12.2. Benefits of migrating virtual machines

Migrating virtual machines (VMs) can be useful for:

Load balancing: VMs can be moved to host machines with lower usage if their host becomes overloaded, or if another host is under-utilized.
Hardware independence: When you need to upgrade, add, or remove hardware devices on the host machine, you can safely relocate VMs to other hosts. This means that VMs do not experience any downtime for hardware improvements.
Energy saving: VMs can be redistributed to other hosts, and the unloaded host systems can thus be powered off to save energy and cut costs during low usage periods.
Geographic migration: VMs can be moved to another physical location for lower latency or when required for other reasons.