| 摘要 |
PURPOSE:To decrease considerably the processing time when the presence is detected for the desired file control information and to decrease the I/O frequencies, by making use of the result of the hash processing in an overlap check mode or a reference processing mode, etc. CONSTITUTION:A control program 2 performs the hash processing through a hash processing mechanism 12 according to the file name allocated to a job 1-i. Based on the result of this hash processing, the contents of the corresponding file name control area 13'-n are checked by a box search processing mechanism 16. In this case, a common spare box search processing mechanism also works to check the contents of a file name control area 14'-O, etc. An error is decided in case the same file names are already registered. When the same file names are not detected, a box contents processing mechanism works to register file names to the area 13'-n, 14'-0, etc. At the same time, the necessary file control information is stored on a file control area 15. |
