Replication and Recovery Mechanisms for Strong Replica Consistency in Reliable Distributed Systems

摘要

The Eternal system is middleware that provides transparent fault tolerance for CORBA applications, without requiring the modification of either the application or the ORB. Eternal replicates the application objects, and facilitates replica consistency through the use of reliable totally ordered multicast messages for the communication of operations. Replication and recovery in Eternal involves the logging of invocations and responses, the detection and suppression of duplicate operations, and the transfer and synchronization of object state, for both active and passive replication of CORBA client and server objects.