| 摘要 |
PURPOSE:To prevent generation of a deadlock or breakdown of contents of a data base, by making each terminal execute an independent processing, and executing a steady lock in a temporary save memory part. CONSTITUTION:When a terminal TRLA requests a processing regarding a data base, an exclusive control part EXC in an operating system OS receives its command, and checks whether other terminals TRLB-TRIN are in the course of processing or not. If they are in the cource of processing, the exclusive control is executed, and if they are avaialable, a data group being a processing object is copied. After copying has ended, the copied data group is processed, and after the processing has ended, a check part sends out the processing result to the terminal so as to be checked, as necessary. When a data base updating permission command is inputted from a terminal operator, a data base updating part RUP returns the processed result to a data base in a large memory device DBF. In the event of an updating non-permission command, its reprocessing is requested to a processing part DBP. |
