====== Hyper-V Performance ======

See also **[[https://virtualarchitects.com/wiki/doku.php?do=search&id=start&q=hyper-v|more Hyper-V pages]]**

http://social.technet.microsoft.com/Forums/en-US/winserverhyperv/thread/6fb8cc70-bc52-4b3e-9aca-94288225a6ba

http://technet.microsoft.com/en-US/library/dd722835%28v=BTS.10%29.aspx

http://support.microsoft.com/kb/555975/en-us

http://social.technet.microsoft.com/wiki/contents/articles/151.hyper-v-virtual-networking-survival-guide.aspx

http://www.hyper-v.nu/archives/marcve/2013/01/lbfo-hyper-v-switch-qos-and-actual-performance-part-1/

  * In machine BIOS, disable C1E and C-States
  * In machine BIOS, set all Power Management settings to "Maximum Performance"
  * On NICs and switches, enable jumbo frames for connections to the storage, but leave regular MTU on connections to clustering network and LAN, DMZ, ecc (more on this below)
  * On switches, disable all iSCSI optimizations
  * On switches, disable Spanning Tree Protocol for all connections to storage
  * Disable TCP Offloading and Receive Side scaling at the operating system level

<file>
C:\>netsh int tcp set global rss=disabled
C:\>netsh int tcp set global chimney=disabled
</file>

  * Verify which NICs among the ones you have available give the best performance to the storage
  * Disable NetBIOS and Microsoft protocols on connections to the storage
  * Use as many NICs as possible to connect to the storage
  * Install and configure iSCSI and MPIO using Dell MD Storage Software
  * Verify that MPIO is set at Round Robin with Subset
    * MPIO tab on the disk properties in Server Management, Disk Management
  * Designate a preferred Network for Cluster Shared Volumes Communication:

   PS C:\> ( Get-ClusterNetwork "Storage Network 130" ).Metric = 500
   PS C:\> ( Get-ClusterNetwork "Storage Network 131" ).Metric = 501
   PS C:\> ( Get-ClusterNetwork "Storage Network 132" ).Metric = 502
   PS C:\> ( Get-ClusterNetwork "Storage Network 133" ).Metric = 503

  * Resulting settings:

   PS C:\> Get-ClusterNetwork | ft Name, Metric, AutoMetric, Role
   Name                              Metric            AutoMetric                  Role
   ----                              ------            ----------                  ----
   Clustering Network                  1000                  True                     1
   Management Network                 10000                  True                     3
   Storage Network 130                  500                 False                     0
   Storage Network 131                  501                 False                     0
   Storage Network 132                  502                 False                     0
   Storage Network 133                  503                 False                     0

  * Install http://support.microsoft.com/kb/2517329/en-us
  * Set the TCPAckFrequency to 1 on interfaces to the iSCSI storage as explained in http://support.microsoft.com/kb/2020559/ and http://sustainablesharepoint.wordpress.com/2010/03/10/best-practice-for-hyper-v-with-iscsi/

====== Testing ======

http://www.hosting.com/support/info/using-iperf-to-test-network-bandwidth