Nec Corporation

Michal Kaczmarczyk

Cezary Dubnicki

Marcin Barczynski

Wojciech Kilian

A storage device has: a data storage part storing deduplicated block data; a temporary data storage part temporarily storing block data acquired from the data storage part; a data retrieval control part retrieving the block data stored by the data storage part, storing the block data into the temporary data storage part, and retrieving the block data from the temporary data storage part; and a temporary data control part controlling the storage state of the block data stored by the temporary data storage part. The storage device also has a retrieval turn information storage part storing retrieval turn information which is information about a turn to be retrieved of the block data. The data retrieval control part causes the temporary data storage part to store the block data acquired from the data storage part on the basis of the retrieval turn information acquired from the retrieval turn information storage part, and the temporary data control part controls the storage state of the block data in the temporary data storage part on the basis of the retrieval turn information.

Storage device, program, and information processing method

A storage system according to the present invention includes: a block detecting means for checking whether respective block data obtained by division are already stored in a storage device; and a data writing means for storing the respective block data obtained by division with duplicated storage eliminated into the storage device. The block detecting means detects a share rate representing a rate of a shared portion between a plurality of consecutive block data configuring a predetermined range in write target data among the block data obtained by division and a plurality of block data in a predetermined range already stored consecutively in the storage device. The data writing means, depending on the detected share rate, newly stores the block data obtained by division, into the storage device.

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Warsaw, Poland

Michal Kaczmarczyk