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Efficient Algorithms for Selection of Recovery Points in Tree Task Models
July 1991 (vol. 17 no. 7)
pp. 731-735

Efficient solutions to the problem of optimally selecting recovery points are developed. The solutions are intended for models of computation in which task precedence has a tree structure and a task may fail due to the presence of faults. An algorithm to minimize the expected computation time of the task system under a uniprocessor environment has been developed for the binary tree model. The algorithm has time complexity of O(N/sub 2/), where N is the number of tasks, while previously reported procedures have exponential time requirements. The results are generalized for an arbitrary tree model.

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Index Terms:
tree task models; recovery points; task precedence; tree structure; uniprocessor environment; binary tree model; time complexity; exponential time requirements; arbitrary tree model; computational complexity; optimisation; trees (mathematics)
S.K. Mishra, V.V. Raghavan, N.-F. Tzeng, "Efficient Algorithms for Selection of Recovery Points in Tree Task Models," IEEE Transactions on Software Engineering, vol. 17, no. 7, pp. 731-735, July 1991, doi:10.1109/32.83909
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