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An environment for developing fault-tolerant software

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2 Author(s)
J. M. Purtilo ; Dept. of Comput. Sci., Maryland Univ., College Park, MD, USA ; P. Jalote

An environment that supports execution of programs using both N-version programming and recovery blocks in a uniform manner is described. For N-version programming, the system offers an easy and flexible way of specifying the target machines for the separate versions. The basic unit of fault tolerance supported by this system is at the procedure or function level. Each such program unit can be packaged as its own task, and different fault tolerance techniques can subsequently be employed, even within the same application. The environment also allows versions to be written in different programming languages and executed on different machines. This enhances the independence between the different versions, making the fault tolerance techniques more effective. This environment has been developed for use on Unix-based hosts and currently runs on a network of Sun and DEC workstations

Published in:

IEEE Transactions on Software Engineering  (Volume:17 ,  Issue: 2 )