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Designing Hyper-V Solutions by Saurabh Grover

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A virtual machine's high availability and mobility

The purpose of Microsoft failover clustering is to provide high availability and fault tolerance to the R2 Hyper-V cluster. Alternatively, we can create a VM on the cluster itself, and thereby create a highly available VM. This takes care of the availability of the VM, but failing over would require restarting of the VM on the passive node, which may just—only just— sound feasible in the event of the primary node going down with an acceptable turnaround time. However, in situations involving maintenance of the cluster infrastructure, you cannot afford to take down VMs to load them onto a different node. You migrate them live and running to an other running node (well, until Windows Server 2012) ...

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