| 摘要 |
PURPOSE:To report a position, up to which commands are already processed, to the user when the system down is recovered, by writing the processing state due to commands of each user in a mail box storage part. CONSTITUTION:When a command is issued from a terminal equipment 5-0, a CPU1 fetches desired data into a main storage device by the function of a data base access control part 6 and uses this data to execute the processing corresponding to the command. Meanwhile, the CPU records data in a logging file 4 before and/or after this processing. A mail box storage part 7 which has processing mode information storage areas 8i in accordance with terminal equipments 5i is prepared to report a position, up to which commands are executed correctly when the system down occurs, to each user for recovery of the system, and the main box storage part 7 is utilized in accodance with individual commands. |
