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  • Blog Post: Issues on Windows Server 2012 and 2012 R2 with VMQ and Emulex network adapters

    There have been several reports of networking and stability issues on Windows Server 2012 and Windows Server 2012 R2 when deployed on hosts equipped with Emulex NICs. These issues arise when VMQ is enabled. The typical symptoms include the loss of network connectivity on one or more virtual machines...
  • Blog Post: Name Resolution Performance of Windows DNS Server 2012 R2

    This article details the name resolution performance of the windows DNS Server 2012 R2, when deployed in a strictly authoritative mode on which recursion has been disabled and root hints have been removed. Machine Configuration The tests were performed on a physical machine deployed as an authoritative...
  • Blog Post: Debugging performance issues with VMQ

    In my last posts about VMQ (virtual machine queues), VMQ Deep Dive, 1 of 3 , I tried to give readers a thorough understanding on the technology and why it was needed. Unfortunately, I still feel like there’s a piece missing around troubleshooting suspected VMQ issues. Therefore, in this blog post I’d...
  • Blog Post: VMQ Deep Dive, 2 of 3

    Introduction In my last blog post of this series, ‘ VMQ Deep Dive, 1 of 3 ,’ I went into detail on why we implemented VMQ and how to view the VMQ settings on the adapter to verify that it was configured properly. In this blog post I am going to explain Static v Dynamic VMQ and then outline...
  • Blog Post: VMQ Deep Dive, 1 of 3

    Virtual Machine Queues (VMQ) is an incredibly powerful performance technology introduced in Windows Server 2012. A concern we’ve noticed as Windows Server 2012 is increasingly deployed in datacenter environments is misconceptions about VMQ, and even “tribal knowledge” that disabling...