The Delta-4 extra performance architecture (XPA)

P. A. Barret, A. M. Hilborne, P. G. Bond, D. T. Seaton, P. Verissimo, L. Rodrigues, N. A. Speirs

Research output: Chapter in Book/Report/Conference proceedingConference contribution

52 Scopus citations


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.
Original languageEnglish (US)
Title of host publicationDigest of Papers - FTCS (Fault-Tolerant Computing Symposium)
PublisherPubl by IEEEPiscataway, NJ, United States
Number of pages8
ISBN (Print)081862051X
StatePublished - Dec 1 1990
Externally publishedYes


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