| 摘要 |
There is disclosed a fault tolerant duplex computer system capable of increasing accuracy of processing to be continued by collecting trouble information without stopping duplex running. CPU's ( 112, 122 ), memories ( 113, 123 ), and IO processors ( 114, 124 ) of systems ( 110, 120 ) announce a reparable trouble to fault diagnosis processors ( 116, 126 ) when the generated trouble can be repaired, and an irreparable trouble when the generated trouble cannot be repaired. When an out-of-sync situation is confirmed, the out-of-sync situation is announced. A fault monitoring section ( 130 ) updates reparable trouble information ( 131 ) of a relevant system when the reparable trouble is received, and irreparable trouble information ( 132 ) of a relevant system when the irreparable trouble is received. Upon reception of the out-of-sync situation, a synchronous processing instruction is made by setting the system of a smaller amount of trouble information as an active system and the system of a larger number of trouble information as a standby system.
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