Nec Corporation

Yasuo Itabashi

Yoshiaki Sakae

Masaki Kan

Dai Kobayashi

Masumi Ichien

Takashi Torii

Kinichi Sugimoto

Toshiya Okabe

Michitaro Miyata

Takayuki Shizuno

To increase the reliability of power supply control of a server group and reduce the power consumption of the server group. A server includes a power supply stop control unit which stops a power supply of a predetermined processing unit upon receiving a power supply stop instruction signal instructing to stop the power supply, a power supply start-up control unit which intermittently starts up the power supply of the predetermined processing unit when the power supply stop control unit stops the power supply of the predetermined processing unit, a power supply start-up determination unit which determines whether a processing load of other servers which are executing their processes among a plurality of other servers is higher than an upper limit load determined in advance as a load required to be processed by servers the number of which is greater than or equal to the number of the other servers which are executing their processes when the power supply start-up control unit starts up the power supply of the predetermined processing unit, and a process control unit which controls process execution for the predetermined processing unit when the processing load of the other servers which are executing their processes is determined to be higher than the upper limit load.

Server, power management system, power management method, and program

A distributed object management system includes: a completion information management portion which stores a relay state of the object server and which manages information of the object which should be transmitted again when the transmission to the object server is resumed; and a relay control portion which requests other object server to temporally exclude the object server that has transmitted the suspension request from a copying operation of the object and which, if the resume request is received from the object server that has transmitted the suspension request, requests said other object server to include the object server that has transmitted the resume request in the copying operation of the object again.

Distributed object management system, distributed object management server, distributed object management method and computer program of the same

Access destination determination means determines a read destination and/or a write destination of specified data from nodes corresponding to the data and stored in data store destination storage means. Access probability calculation means calculates an access probability based on a history of accesses to the data, and stores the calculated access probability in access probability storage means. When no node corresponding to the specified data is stored in the data store destination storage means, access probability estimation means estimates an access probability of the data based on access probabilities stored in the access probability storage means, and the access destination determination means determines a write destination of the data based on the estimated access probability.

Data access location selecting system, method, and program

Provided is a data supply apparatus including a transmission device that sends data to another data supply apparatus; a reception device that receives data from another data supply apparatus; a data storing device that stores data in a storage device; and a data storage determination device that determines whether or not the received data should be stored in the storage device, based on a predetermined supply probability. In a typical example, the reception device receives the data to which supply probability information which indicates the supply probability has been appended; and the data storage determination device determines whether or not the received data should be stored in the storage device, based on the supply probability indicated by the supply probability information.

Data supply apparatus, system, and method for supplying data to hierarchically-connected data supply destinations

A system includes a processing history recording means that records history information of information processing performed by an information processing means on data, a plurality of information storing means that store information in mutually different information storage formats, and an information storage format control means that controls to changes an information storage format of data, on the basis of a history of information processing performed on the data.

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Tokyo, Japan

Yasuo Itabashi