In a distributed file system having a plurality of file servers each associated with a plurality of workstations having cache memories, data locks granted by the file servers to the workstations have variable lock lifetimes that are selected based on system parameters. The parameters selected to determine...http://www.google.com.tw/patents/US5615373?utm_source=gb-gplus-share專利 US5615373 - Data lock management in a distributed file server system determines variable lock lifetime in response to request to access data object
