Computer system preventing storage of duplicate files

Abstract

A plurality of contents intrinsic values (8351) that are values intrinsic to respective contents of a plurality of files stored in one or more first storage devices (600) are calculated. Whether two or more identical contents intrinsic values are contained among the plurality of contents intrinsic values is determined. When two or more identical contents intrinsic values are present, an access destination of a first file corresponding to a first contents intrinsic value from among these two or more contents intrinsic values is changed to a position having stored therein a second file corresponding to a second contents intrinsic value from among these two or more contents intrinsic values.

Description

technical field [0001] The invention relates to storage control technology of electronic files. Background technique [0002] For example, a NAS (Network Attached Storage) node (for example, a file server) manages a file, and the substance of the file is stored in a storage device inside or outside the NAS node. [0003] Generally, even if the contents of the files are the same, they can be stored in the storage device if the file names are different. In this case, since files with exactly the same contents are stored in the storage device (that is, completely), parts of the files are repeated, and the storage capacity is wasted. Therefore, there are technologies disclosed in Patent Documents 1 and 2, for example, as storage control techniques for preventing duplicate storage of files. Patent Documents 1 and 2 disclose, for example, the following. [0004] There are a host and a storage device, and the host has an application program and a dedicated API (Application Progr...

AI Technical Summary

Problems solved by technology

In this case, because the file with exactly the same content is stored in the storage device (that is, completely), the part of the file is repeated, and the storage capacity is wasted.

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