Andrew Hancock (VMware vExpert / EE MVE) earned 400 total points
ID: 39619992
no problems, in sumple terms, my simplified understanding is the hypervisor algorythym shifts the process from core to another core on the physical processor, depending upon load on the physical CPU.

so you power on the VM, and the VM's 1 vCPU could be using core#0, but five minutes later it could be shifted to core#5.

the above is simplified, this is really happening in mirco seconds. Hence you workload is scheduled using the cpu scheculer across multipe cores on the host cpu. It's also scheduled to take advantage of under-used cores on the physical processor.
0
 
LVL 3

Author Comment

by:cciedreamer
ID: 39620379
I have found this great article. The author has given excellent explanation..
What I have understood 1 core = 1 Virtual Processor.

Microsoft gives the limitation upto 4 virtual processor that use 4 cores from 1 physcal CPU.

Also I have that limitation can be increased more than 4.

Here is the link I found but it is not officially supported by Microsoft
http://surminski.eu/2012/04/17/hyper-v-how-to-add-more-than-4-cores-to-a-virtual-machine/

Please correct I am understanding anything wrong.

Thanks for your help.
0
 
LVL 117
ID: 39620424
That is correct.
0
 
LVL 3

Author Closing Comment

by:cciedreamer
ID: 39622493
Thanks for the clarifications
0

Featured Post

How to run any project with ease

Manage projects of all sizes how you want. Great for personal to-do lists, project milestones, team priorities and launch plans.
- Combine task lists, docs, spreadsheets, and chat in one
- View and edit from mobile/offline
- Cut down on emails

Join & Write a Comment

Suggested Solutions

#Citrix #Citrix Netscaler #HTTP Compression #Load Balance
#Citrix #XenApp #Citrix Scout #Citrix Insight Services #Microsoft VMMAP #Microsoft ADEXPLORE #Microsoft RAMMAP #Microsoft TCPVIEW #Microsoft AUTORUNS #Microsoft PROCESS EXPLORER #Microsoft PROCESS MONITOR
This video shows you how to use a vSphere client to connect to your ESX host as the root user. Demonstrates the basic connection of bypassing certification set up. Demonstrates how to access the traditional view to begin managing your virtual mac…
How to install and configure Citrix XenApp 6.5 - Part 1. In this video tutorial we have explained step by step installation of Citrix XenApp 6.5 Server on Windows Server 2008 R2 is explained in this video. We have explained the difference between…

705 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