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Bink on
on September 22 2008, 10:31 PM
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With the recent release of Hyper-V, customers are starting to ask us how to configure Hyper-V to get the best performance. It’s generally recognized that there is overheard running a virtualized environment, but the question that really needs to be answered is how much?
With this in mind, I thought I’d share some of our recent testing of Hyper-V and how disk workloads perform when using Fixed or Dynamic VHDs. The goal here is to provide some data that backs up the tuning guidance that can be here: http://www.microsoft.com/whdc/system/sysperf/Perf_tun_srv.mspx.
The following graph shows the relative performances for a number of different scenarios (with Dynamic VHD being the baseline).
Fixed VHD always performs better than a Dynamic VHD in most scenarios by roughly 10% to 15% with the exception of 4k writes, where Fixed VHD performs significantly better.
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