Data duplication eliminating device, data duplication eliminating method, and data duplication eliminating program

摘要

To reduce the processing load on deduplication.SOLUTION: In a storage, data to be stored includes a content comprising multiple blocks 500. The block 500 is formed by associating transaction data with a hash value of a previous block. The storage includes a storage device and a processor. The processor is configured to: (1) acquire hash values associated with one or more blocks of a chunk including blocks in a content, specify a fingerprint for the chunk on the basis of the acquired hash values of one or more blocks; (2) determine whether the fingerprint for the chunk is the same as a stored chunk stored in the storage device 230; and (3) prevent the chunk from being stored in the storage device 230 when they are the same, or store the chunk in the storage device 230 when they are not the same.SELECTED DRAWING: Figure 1