Windows Server 2012 Hyper-V Role introduces a new capability, Hyper-V Replica, as a built-in replication mechanism at a virtual machine (VM) level. Hyper-V Replica can asynchronously replicate a selected VM running at a primary site to a designated replica site across LAN/WAN.
Although many small and midsize businesses run their workloads on virtualized servers, they haven’t been able to take advantage of the fault tolerant capabilities of virtualization such as failover clustering. The licensing and hardware costs and technical complexity involved in building a clustered Hyper-V deployment tend to put failover clustering out of reach for smaller organizations. Fortunately, Hyper-V offers a replica feature that’s well suited for helping smaller organizations improve their disaster readiness.