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Published in:
2005 | OriginalPaper | Chapter
Extending the UMIOP Specification for Reliable Multicast in CORBA
Authors : Alysson Neves Bessani, Joni da Silva Fraga, Lau Cheuk Lung
Published in: On the Move to Meaningful Internet Systems 2005: CoopIS, DOA, and ODBASE
Publisher: Springer Berlin Heidelberg
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OMG has published an unreliable multicast specification for distributed applications developed in CORBA (UMIOP). This mechanism can be implemented based on IP Multicast, a best-effort protocol, which provides no guarantees about the message delivery. However, many fault-tolerant or groupware applications demand more restrictive agreement and ordering guarantees (for instance, reliable multicast with FIFO, causal or total ordering) from the available support for group communication. OMG has not yet provided any specification for supporting those requirements. This paper presents an important contribution towards this direction. We proposed the ReMIOP, an extension to the UMIOP/OMG protocol, for the conception of a reliable multicast mechanism in CORBA middleware. Performance measures comparing ReMIOP, UMIOP and UDP sockets for IP multicast communication are presented in order to evidence the costs for adding reliable and unreliable multicast in middleware level.