公开(公告)号：JPH06208477A

公开(公告)日：1994-07-26

申请号：JP40589990

申请日：1990-12-25

Applicant: TANDEM COMPUTERS INC

Inventor： DAGURASU II JIYUETSUTO ,  TOMU BEREITAA ,  BURAIAN BUETAA ,  RANDARU JII BANTON ,  RICHIYAADO DABURIYU KATSUTSU J ,  DONARUDO SHII UESUTOBURUTSUKU ,  KIRAN DABURIYU FUEI JIYUNIA ,  JIYON POZUROO ,  KENESU SHII DOUBATSUKAA ,  NIKUHERU EI MEETA ,  FUIRU UEBUSUTAA ,  DEIBU ARUDORITSUJI ,  PIITAA SHII NOOUTSUDO

IPC: G06F1/30 ,  G06F11/00 ,  G06F11/14 ,  G06F11/18 ,  G06F11/22 ,  G06F12/16 ,  G06F15/16

Abstract: PURPOSE: To improve the reliability of a fault-tolerant computer by securing the operating ability of the computer at a high level by detecting the component of a system which gets out of order and setting the component in an off-line state so that the component can be reincorporated without shutting down the system. CONSTITUTION: A system is provided with a plurality of CPUs 11, 12, and 13 which execute the same instruction stream and each CPU is provided with a local memory 16 and operated to access a plurality of global memories 14 and 15. When, for example, the error of one CPU 11 is detected, the CPU 11 is isolated from the system and the execution of the instruction stream is continued, and then, the operation is continued by accessing the memories 14 and 15 from the other CPUs 12 and 13. When the CPU 11 is remedied, the CPU 11 is first made to be operable by synchronizing the CPU 11 to the CPUs 12 and 13, and then, the CPU 11 is restored so that the state and local memory 16 of the CPU 11 can become the same as those of the CPUs 12 and 13.