| 摘要 |
It is an objective of the present invention to provide a solution to automatically remove the redundancy among the user's files, and to efficiently use the memory area of the server without placing an unreasonable cost on a service provider and on a user. In order to attain the above objective, a file storage apparatus, which replaces a bit sequence, which matches a bit sequence correlated with a code and managed, with said code, thereby performing compression and storage of a file correlated with the user identification information and inputted, comprising a distribution unit for management cost, which performs distribution of management cost with respect to each user identification information, is provided. Here, the management cost for code and/or bit sequence corresponds to cost necessary for storage or maintenance of the code and/or bit sequence. Examples of the cost include cost for size of required storage area, and cost for required operation of CPU.
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