Hyper-V 3.0 is the virtualization feature created for the client version of Windows 8 and Windows Server 8. It is offered as a stand-alone product.
Hyper-V 3.0 builds on older versions of Hyper-V which creates a virtualized environment for multiple partitions to run. The hypervisor layer, or the parent partition, enables the management of child partitions. Hyper-V uses the term "partition" to refer to a virtualization layer that provides an independent, isolated environments in which guest operating systems and applications can run.
Distinguishing itself from previous iterations of the hypervisor, Hyper-V 3.0 has an extensible virtual switch, which affords advanced networking features such as extensions that inspect, monitor and sample traffic. Hyper-V 3.0 also offers live storage migration, which, in a step up from Windows Server 2008 R2's Quick Storage Migration, does not require periods of downtime. It is also capable of migrating virtual machines (VMs) without shared storage.
Hyper-V 3.0 is built to be scalable; it can support more than 32 nodes and 4,000 virtual machines.