“WEST: Wormhole-Enhanced State Transfer”

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Rogério Correia, Paulo Sousa

in Proceedings of the DSN 2009 Workshop on Proactive Failure Avoidance, Recovery and Maintenance (PFARM), Estoril, Portugal, June 2009., Jun. 2009.

Abstract: This paper presents WEST, an efficient state transfer protocol for Byzantine fault-tolerant state machine replication systems enhanced with proactive-reactive recovery. Usually the recovery of a stateful replica consumes a considerable amount of time, mostly due to state transfer. As a result it is essential to reduce the state transfer time, simultaneously guaranteeing that correct replicas never lose their state. Our approach consists on creating periodic state checkpoints stored in a distributed secure component (wormhole), and relying on this component to manage/control state transfer operations. Preliminary evaluation results show the performance and overhead of the proposed protocol.

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Research line(s): Fault And Intrusion Tolerance in Open Distributed Systems (FIT)

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