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On designing and reconfiguring k-fault-tolerant tree architectures

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2 Author(s)
Dutt, S. ; Dept. of Electr. Eng. & Comput. Sci., Michigan Univ., Ann Arbor, MI, USA ; Hayes, J.P.

A general approach to designing tree structured multiprocessors with optimal or near-optimal fault tolerance properties is developed. A multiprocessor architecture with a static interconnection network is represented by a graph whose nodes are processors and whose edges are interprocessor communication links. The design of k-fault-tolerant (FT) trees for arbitrary k is considered, with the primary goal of minimizing the number of spare nodes and edges. Also presented are strategies for reconfiguring a k -FT supergraph of a tree T around faults to obtain a fault-free tree isomorphic to T. A systematic methodology is presented for designing k-FT nonhomogeneous symmetry d-ary trees based on a concept termed node covering. The designs are shown to be optimal when k<d and near-optimal otherwise. It is also shown that these k-FT designs can be implemented efficiently using switches to share redundant links

Published in:

Computers, IEEE Transactions on  (Volume:39 ,  Issue: 4 )

Date of Publication:

Apr 1990

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