Virtual command rollback in a fault tolerant data processing...

Details Virtual command rollback in a fault tolerant data processing... Virtual command rollback in a fault tolerant data processing...

G - Physics

06

F

354/225.2

G06F 11/16 (2006.01) G06F 11/14 (2006.01)

Patent

CA 1255008

VIRTUAL COMMAND ROLLBACK IN A FAULT TOLERANT DATA PROCESSING SYSTEM Abstract of the Disclosure A fault tolerant data processing system including a pair of processors for simultaneously executing commands for processing data, a memory, and a data transmission bus between the processors and the memory over which the processors may fetch data from and write data to the memory. A comparison circuit is included between the processors for comparing the data fetched and written by the processors. A rollback module is responsive to the comparison circuit for rolling back the operation of the processors to the beginning of a presently executing command in the event of a miscomparison by the comparison circuit.

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