Hitachi, Ltd.

Nec Corporation

Ryo Hanafusa

Tomohiro Yoshihara

Hiroki Fujii

Ryosuke Tatsumi

Masafumi Oyamada

Masahiro Tsuruya

Osamu Kawaguchi

A storage system comprises nodes and drives, and includes at least one mounting area to install the drives. A node manages a parity group constituted of the plurality of drives; generates, in a case where a target drive that is installed in a first mounting area and that belongs to a first parity group is to be moved from the first mounting area to a second mounting area, difference information regarding a storage area where data was written into the target drive during a period in which the target drive is moved from the first mounting area to the second mounting area; and restore data written into the storage area by using data stored in other drives than the target drive that belongs to the first parity group based on the difference information, and write the data into the target drive that has been moved to the second mounting area.

Storage system, method for moving drives, and non-transitory computer-readable medium

A subgraph extraction meansextracts, from a document structure graph indicating a document structure, a subgraph as a part of the document structure graph on the basis of inter-word relationship information indicating a relationship between a word and a word. A rule creation meanscreates a rule for extracting a subgraph having the same structure as the subgraph from the document structure graph. A knowledge addition meansextracts a subgraph from the document structure graph in accordance with the rule and adds the information indicated by the subgraph to the inter-word relationship information.

Knowledge expansion system, method, and program

It is possible to prevent unoccupied blocks from being depleted by a write of logical-physical management information. A processor is capable of performing an unoccupied user block generation process by moving user data stored in allocated user blocks in order to generate unoccupied user blocks serving as unoccupied blocks among allocated user blocks, and performing an unoccupied meta block generation process by moving meta data stored in allocated meta blocks in order to generate unoccupied meta blocks serving as unoccupied blocks among the allocated meta blocks. The processor calculates the number of unoccupied meta blocks to be consumed, that is, the number of unoccupied meta blocks to be consumed by the unoccupied user block generation process. The processor performs the unoccupied meta block generation process based on the number of unoccupied meta blocks to be consumed.

Storage device and storage device control method

In order to reduce the load of an approval process when approval is required to execute computation jobs using computer resources, the job execution system according to the present invention groups multiple computation jobs and then requests approval in units of groups, and when approval with respect to a group is obtained, all of the computation jobs included in that group are treated as having obtained approval.

Growing community of inventors

Tokyo, Japan

Ryo Hanafusa