SFCFS Administration

The VERITAS Cluster File System (CFS) is a shared file system that enables multiple hosts to mount and perform file operations concurrently on the same file. To operate in a cluster configuration, CFS requires the integrated set of VERITAS products included in the VERITAS Storage Foundation Cluster File System (SFCFS).

To configure a cluster, CFS requires the VERITAS Cluster Server (VCS). VCS supplies two major components integral to CFS. The Low Latency Transport (LLT) package provides node-to-node communications and monitors network communications. The Group Membership and Atomic Broadcast (GAB) package provides cluster state, configuration, and membership service, and monitors the heartbeat links between systems to ensure that they are active. There are several other packages supplied by VCS that provide application failover support (see Packages Installed with SFCFS Only) when installing SFCFS HA.

CFS also requires the cluster functionality (CVM) of the VERITAS Volume Manager (VxVM) to create the shared volumes necessary for mounting cluster file systems.

Topics in this chapter include:

• VCS Overview
• VCS Messaging---GAB
• VCS Communication---LLT
• CVM Overview
• CFS Overview
• CFS Administration
• Snapshots on CFS