Implementing a replicated service with group communication
Journal of Systems Architecture: the EUROMICRO Journal
Scaling optimistic replication
Future directions in distributed computing
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Many wide-area distributed applications can be implemented using distributed group communication, a mechanism for coordinating the activities of related processes running at different sites. We have developed a modular architecture for group communication systems that can be used to build a system tailored to application requirements. We focus on *weak consistency* mechanisms for group communication, since these allow highly efficient operation on wide-area internetworks. We examine several design choices that can be made in building a weakly-consistent group communication mechanism, and discuss the decisions we made in building two very different wide-area applications. The architecture accommodates both systems well, and allows several application-specific decisions that increase efficiency and flexibility.