| 摘要 |
PURPOSE: To provide a redundant computer system switching method capable of more economically attaining system reliability equivalent to or more than conventional one. CONSTITUTION: Primary stand-by computers 102, 112, 122, 132 fixedly allocated to current computers 101, 111, 121, 131 to execute high speed backup are connected to a transmission line 160 and secondary stand-by computers 141, 142 for improving the reliability of the system are also connected to the transmission line 160 so as to be shared by all the current computers 102, 112, 122, 132 and the primary stand-by computers 101, 111, 121, 131. In order to secure the reliability of the stand-by computers, all the computers are periodically driven as current computers by a centralized computer managing device 150 at the time of normal operation so as to quickly detect abnormality, and when abnormality is generated in the current computers, the primary stand-by computers 102, 112, 122, 132 are switched to current computers to execute high speed backup and the shared secondary stand-by computers 141, 142 are allocated to the new primary stand-by computers. |
