Database system having a plurality of nodes communicating with e

Details Database system having a plurality of nodes communicating with e Database system having a plurality of nodes communicating with e

1994-04-28

1995-10-31

Horabik, Michael

Communications: electrical

Continuously variable indicating

With meter reading

34082505, 395600, 39549705, 39520008, G06F 1314

Patent

active

054633818

ABSTRACT:
A database system includes a communication network, and a plurality of nodes. Each node includes a data storage device, a management part managing a status of the data stored in the data storage device, and a data storage request part for generating an alternative data storage device assignment request for requesting at least one of other nodes among the plurality of nodes to store data in the data storage device of the other node via the communication network when a predetermined condition is satisfied. A determining part receives the alternative data storage device assignment request from a request node which generates the alternative data storage device assignment request and assigns a storage area in the data storage device for storing data related to the alternative data storage device assignment request by referring to the status of the data managed by the management part when the data storage device of the other node has an enough storage capacity to store the data related to the alternative data storage device assignment request.

REFERENCES:
patent: 4716408 (1987-12-01), O'Conner et al.
patent: 4881164 (1989-11-01), Hailsern et al.
Motzkin et al., "The design of distributed databases with cost optimization and integration of space constraints," AFIPS Conference Proceedings 1987 National Computer Conference, vol. 56, Jun. 18, 1987, Chicago, Ill., pp. 563-572.
Demers, "Distributed files for SAA," IBM Systems Journal, vol. 27, No. 3, Sep. 1988, Armonk, N.Y., pp. 348-361.

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