Scott Drummonds on Virtualization

x86 Über Alles


RISC is dead.  x86 is taking over the world.

At least that is how I read a press release from IDC dated 28 February, 2012.  Here are a few key points from the IDC statement:

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A Performance Tip for ESX 3.0 and ESX 3.5


Do you have any running instances of ESX 3.5 or older?  Are those instances running on processors that are no more than a couple of years old?  If so, I have a tip for you: update your hosts to ESX 4.0. Seriously, upgrade to vSphere already. It’s been out for a year!

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vSphere 4.0, Hyper-Threading, and Terminal Services


I recently wrote a blog article detailing Hyper-Threading (HT) and its effect on vSphere.  An astute reader pointed out, a recent update to Project VRC‘s terminal services analysis suggests disappointment with HT on vSphere.  We spent a lot of time looking at those results to understand why they contradicted the body of performance data, which show HT offering 10-30% gain on vSphere. What we discovered led us to create a vSphere patch that would allow users to improve performance in some benchmarking environments.

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Hyper-Threading on vSphere


I continue to receive many questions from our customers on the expected performance gains of the new version of Hyper-Threading in Intel’s Core i7 processors. The answer requires a little bit of discussion on Hyper-Threading, a little bit on ESX, and comes with some performance data. If you are still interested, read on.

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Newer Processors and Virtualization Performance


[New content has been added to this is an update to an old article from the performance community.]

Newer processors are much more important to virtualized environments than the non-virtualized counterpart. Generational improvements have not just increased the raw compute power, they have also reduced virtualization overheads. This blog entry will describe three key changes that have particularly impacted virtual performance.

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