Fenwick & West LLP
Filesystem failover in a single system image environment
 A method and apparatus for transparent failover of a filesystem within a computer cluster is provided. For failover protection, a filesystem is physically connected to an active server node and a standby server node. A cluster file system provides distributed access to the filesystem throughout the computer cluster. The cluster file system monitors the progress of each operation performed on the failover protected filesystem. If the active server node should fail during an operation, all processes performing operations on the failover protected filesystem are caused to sleep. The filesystem is then relocated to the standby server node. The cluster file system then awakens each sleeping process and retries each pending operation. 
Compaq Computer Corp.
G
G06F
inventional
William W. John A. David B. Bruce J. Laura L. John L.
Chow Gertwagen Zafman Walker Ramirez Byrne