| 摘要 |
PURPOSE:To maintain the identity of the duplicate data by making the logic time of the computers other than the privileged computer equal to the logic time of the privileged computer. CONSTITUTION:Table control unit 1 receives the information of the logic time alteration for the computers other than the privileged computer through terminal 2, alters the contents of logic time table 3 comprising counters 3.1-3.n which are equal in number to all computers, and then informs the alteration to logic time control unit 4. Unit 4 is started by unit 1 to check the contents of table 3 and then advances the ligic time of the privileged computer by one when the logic time all computers except for the privileged computer becomes identical to the logic time of the privileged computer. At the same time, unit 4 gives the order to all computers except for the privileged computer through terminal 5 to indicate to advance the logic time of them. Thus, the logical synchronism of the ligic time can be secured between the privileged computer and other computers. |
