Low-cost flexible software fault tolerance for distributed computing

Ann T. Tai, Kam S. Tso, William H. Sanders, Leon Alkalai, Savio N. Chau

Research output: Contribution to journalArticlepeer-review


In this paper, we revisit the problem of software fault tolerance in distributed systems. In particular, we propose an extension of a message-driven confidence-driven (MDCD) protocol we have developed for error containment and recovery in a particular type of distributed embedded system. More specifically we augment the original MDCD protocol by introducing the method of “fine-grained confidence adjustment," which enables us to remove the architectural restrictions. The dynamic nature of the MDCD approach gives it a number of desirable characteristics. First, this approach does not impose any restrictions on interactions among application software components or require costly message-exchange based process coordination/synchronization. Second, the algorithms allow redundancies to be applied only to low-confidence or critical interacting software components in a distributed system, permitting flexible realization of software fault tolerance. Finally, the dynamic error containment and recovery mechanisms are transparent to the application and ready to be implemented by generic middleware.

Original languageEnglish (US)
Pages (from-to)148-157
Number of pages10
JournalProceedings of the International Symposium on Software Reliability Engineering, ISSRE
StatePublished - 2001

ASJC Scopus subject areas

  • Software


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