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Lookup NU author(s): Professor Brian Randell
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The demand for highly reliable computer systems has led to techniques for the construction of fault-tolerant software systems. A fault-tolerant system detects errors created as the effects of a fault and applies error recovery provisions in the form of abnormal or exceptional mechanisms and algorithms to continue operation and resume normal computation. Backward error recovery is intended to restore a system state which occurred prior to the manifestation of the fault. Forward error recovery is intended to correct or isolate specific errors and is accomplished in the system state containing the errors. The organisation and control of error recovery in anynchronous systems is very complex. Nevertheless, it is possible to limit this complexity by appropriate structuring aids. Techniques for structuring backward error recovery are comparatively well understood. This paper proposes techniques for structuring forward error recovery measures in asynchronous systems and generalizes recent ideas of atomic actions (transactions) so as to support fault-tolerant interactions between processes.
Author(s): Campbell RH, Randell B
Publication type: Article
Publication status: Published
Journal: IEEE Transactions on Software Engineering
ISSN (print): 0098-5589
ISSN (electronic): 1939-3520
Publisher: IEEE Computer Society