A group communication protocol for CORBA

Group communication protocols are used in fault-tolerant systems to maintain strong replica consistency. The Fault-Tolerant Multicast Protocol (FTMP) described here is a group communication protocol specifically designed for the common object request broker architecture (CORBA). FTMP operates over IP Multicast, and consists of the reliable Multicast protocol (RMP) that provides reliable source-ordered message delivery, the reliable ordered Multicast protocol (ROMP) that provides reliable totally-ordered message delivery, and the processor group membership protocol (PGMP) that provides processor group membership services.