Abstract
An algorithm called RAFT (recursive algorithm for fault tolerance) for achieving fault tolerance in multiprocessor systems is described. Through the use of a combination of dynamic space- and time- redundancy techniques, RAFT achieves fault tolerance in the presence of permanent as well as intermittent faults. Performance and reliability of multiprocessor systems using RAFT are determined as a function of individual processor reliability and the total number of fault modes in a processor. RAFT-based systems are superior to triple modular redundancy (TMR) systems in hardware economy and provide comparable reliability. A multiprocessor architecture adopting RAFT is given.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
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