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AssigneeHitachi, Ltd.
InventorsShimpei Nomura, Mitsuo Hayasaka, Jun Nemoto
Estimating the term…
A data deduplication device reduces a processing load in deduplication. Storage target data includes a content including a plurality of blocks having a structure in which transaction data and a hash value of a preceding block are associated with each other. A storage includes a storage device and a processor, which (1) acquires a hash value associated with one or more blocks of a chunk including the block in the content, and specifies a fingerprint corresponding to the chunk based on the acquired one or more hash values of the block, (2) determines whether the fingerprint corresponding to the chunk is the same as a fingerprint of a chunk stored in the storage device, and (3) does not store the chunk in the storage device when it is determined to be the same, and stores the chunk in the storage device when it is determined to not be the same.
A data deduplication device that eliminates duplication of storage target data and stores the storage target data in a storage device for storage, wherein the storage target data includes a data set including a plurality of data groups managed in time series, the data groups include one or more management data, and a hash value of a first data group among the data groups is stored in a second data group, among the data groups, having a predetermined relationship with the first data group, the data deduplication device, comprising:
A data deduplication method by a data deduplication device that eliminates duplication of storage target data and stores the storage target data in a storage device for storage, wherein the storage target data includes a data set including a plurality of data groups managed in time series, the data groups include one or more management data, and a hash value of a first data group among the data groups is stored in a second data group, among the data groups, having a predetermined relationship with the first data group, the data deduplication method, comprising:
A data deduplication program that is stored on a memory and executed by a computer constituting a data deduplication device that eliminates duplication of storage target data and stores the storage target data in a storage device for storage, wherein the storage target data includes a data set including a plurality of data groups managed in time series, the data groups include one or more management data and a hash value of a first data group among the data groups is stored in a second data group, among the data groups, having a predetermined relationship with the first data group, and
Dependencies are inferred from the claim text.