NDLI: Using certification trails to achieve software fault tolerance

Content Provider	IEEE Xplore Digital Library
Author	Sullivan, G.F. Masson, G.M.
Copyright Year	1990
Description	Author affiliation: Dept. of Comput. Sci., Johns Hopkins Univ., Baltimore, MD, USA (Sullivan, G.F.; Masson, G.M.)
Abstract	A technique for achieving fault tolerance in hardware and software systems is introduced. When used for software fault tolerance, this technique uses time and software redundancy and can be outlined as follows. In the initial phase, a program is run to solve a problem and store the results. In addition, this program leaves behind a trail of data, called a certification trail. In the second phase, another program is run, and it solves the original problem again. This program, however, has access to the certification trail left by the first program. Because of the availability of the certification trail, the second phase can be performed by a less complex program and can execute more quickly. In the final phase, the two results are compared, and if they agree, the results are accepted as correct; otherwise, an error is indicated. Cases in which the second phase can be run concurrently with the first and act as a monitor are discussed.<>
Starting Page	423
Ending Page	431
File Size	652401
Page Count	9
File Format	PDF
ISBN	081862051X
DOI	10.1109/FTCS.1990.89397
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1990-06-26
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Certification Fault tolerance Error correction Fault detection Hardware Redundancy Fault tolerant systems Computer science Availability Monitoring
Content Type	Text
Resource Type	Article

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