
The idea Behind Node Fairness in Hyper-V: How it works and why you need it?
How does it work?
Being triggered, the Node Fairness service determines the current workload on the cluster hosts. If needed, it automatically migrates VMs to the less loaded host.
After the start, the cluster service checks the host for two factors:
If the average host CPU load exceeds the tolerated threshold
If the average host memory utilization is higher than the tolerated threshold
In case either of these criteria is met, the VM gets live migrated to the less loaded host. Neither guest system nor services do experience any downtime.
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