File storage system and method for managing duplicate files in file storage system

A method for managing duplicate files in a file storage system, the method comprising:

• determining whether a file identical to a new file in terms of a first criterion for a quick examination of identical duplicate files is present among files each having duplicate files equal to a preset number, wherein the new file is requested to be duplicated from a client;
• and
• limiting a number of duplicate files of the file, which is identical to the new file in terms of the first criterion, to a preset number according to a result of the determination.

A metadata server comprising:

• a file information management unit including a file information management table for storing information associated with files each having duplicate files equal to a preset number, and metafiles including meta-information associated with all of the related files, and information associated with the file information management table;
• and
• a control unit for generating a metafile in response to a request for generating a duplicate file of a new file being stored from a client and inspecting the file information management table to limit a number of identical duplicate files to the preset number.