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Title:
データベース管理方法及びデータベースシステム
Document Type and Number:
Japanese Patent JP4574230
Kind Code:
B2
Abstract:
If relocation of a table with a high reference frequency is made possible, the database management method and system are arranged to improve performance according to the number of increased nodes and accumulate a reference frequency of each external storage unit allocated to each database management node. A data storage area for storing the table with a high reference frequency, located in the external storage unit, is specified as a shared data area to be referenced by plural nodes. The system is controlled to cause the nodes to refer to the shared table stored in the shared data area on any timing in parallel. This prevents load from being concentrated onto the node allocated to the data area.

Inventors:
Yasuhiro Kamada
Nobuo Kawamura
Junko Katsumata
Kota Yamaguchi
Keisuke Toda
Application Number:
JP2004157619A
Publication Date:
November 04, 2010
Filing Date:
May 27, 2004
Export Citation:
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Assignee:
株式会社日立製作所
日立ソフトウエアエンジニアリング株式会社
International Classes:
G06F12/08; G06F15/00; G06F7/00; G06F12/00; G06F15/177; G06F17/30
Domestic Patent References:
JP2000020385A
Foreign References:
Attorney, Agent or Firm:
Ichiro Suzuki