| 摘要 |
PURPOSE:To achieve a continuous operation without on-line data even if a computer is in failure, by transferring a data from a computer processing an on-line job and storing in a bulk memory of both series. CONSTITUTION:In making maintenance of data at a bulk memory of a two- system computer system 2, a working file 28 is provided corresponding to an on- line file 27, and a data renewal 41 is executed to this working file. A 1 system computer 1 makes processings such as monitor and storage of a power system with an on-line file 17 in the bulk memory 15 and writes in the newest information 40 at all times with dual-write to an on-line file 27 in the bulk memory 25 in other computer system 2. In the 2-system computer, the information being during maintenance is formed and stored in a keyword 29. The data for correspondence such as provision of the working file 28 to the on-line file 27 is formed and it is stored in a maintenance number list 30. |
