All topics fundamental

This blog is dedicated to all software fundamental topics; numbers, investigations, feature development, test methology, running software fundamentals teams.

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  • Blog Post: 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 numbers, cover more performance topics, and give...
  • Blog Post: Wow... Hyper-V does it again - RemoteFX and Dynamic Memory

    Hard to believe it has been eight months since my last post. I've been deep into Windows Sercurity and Reliabiltiy and was fortunate enough to have a chance to contribute to one of the two features I'm briefly blogging about today - RemoteFX. So what are RemoteFX and Dynamic Memory? RemoteFX is...
  • Blog Post: 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 Virtual...
  • Blog Post: 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...
  • Blog Post: Hyper-V Performance FAQ R2

    Anthony F. Voellm (aka Tony) 12/17/2009 http://blogs.msdn.com/tvoellm This FAQ is titled R2 since it updates the original FAQ as of the Windows Server 2008 R2 Hyper-V.  Since Hyper-V originally released we have continued to improve it.  We have new features in R2 like Live Migration, support...
  • Blog Post: WS08 Hyper-V as RTMed!!!!

    Wow its been a great ride helping get Hyper-V to perform the way it does. So much so I've not posted in a while. You will see some upcoming posts on performance counters, WMI perf interfaces, and real data (yes now with RTM I can post data). In the meantime check out my co-workers post on where to...
  • Blog Post: Negative ping times in Windows VM's - whats up?

    Just a quick blog post that might help you resolve an issue that some customers have seen running under Hyper-V VM's. The issue is negative ping times on multi-processor guests. If you see negative ping times in multiprocessor W2k3 guest OSes you might consider setting the /usepmtimer in the boot...
  • Blog Post: Hyper-V Performance Counters – Part one of many - The overview

    [[ ***IF YOU HAVE SPECIFIC QUESTIONS ON PERFORMANCE COUNTERS YOU WANT ANSWERED PLEASE POST A REPLY WITH THE QUESTION***]] In the next few posts I’ll be covering Hyper-V performance counters. There have been a lot of changes from Beta -> RC -> post RC. In Beta the counters sets for Hyper-V...
  • Blog Post: Hyper-V: Clocks lie... which performance counters can you trust?

    Many people have asked me how to do performance analysis using Hyper-V. The first thing I always tell them is clocks lie. Lets dig into this a little bit. First some basic concepts. There are two types of partitions that the Hypervisor manages. The root partition which is special (manages physical...
  • Blog Post: Good overview of virtualization

    Every now and then I come across articles on virtualization. This one caught my attention because of the amount of technical details. Detail is what I strive for in this blog and I have some good detailed posts on the way. http://it.anandtech.com/IT/showdoc.aspx?i=3263 The coming Windows Hyper...
  • Blog Post: Hyper-V: SCSI vs IDE - Do you really need an IDE and SCSI drive for best performance?

    Wow... blogging is fun and can really help people understand a topic. Other times it can be a chore when the whole picture is not presented up front. This is just what I did in a previous post http://blogs.msdn.com/tvoellm/archive/2007/12/12/which-is-better-ide-or-scsi-windows-server-virtualization-08...
  • Blog Post: Hyper-V: Integration Components and Enlightenments

    In order to get the most from your VM’s it is good to understand a couple of concepts that can impact the performance and operation of your Virtual Machines. Here are some the concepts I’ll describe below; · Integration Components · Synthetic vs. Emulated Devices · Operating System Enlightenments...
  • Blog Post: Hyper-V: How to get the most from your virtualized disk performance

    There are two types of disk controllers that Hyper-V supports: SCSI and IDE. There are two IDE controllers and four SCSI controllers available. Each IDE controller can have two devices. You can not boot from a SCSI controller. This means an IDE disk will be required. The boot disk will be IDE controller...
  • Blog Post: Windows Hyper-V Beta what's that ??? (Updated 12/13/2007)

    Windows Hyper-V was previously called "Windows Server Virtualization" and shipped in the Windows Beta as a prerelease. Now Hyper-V Beta (different name same cool product) is shipping with the latest Windows RC bits. Get it here http://www.microsoft.com/downloads/details.aspx?FamilyId=8F22F69E-D1AF-49F0...
  • Blog Post: Which Windows Server Virtualization 08 (code named Viridian) storage is best for you?

    If you have had a chance to play around with our prerelease bits you might be wondering what all the types of storage are. You might also be wondering how to decide which storage is right for your virtual machine (VM). One question I'll address in a future blog posting is storage performance. Its a little...
  • Blog Post: What you need to know about Windows Server Virtualization O8 (code named Viridian) Snapshot Performance

    First let my say how happy I am to have real bits in your hands. The next generation virtualization product from Microsoft has just shipped with the Windows Server 2008 RC0 (not the final product but getting close). Check out this blog for some external to Microsoft perspective http://www.eweek.com/article2...
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