Windows Server Failover Clustering

It enables multiple servers to work together as a single system to provide high availability for critical applications. If one server fails, it automatically switches operations to another node, minimizing downtime.

Modern versions of Windows Server support up to 64 physical nodes in a single cluster. This massive scalability allows organizations to host thousands of virtual machines that can failover instantly in an emergency.

A quorum is a voting mechanism used to ensure that only one subset of the cluster is running at a time, preventing split-brain scenarios. It requires a witness, such as a disk or a file share, to help the cluster maintain high availability during network issues.

Yes, clustering is deeply integrated with Hyper-V to provide automatic failover for virtual machines. If a host server experiences a hardware failure, the virtual machines will instantly restart on another node in the cluster.