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Title:
DISTRIBUTED DATABASE SYSTEM AND METHOD FOR EXPANDING DISTRIBUTED DATABASE SYSTEM
Document Type and Number:
Japanese Patent JP3226891
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To provide a distributed database system capable of expanding a system without stopping.
SOLUTION: A key management database 31 stores a database name in which data corresponding to keys are stored, and time accessing a transition object database 11 and its key value are recorded in a log file 13. A key extracting means 100 extracts the key value of data shifted from the database 11 to an additional database 21. A saving means 101 reads the key value one by one and saves corresponding data in an intermediate database 12. A loading means 201 loads the data of an intermediate database 22 into the database 21. A key management database updating means 102 retrieves the file 13, eliminates data from the database 21 when the shifted data is updated during the above processing and adds the key to the end of a read object.


Inventors:
Shimizu, Akihiko
Application Number:
JP1999000049083
Publication Date:
November 05, 2001
Filing Date:
February 25, 1999
Export Citation:
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Assignee:
NEC SOFTWARE CHUGOKU LTD
International Classes:
G06F12/00; G06F17/30; (IPC1-7): G06F12/00; G06F17/30
Attorney, Agent or Firm:
高橋 詔男 (外3名)