A state management system preserves a state for a cluster of file servers in a cluster file system in the presence of load balancing, failover, and fail-back events. The system provides a file and record locking solution for a clustered network attached storage system running on top of a cluster file...http://www.google.de/patents/US20060212453?utm_source=gb-gplus-sharePatent US20060212453 - System and method for preserving state for a cluster of data servers in the presence of load-balancing, failover, and fail-back events
