| 摘要 |
PURPOSE:To maintain the identity of the duplicate data by making the logic time of the privileged computer equal to the logic time of other computers. CONSTITUTION:Counter control unit 1 receives the end information of the logic time alteration from the computers other than the privileged computer through therminal 2, advances the contents by one for logic time counter 3 which counts the information of the logic time alteration of the computers other than the privileged computer, and then informes the alteration of the logic time to logic time control unit 4. Unit 4 consists of coincidence circuit 41 and alteration deciding circuit 42, checks the coincidence of the value between counter 3 and the computers other than the privileged computer, advances the logic time of the privileged cimputer by one when the coincidence of the value is obtained, and gives an order through terminal 5 the computers other than the priviledged computer to advance their logic time. As a result, the logical synchronism of the logic time can be secured between the privileged compter and other computers. |
