http://blogs.msdn.com/b/volkerw/archive/2009/02/02/live-migration-in-windows-server-2008-r2.aspxOne of the most exciting new virtualization features in Windows Server 2008 R2 (R2) is clearly Live migration. With Live migration you can move running VMs from one Hyper-V physical host to another without any interruption of service. Live migration isen-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)