P. Barrett, Andrew M. Hilborne, P. Bond, Douglas T. Seaton, P. Veríssimo, Luís E. T. Rodrigues, N. Speirs
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The design of an extra performance architecture for Delta-4, which explicitly supports the requirements of real-time systems with respect to throughput and response, is presented. The Delta-4 approach to fault tolerance is based on the replication of software components on distinct host computers using a range of different replication strategies. The problems of replicate divergence are discussed, and a solution based on message selection and preemption synchronization messages is proposed. A description of the ongoing implementation of such a system within the overall Delta-4 framework is included.<>
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