New MS post: Hyper-V VM Density, VP:LP Ratio, Cores and Threads... (Full Version)

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Scott Lowe -> New MS post: Hyper-V VM Density, VP:LP Ratio, Cores and Threads... (29.Apr.2011 9:45:55 PM)

The Microsoft Hyper-V team this week posted a new article detailing some really great information about Hyper-V density, virtual processor to physical processor ratio and a bunch more information that is invaluable to Hyper-V administrators interested in ensuring that their hosts run in the most efficient - and maximum - way possible.

In the article, the MS team indicates that Hyper-V works with hyperthreading.

If you're a Hyper-V administrator, it's a really good read. What are your thoughts? Does Microsoft get it right in the core count vs. thread count issue?

Scott




synav -> RE: New MS post: Hyper-V VM Density, VP:LP Ratio, Cores and Threads... (19.Jul.2011 8:45:37 AM)

I have been using 8 core machines with Hyper-V hosting a maximum of 15 machines (30 Virtual Processors) per machine. I notice that the processor utilization is less than 20%, maybe the load is not much. But according to the document, I can load VMs utilizing 128 Virtual Processors on these machines and I am utilizing only 30. I do feel the document makes sense, however I remain skeptical in loading more than 50% of what Microsoft says is supported.




Scott Lowe -> RE: New MS post: Hyper-V VM Density, VP:LP Ratio, Cores and Threads... (27.Jul.2011 4:05:14 PM)

I agree that using published maximums as a baseline s probably best avoided. First, it leaves you no room for growth and it's unlikely that a less than optimized system could use it all anyway. You may be happy to know that the upcoming Hyper-V 3.0 increases some of these maximums, so it might help you feel more comfortable moving beyond the 50% point.

Scott




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