Hyper-V Overview
Key Features of Hyper-V. Hyper-V in Server 2008 R2 adds new features to the first generation of Hyper-V.
Live Migration
Live migration lets you migrate a running virtual machine from one physical computer (host) to another while the virtual machine is still running. With it you can move running VMs from one Hyper-V physical host to another without any disruption of service or perceived downtime.
Processor Support
You now have support for up to 64 logical processors. With new processor capabilities, you may move a VM to a host with a similar processor family type (for example, ”Intel Core 2-to-Intel Pentium 4” or “AMD Opteron-to-AMD Athlon”), enabling migration across a broader range of server host hardware.
Cluster Shared Volumes
Hyper-V uses Cluster Shared Volumes (CSV) storage to simplify and enhance shared storage usage. Multiple hosts can access the same Logical Unit Number (LUN) on SAN storage. This storage can be Fibre, iSCSI and Serial Attached SCSI.
CSV enables faster live migration and easier storage management for Hyper-V when used in a cluster configuration.