In the previous chapter we looked at the the migration of Hyper-V virtual machines that required the virtual machine to be powered off or
in a saved state . Microsoft, oddly enough, refer to this technique as ''Quick Migration''. The downside to this approach is that any service provided by the virtual machine is interrupted during the migration process, hardly an acceptable solution in mission critical and enterprise level environments.
Fortunately Hyper-V 2008 R2 introduced a feature called ''Live Migration'' whereby a running virtual machine can be migrated from one host system to another with no interruption in service.
In this chapter we will look in detail at the system requirements and steps in involved in performing a live migration using Hyper-V 2008 R2.