Spare Allocation and Reconfiguration in a Fault Tolerant Hypercube with Direct Connect Capability

This paper investigates hardware reconjiguratzon schemes to make the hypercube multicomputer fault tolerant. Two schemes are proposed; the Cluster Approach and the Enhanced Cluster Approach. The approaches are shown to be able to tolerate large number of failures without any performance deg,radation. It is further demonstrated that no modification to either the existing communication or computaitional algorithm is needed. Finally a gracefully degmdable approach is presented to reconfigure when the number of faulty nodes are more than the available spares.