A configuration of two nodes in Microsoft Cluster Server (MSCS). When network clients try to access shared resources or applications on clusters, the cluster appears to the clients as a single server.
MSCS is included with Microsoft Windows NT Server, Enterprise Edition. (For a similar feature in Windows 2000, see Windows Clustering.)
Each node in a cluster is a completely independent computer system that must be running Windows NT Server, Enterprise Edition. These nodes are connected by a shared storage bus such as an external Small Computer System Interface (SCSI) disk subsystem.
Network resources such as applications and shared information can be hosted on only one node at a time, but MSCS supports failover, which allows the resource to be shifted to the other node if one of the nodes in a cluster fails. Failover is controlled by the Cluster service, which runs on both nodes.
Some of the different models for configuring a cluster on MSCS include