J. Sussman, I. Keidar, and K. Marzullo. Optimistic virtual synchrony. In Proceedings of the 19th IEEE Symposium on Reliable Distributed Systems (SRDS'00), page 42. IEEE Computer Society, 2000.  Home/Search   Document Details and Download   Summary   Related Articles   Check

....to rely on Virtual Synchrony to avoid participating in a state transfer protocol, this potential delay is also avoided. An extension of Virtual Synchrony, called Optimistic Virtual Synchrony, supports transmission of application messages in parallel with formation of new views (Sussman et al. in [90, 89]) With Optimistic Virtual Synchrony, the iads application can be modified to avoid the processing delay caused by blocking. 153 154 Conclusions We have developed a formal design of a novel group communication service targeted for WANs. The design implements a variant of the Virtual Synchrony ....

J. Sussman, I. Keidar, and K. Marzullo. Optimistic virtual synchrony. In 19th IEEE International Symposium on Reliable Distributed Systems (SRDS), pages 42--51, October 2000.

....has often been used for relaxing the ordering of messages. For instance lazy replication [17] relies on message semantics to relax causal order. Generic broadcast [19] is a relaxation of total order based on message semantics captured as a binary relation. The work on Optimistic Virtual Synchrony [25] also uses semantic information to alleviate the cost of view changes but, unlike our approach, does not address the issue of limiting the number of these changes. It would be interesting to combine these approaches with our proposal. The Bayou [26] replication system is sensitive to semantics of ....

J. Sussman, I. Keidar, and K. Marzullo. Optimistic virtual synchrony. In Proc. of the Nineteenth IEEE Symp. on Reliable Distributed Systems, pages 42--51, October 2000.

....on a message obsolescence relation dictated by the application. Although for different purposes, application semantics has been used before to optimize group communication protocols. For instance, to relax causal order [8] total order [9, 10] and ordering of message deliveries with view changes [17]. We have presented the definition of a Semantically View Synchronous Multicast 12 primitive and have shown how it can be used in strongly consistent replication using a modified primary backup protocol. The practical relevance of this is illustrated by showing that enforcing consistency does ....

J. Sussman, I. Keidar, and K. Marzullo. Optimistic virtual synchrony. In Proceedings of the Nineteenth IEEE Symposium on Reliable Distributed Systems, pages 42--51, October 2000.

....system sends a view change message to each member. A property basic to most of these systems is that processes (sites) moving together from view v to view v 0 should deliver the same set of messages in view v. Also that every message m be delivered in the same view v by all sites that deliver m [14]. The problem addressed in this paper is that since the multicast based protocols have no 2 Phase Commit (or other atomic commit protocol) a transaction, t 1 , might be committed by operational sites despite the failure of one of the replicas. When the failed site recovers, it has no knowledge of ....

J. Sussman, I. Keidar, and K. Marzullo. Optimistic virtual synchrony. In Proceedings, 19th IEEE Symposium on Reliable Distributed Systems, SRDS2000, pages 42--51, October 2000.

....Xpand system can now serve as a powerful application development infrastructure and as a base for further improvements and optimizations. 7.1 Future Developments Several future enhancements are planned. The VS client can be extended to support the Optimistic Virtual Synchrony semantics (OVS) [12]. OVS allows the user application to send messages while in a recon guration state, where the current implementation blocks. This would improve network utilization and performance. Based on the information provided in the start change message, the OVS client can send messages optimistically before ....

J. Sussman, I. Keidar, and K. Marzullo. Optimistic virtual synchrony. In 19th IEEE International Symposium on Reliable Distributed Systems (SRDS), October

No context found.

J. Sussman, I. Keidar, and K. Marzullo. Optimistic virtual synchrony. In Proceedings of the 19th IEEE Symposium on Reliable Distributed Systems (SRDS'00), page 42. IEEE Computer Society, 2000.

No context found.

J. Sussman, I. Keidar, and K. Marzullo. Optimistic virtual synchrony. In IEEE International Symposium on Reliable Distributed Systems, October 2000.

Online articles have much greater impact   More about CiteSeer.IST   Add search form to your site   Submit documents   Feedback  

CiteSeer.IST - Copyright Penn State and NEC