Microsoft® SQL Server 2012 Unleashed

Understanding WSFC

A server failover cluster is a group of two or more physically separate servers running WSFC and working collectively as a single system. The server failover cluster, in turn, provides high availability, scalability, and manageability for resources and applications. In other words, a group of servers is physically connected via communication hardware (network), shares storage (via SCSI or Fibre Channel connectors), and uses WSFC software to tie them all together into managed resources.

Server failover clusters can preserve client access to applications and resources during failures and planned outages. It is server instance-level failover. If one of the servers in a cluster is unavailable due to failure or maintenance, resources ...