End-to-End Latency of a Fault-Tolerant CORBA Infrastructure

This paper presents measured probability density functions (pdfs) for the end-to-end latency of two-way remote method invocations from a CORBA client to a replicated CORBA server in a fault-tolerance infrastructure. The infrastructure uses a multicast group-communication protocol based on a logical token-passing ring imposed on a single local-area network. The measurements show that the peaks of the pdfs for the latency are affected by the presence of duplicate messages for active replication, and by the position of the primary server replica on the ring for semi-active and passive replication. Because a node cannot broadcast a user message until it receives the token, up to two complete token rotations can contribute to the end-to-end latency seen by the client for synchronous remote method invocations, depending on the server processing time and the interval between two consecutive client invocations. For semi-active and passive replication, careful placement of the primary server r...

• Type: Conference
• Year: 2002
• Where: ISORC
• Authors: Wenbing Zhao, Louise E. Moser, P. M. Melliar-Smith
• Keywords: Distributed And Parallel Computing, End-to-end Latency, ISORC 2002, Passive Replication, Remote Method Invocations