Title:
データベースの管理方法、データベース管理システム、およびプログラム
Document Type and Number:
Japanese Patent JP5283769
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a multimaster node type database management method capable of efficiently utilizing resources by achieving transaction discarding processing at a larger minimum value level without disturbing the consistency of the entire database.SOLUTION: An active transaction minimum value in a snap shot is notified from a lower-order master node to much higher-order master nodes, and the respective master nodes compare the transaction minimum value with a minimum value held by them to update a node minimum value and a cluster minimum value. The lower-order master node transmits a shadow copy of its own database, a heap tuple map expanded on its own memory and a transaction minimum value as a writing set, and a higher-order master node receiving the writing set updates a database by using the writing set when the transaction minimum value is equal to or larger than the cluster minimum value, and aborts the writing set when the transaction minimum value is smaller than the cluster minimum value.
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Inventors:
Hiroyuki Yamada
Application Number:
JP2012013839A
Publication Date:
September 04, 2013
Filing Date:
January 26, 2012
Export Citation:
Assignee:
Murakumo inc.
International Classes:
G06F12/00
Domestic Patent References:
| JP10171688A | ||||
| JP6215032A | ||||
| JP8055048A | ||||
| JP2010218159A |
Foreign References:
| WO2010106991A1 | ||||
| WO2012056734A1 |
Other References:
石井 達夫,実践テクニックをご紹介 徒然PostgreSQL散策,WEB+DB PRESS,日本,(株)技術評論社,2004年 5月26日,第20巻,p. 224~232
Attorney, Agent or Firm:
Yoshiyuki Kawaguchi
Takato Hatazoe
Takato Hatazoe