Microsoft Hyper-V Server 2008 R2 that includes live migration is now available from Microsoft Download here.

Hyper-V Server 2008 R2 a stand-alone hypervisor that includes live migration and expanded processor and memory support for host systems. You can consolidate workloads onto a single physical server and is ideal for development and test environments.

Hyper-V Server 2008 R2 includes:

• Support for physical computers with up to 8 physical processors.

• Support for 64 logical processors and for running up to 384 virtual machines with up to 512 virtual processors.

• Support for using up to 1TB of physical memory (virtual machines can use up to 64GB each).

• Support for clustering.

• Support for CPU Core Parking, which allows Windows and Hyper-V to consolidate processing onto the fewest number of possible processor cores, and suspends inactive processor cores.

• Support for Second Level Address Translation (SLAT) in CPUs. On Intel processors this is called “EPT” while AMD calls it “NPT”. SLAT adds a second level of paging below the architectural x86/x64 paging tables in x86/x64 processors, providing an indirection layer from virtual machine memory access to the physical memory access. In many virtualization scenarios, hardware based SLAT support can offer performance improvements.

• Support for VMQ, Chimney, Jumbo Frames and other networking enhancements.

• The ability to hot add/remove SCSI virtual hard disks.