ML p(r)ior | Number of faults a system can withstand without repairs
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Number of faults a system can withstand without repairs

1994-09-19
We consider the following scheduling problem. A system is composed of $n$ processors drawn from a pool of $N$. The processors can become faulty while in operation and faulty processors never recover. A report is issued whenever a fault occurs. This report states only the existence of a fault, but does not indicate its location. Based on this report, the scheduler can reconfigure the system and choose another set of $n$ processors. The system operates satisfactorily as long as at most $f$ of the $n$ selected processors are faulty. We exhibit a scheduling strategy allowing the system to operate satisfactorily until approximately $(N/n)f$ faults are reported in the worst case. Our precise bound is tight.
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