We currently have a large deployment of XenServer with roughly 32 hosts on 4 clusters. We are slowly looking to move to hyper v after some testing and live deployments that are running very well with Veeam backups which was a big selling point.
My Question is, why should i cluster the Hyper V servers? I’ve got 8 hyper v servers and have set them up for shared nothing live migrations using a powershell script got from a book ive been reading, which seems to work quite well.
Why should you cluster them? Because shared nothing Live Migration is great for when you want to manually move a virtual machine or script the move of a virtual machine from one host to another but doesn’t do anything if a host fails. If a host fails then all of the virtual machines on that host will fail. Live Migration in and of itself and shared nothing Live Migration don’t provide any failover capability or high availability for your virtual machines. Failover Clustering provides failover capability and high availability for your virtual machines. Live Migration is the mechanism by which virtual machines move from one host to another but Live Migration doesn’t itself provide for any type of automatic failover of virtual machines if a host fails.