Method and apparatus for fault-tolerant multiprocessing system r

Details Method and apparatus for fault-tolerant multiprocessing system r Method and apparatus for fault-tolerant multiprocessing system r

1994-06-23

1999-07-27

DeCady, Albert

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

714 14, 714 10, G06F 1100

Patent

active

059283688

ABSTRACT:
Multiple processors are connected to form a multiprocessor system having interprocessor communicating capability. In the face of a power-fail signal, indicating that possible power loss is imminent, a processor will proceed through a shut-down procedure to save the present operating state so that when power is re-applied the processor can continue from the operating state it left when power was lost. The shut-down procedure concludes with the processor broadcasting messages to all other processors that it is undergoing a power-fail shut-down which is noted by the other processors to later cause them to enter a cautious mode of operation so as to not exclude the processor in any system configuration involving agreement of all processors by reason of the processor's loss of power.

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