| 摘要 |
PROBLEM TO BE SOLVED: To improve efficiency for using storage areas for the data of maintenance operation. SOLUTION: For each piece of data to be stored in a managing data filing part 60, it is defined whether these data can be compressed or not, and this definition is set to a data control definition part 20. When writing any arbitrary data in the managing data filing part 60, based on the definition at the data control definition part 20, correspondent write processing is performed corresponding to whether these data can be compressed or not. When reading any arbitrary data out of the managing data filing part 60, on the other hand, it is discriminated whether these data are compressed or not while referring to the data control definition part 20 as well. When they are compressed, extension processing is performed, and a response is applied to a data read request source. |
