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Software fault-tolerance by design diversity DEDIX: A tool for experimentsThe use of multiple versions of a computer program, independently designed from a common specification, to reduce the effects of an error is discussed. If these versions are designed by independent programming teams, it is expected that a fault in one version will not have the same behavior as any fault in the other versions. Since the errors in the output of the versions are different and uncorrelated, it is possible to run the versions concurrently, cross-check their results at prespecified points, and mask errors. A DEsign DIversity eXperiments (DEDIX) testbed was implemented to study the influence of common mode errors which can result in a failure of the entire system. The layered design of DEDIX and its decision algorithm are described.
Document ID
19860020091
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Avizienis, A. (Societe Nationale Industrielle Aerospatiale Toulouse, France)
Gunningberg, P. (Societe Nationale Industrielle Aerospatiale Toulouse, France)
Kelly, J. P. J. (Societe Nationale Industrielle Aerospatiale Toulouse, France)
Lyu, R. T. (Societe Nationale Industrielle Aerospatiale Toulouse, France)
Strigini, L. (Societe Nationale Industrielle Aerospatiale Toulouse, France)
Traverse, P. J. (Societe Nationale Industrielle Aerospatiale Toulouse, France)
Tso, K. S. (Societe Nationale Industrielle Aerospatiale Toulouse, France)
Voges, U. (Societe Nationale Industrielle Aerospatiale Toulouse, France)
Date Acquired
September 5, 2013
Publication Date
January 1, 1986
Subject Category
Computer Programming And Software
Report/Patent Number
SNIAS-861-111-108
NAS 1.26:177172
NASA-CR-177172
Meeting Information
Meeting: SAFECOMP 85
Location: Como
Country: Italy
Start Date: October 1, 1985
End Date: October 3, 1985
Accession Number
86N29563
Funding Number(s)
CONTRACT_GRANT: NAG1-512
CONTRACT_GRANT: NSF MCS-81-21696
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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