A system for managing locks that give permission to access resources in a computer system is disclosed. The lock management system is distributed and provides deadlock protection. The lock management system is distributed in that information about which locks have been granted for a resource is stored...http://www.google.de/patents/US6715146?utm_source=gb-gplus-sharePatent US6715146 - Efficiently distributing information used for lock management among distributed resource objects using sequence numbers
