Moving on to a new blog…

To all my readers I want to thank you!  Over the last couple of years I’ve gotten lots of great feedback and comments on this blog.   It has been read over 386,000 times as of 2/13/2011.   I hope you’ll join me on my new blog where I hope to put out more real…

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Windows Server 2008 R2 Virtual Hard Disk (VHD) Performance Paper

If you have been looking for VHD performance data the paper below should give you a lot of what you have been looking to find.  The paper compares VHD performance on Windows Server 2008 and Windows Server 2008 R2.  It uses the new Native VHD implementation for R2 and loopback VHD 2008.  There are some…

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Hyper-V iSCSI performance numbers

I’ve seen a number of threads and questions recently around iSCSI performance in virtual machines.  If you are looking for Hyper-V information I suggest you check out the following paper: iSCSI 10 Gigabit Ethernet Performance Tuning With Windows Server® 2008, Hyper-v and the NetApp FAS® 3070 http://download.microsoft.com/download/F/B/3/FB38CA2C-6694-4D25-8452-4A28668A87F2/MSFT-NetApp-10G.docx This paper has a really good overview of…

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Useful IO profiles for simulating various workloads

A buddy of mine [Liang Yang] recently shared the following table with me and I thought you might also find it useful with trying to simulate various workloads.  In particular when testing and evaluating Hyper-V. A tool like IOMeter [from www.iometer.org] can be programmed with the mixes of reads/wrtes and sequential/random IO’s detailed below. Workload Category…

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