CONTROL METHOD FOR INFORMATION PROCESSING SYSTEM, INFORMATION PROCESSING SYSTEM, CONTROL PROGRAM FOR INFORMATION PROCESSING SYSTEM, AND REDUNDANT CONFIGURATION CONTROL DEVICE

摘要

PPROBLEM TO BE SOLVED: To improve the usability of an information processing system, in a state such that output results of a plurality of processors of redundant configuration which perform equivalent operations are mismatched, even though there is no detection of failure in the plurality of processors. PSOLUTION: The information processing system 10, including a 0-series processor 20 and an 1-series processor 30 which perform mutually equivalent operations and a redundant configuration control device 40 selectively connecting one of them to a peripheral system 60, comprises a power source monitoring device 23 and a power source monitoring device 33 which monitor the voltage fluctuations of a power source 22 of the processor 20 and a power source 32 of the processor 30. When input and output information 24 and input and output information 34 of the processor 20 and the processor 30 do not match each other, in spite of no detection of error in the both, the output and input information of the one with smaller voltage fluctuation is selectively connected to the peripheral system 60, whereby the operation of the information processing system 10 is continued. PCOPYRIGHT: (C)2006,JPO&NCIPI