A method and mechanisms for checkpointing objects, processes and other components of a multithreaded application program, based on the leader-follower strategy of semi-active or passive replication, where it is not possible to stop and checkpoint all of the threads of the object, process or other component...http://www.google.com/patents/US7206964?utm_source=gb-gplus-sharePatent US7206964 - Consistent asynchronous checkpointing of multithreaded application programs based on semi-active or passive replication