Fault-tolerance and fault-intolerance: Complementary approaches to reliable computing

Authors:
Algirdas Avižienis
Affiliations:
Computer Science Department, University of California, Los Angeles, Los Angeles, California
Venue:
Proceedings of the international conference on Reliable software
Year:
1975

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Abstract

Two complementary methods whìch are employed in order to assure relìable computing are fault-intolerance and fault-tolerance. Fault-intolerance depends on the elìmìnatìon of the causes of unreliability prior to the start of the computing process while fault-tolerance employs protective redunuancy during the computing process in order to detect and to correct unreliable functìoning. A balanced allocation of reliability resources between the two methods appears to offer the best practical solution. The paper reviews current fault-tolerance practices in system architecture and discusses their relevance to software systems.