The Windows Server Notebook

Jan 7 2011   10:44PM GMT

Hyper-V R2 SP1 boosts guest support for Windows 7

Bcournoyer Brendan Cournoyer Profile: Bcournoyer

Is 5:00 p.m. on a Friday too late for a little Hyper-V-centric news? Nah.

Microsoft’s Michael Kleef just posted a short update on his personal TechNet blog about a new discovery involving Hyper-V R2 SP1. Apparently, the latest version of Hyper-V will now support up to 12 virtual machines per logical processor, up from the previous max of eight, but only for Windows 7 SP1 guests.

In other words, admins can host up to 12 guest operating systems per logical processor on a Hyper-V host as long as each of those guest OSes are running Windows 7 SP1. Otherwise, the ratio of VMs/logical processor remains at 8:1.


The concept of “VMs per logical processor” is a sort of confusing one, however, as most admins are more familiar with VMs per core. One commenter on Microsoft’s requirements and limits page for Hyper-V even pleaded that the company change its lingo, noting that “while [logical processors] might be technically correct, what really matters is virtual processors per physical cores. This is a much easier concept to grasp.”

For his part, Kleef attempted to clear up the confusion in his post. He noted that “[Microsoft doesn’t] really support VMs/core…we actually support VMs/logical [processors]”, explaining that the term core implies “physical core support”, while logical processors “can be either physical or multi-threaded cores.”

Of course, he also added to the confusion by writing “Hyper-V SP1 increases support for VM/core” right in the title of the blog post, but still…

For more information on the first service packs for Windows 7 and Server 2008 R2, visit SearchWindowsServer.com.

 Comment on this Post

 
There was an error processing your information. Please try again later.
Thanks. We'll let you know when a new response is added.
Send me notifications when other members comment.

REGISTER or login:

Forgot Password?
By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy

Forgot Password

No problem! Submit your e-mail address below. We'll send you an e-mail containing your password.

Your password has been sent to: