Hitachi, Ltd.

Shusaku Miwa

Nobuyuki Saika

Homare Kanie

Takahiro Miwa

There is provided a storage system that can avoid an increase in inter-node communication in the cooperation between file service and block service. The storage system includes a management section that manages a file processing section of a node in a currently active system and a file processing section of a node in a standby system as a pair, sets the file processing section of the node in the currently active system to be operational, manages a block processing section of the node in the currently active system and a block processing section of the node in the standby system as a pair, and sets the block processing section of the node in the currently active system to be operational.

Multi-node storage system and cooperation method for performing input output

The information system of the present invention is composed of multiple sites including a local file server and clients, and a data center having a center file server. When a user starts moving to a different site after using a file in the local file server through a client of any one site, the local file server replicates files of a user having the shortest predicted arrival site to a different site to a center file server preferentially based on a location information of each user. Further, at each site, files of a user having a short predicted time of arrival to its own site are downloaded based on the location information of the user.

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Tokyo, Japan

Shusaku Miwa