A network file server includes a first set of data processors for receiving requests from clients, and a second set of data processors for accessing read-write file systems. A respective data processor in the second set is assigned to each file system for exclusive management of locks on the file system....http://www.google.ca/patents/US6275953?utm_source=gb-gplus-sharePatent US6275953 - Recovery from failure of a data processor in a network server
