Live migration (LM) is a feature that saw a huge improvement back in the VMM 2012 SP1 version due to the following Windows Server 2012/R2 capabilities:
Live migration between two isolated Hyper-V servers (with no shared storage).
Live migration within cluster nodes.
Live migration between the nodes of two different clusters.
Live storage migration, where you can migrate the VM files (for example, VHD/VHDX, ISO, and VFD files) to update the physical storage or address bottlenecks in storage performance. Storage can be added to either an isolated Hyper-V host or a Hyper-V cluster, and then, the VMs can be live-migrated (moved) to the new storage.
Live VSM, where you can use live system migration (VSM) to migrate both the ...
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