Resourceful systems for fault tolerance, reliability, and safety

Author:

Abbott Russell J.1

Affiliation:

1. The Aerospace Corp., Los Angeles, CA

Abstract

Above all, it is vital to recognize that completely guaranteed behavior is impossible and that there are inherent risks in relying on computer systems in critical environments. The unforeseen consequences are often the most disastrous [Neumann 1986]. Section 1 of this survey reviews the current state of the art of system reliability, safety, and fault tolerance. The emphasis is on the contribution of software to these areas. Section 2 reviews current approaches to software fault tolerance. It discusses why some of the assumptions underlying hardware fault tolerance do not hold for software. It argues that the current software fault tolerance techniques are more accurately thought of as delayed debugging than as fault tolerance. It goes on to show that in providing both backtracking and executable specifications, logic programming offers most of the tools currently used in software fault tolerance. Section 3 presents a generalization of the recovery block approach to software fault tolerance, called resourceful systems . Systems are resourceful if they are able to determine whether they have achieved their goals or, if not, to develop and carry out alternate plans. Section 3 develops an approach to designing resourceful systems based upon a functionally rich architecture and an explicit goal orientation.

Publisher

Association for Computing Machinery (ACM)

Subject

General Computer Science,Theoretical Computer Science

Reference52 articles.

1. ABBOTT R. J. 1986. An Integrated Approach to Software Development. John Wiley & Sons New York. ABBOTT R. J. 1986. An Integrated Approach to Software Development. John Wiley & Sons New York.

2. Evaluation of competent software reliability predictions;ABDEL-GHALY A. A.;IEEE Trans. Softw. Eng. SE-12,1986

3. ANDERSON T. 1985. Resilient Computing Systems vol. I. John Wiley & Sons New York. ANDERSON T. 1985. Resilient Computing Systems vol. I. John Wiley & Sons New York.

4. ANDERSON T. AND LEE P. A. 1981. Fault Tolerance Principles and Practice. Prentice/Hall International London. ANDERSON T. AND LEE P. A. 1981. Fault Tolerance Principles and Practice. Prentice/Hall International London.

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