Information processing system capable easily of taking over processing from a failed processor

摘要

The invention relates to an information processing system capable easily of taking over processing from a failed processor. …??The system comprises several processor units each of which includes a memory unit, an execution processor, an information transfer unit and a bus line connected from one to the other, the memory unit has a control information area and a data area for storing a control information signal and a main data signal, respectively, and a backup area for backing up the main data signal; when the signal copied is backed-up into the backup area, an information transfer unit receives, by way of the bus line, the main data signal which is output by the memory unit and which is transferred to the other processor unit; a supplementary data signal is produced by the other processor unit and stored by way of the information transfer unit in the backup area; to the extent that both the main and supplementary data signals are stored in each processor unit, each processor can take over the processing carried out in the other processor unit when the other processor unit is defective. …??Application to computer systems.