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Optimal Version Sequencing In Fault-Tolerant Programs

Author

Listed:
  • GREGORY LEVITIN

    (Reliability Department, Planning, Development and Technology Division, Israel Electric Corporation Ltd., P.O. Box 10, Haifa, 31000, Israel)

Abstract

This paper considers software systems consisting of fault-tolerant components. These components are built from functionally equivalent but independently developed versions characterized by different reliability and execution times. Because of resource constraints, the number of versions that can run simultaneously is limited. The expected system execution time and its reliability (defined as probability of obtaining the correct output within a specified time) strictly depends on the sequence of versions execution. Different sequences can provide either maximal system reliability or minimal expected execution time. An optimization procedure is suggested for finding such sequences. The procedure is based on an algorithm for determining system execution time distribution that uses the moment generating function approach and on the genetic algorithm. BothN-version programming and the recovery block scheme are considered within a universal model. An illustrated example is presented.

Suggested Citation

  • Gregory Levitin, 2005. "Optimal Version Sequencing In Fault-Tolerant Programs," Asia-Pacific Journal of Operational Research (APJOR), World Scientific Publishing Co. Pte. Ltd., vol. 22(01), pages 1-18.
    • Handle: RePEc:wsi:apjorx:v:22:y:2005:i:01:n:s0217595905000376
    DOI: 10.1142/S0217595905000376
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    Citations

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    Cited by:

    1. Yamachi, Hidemi & Tsujimura, Yasuhiro & Kambayashi, Yasushi & Yamamoto, Hisashi, 2006. "Multi-objective genetic algorithm for solving N-version program design problem," Reliability Engineering and System Safety, Elsevier, vol. 91(9), pages 1083-1094.
    2. Levitin, Gregory & Xie, Min & Zhang, Tieling, 2007. "Reliability of fault-tolerant systems with parallel task processing," European Journal of Operational Research, Elsevier, vol. 177(1), pages 420-430, February.
    3. Wattanapongskorn, Naruemon & Coit, David W., 2007. "Fault-tolerant embedded system design and optimization considering reliability estimation uncertainty," Reliability Engineering and System Safety, Elsevier, vol. 92(4), pages 395-407.
    4. Levitin, Gregory, 2006. "Reliability and performance analysis of hardware–software systems with fault-tolerant software components," Reliability Engineering and System Safety, Elsevier, vol. 91(5), pages 570-579.

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