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Windows Server 2008 R2 Hyper-V™ Live Migration

Live migration is integrated with Windows Server 2008® R2 Hyper-V™  and Microsoft® Hyper-V™ Server 2008 R2.  With Hyper-V™ live migration, you can move running VMs from one Hyper-V™ physical host to another without any disruption of service or perceived downtime.

Hyper-V™ live migration has very similar requirements to Hyper-V™ Quick Migration. For organizations already using quick migration, the shift to using live migration should be simple.  The physical hosts that will participate in live migration must be configured with Microsoft Failover Clustering Services as a Failover Cluster and must use shared storage.  In addition, the physical hosts must use the same processor type.  For example, to use live migration to move a VM from one Hyper-V™ physical host to another, both physical hosts must use processor(s) from the same manufacturer.  It should be noted that there are no differences in storage requirements between Quick Migration and live migration. 

For Articles and White paper from Microsoft  click here

New and Updated Features in Windows Server 2008 R2..click here

Below is a complete list of the requirements for Hyper-V™ live migration:

 Hyper-V™ live migration is supported on the following editions of Windows Server 2008 R2:

  • Windows Server 2008 R2 x64 Enterprise Edition
  • Windows Server 2008 R2 x64 Datacenter Edition
  • Live migration is also supported on Microsoft® Hyper-V™ Server 2008 R2.
  • Microsoft Failover Clustering must be configured on all physical hosts that will use live migration
  • Failover Clustering supports up to 16 nodes per cluster
  • The cluster should be configured with a dedicated network for the live migration traffic
  • Physical host servers must use a processor or processors from the same manufacturer
  • Physical hosts must be configured on the same TCP/IP subnet
  • Physical hosts must have access to shared storage

 Recommendations and Notes:

  • A clustered shared volume is recommended for VM storage in a cluster where live migration will be used.
  • One live migration can be active between any two cluster nodes at any time.  This means that a cluster will support number_of_nodes/2 simultaneous live migrations.  For example, a 16-node cluster will support 8 simultaneous live migrations with no more than one live migration session active from every node of the cluster.
  • A dedicated 1 Gigabit Ethernet connection is recommended for the live migration network between cluster nodes to transfer the large number of memory pages typical for a virtual machine. 

The cluster configurations that have been validated by vendors can be found through the listings in the FCCP program under the heading of The Microsoft Support Policy for Windows Server 2008 Failover Clusters ..click here

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