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数据仓库联机维护中一致性问题的研究
引用本文:李子木,孙利民,周兴铭.数据仓库联机维护中一致性问题的研究[J].软件学报,1999,10(8):812-818.
作者姓名:李子木  孙利民  周兴铭
作者单位:长沙工学院计算机科学系,长沙,410073;长沙工学院计算机科学系,长沙,410073;长沙工学院计算机科学系,长沙,410073
摘    要:数据仓库是存储供查询和决策分析用的集成化信息仓库,它的信息来源于不同地点的数据库或其他信息源.实体化视图是数据仓库中存储的主要信息实体,当原始数据发生变化时,数据仓库中的实体化视图也必须作相应的更新维护.在数据仓库实体化视图的联机维护过程中,由于联机分析处理(On-line Analytical Process,简称OLAP)查询的介入,会产生数据不一致的问题.文章提出了一种MVCA(multiversion compensating algorithm)算法来解决这一问题.MVCA采用版本控制方法,利用补偿思想和应答机制协调数据库和数据仓库之间的更新维护操作,达到保证数据一致的目的.最后,文章通过一个典型示例说明了该算法在实际中的具体应用.

关 键 词:数据仓库  实体化视图  联机维护  数据一致性  MVCA(multiversion  compensating  algorithm).
收稿时间:5/5/1998 12:00:00 AM
修稿时间:9/1/1998 12:00:00 AM

Consistency Algorithm for Data Warehouse On-line Maintenance
LI Zi-mu,SUN Li-min and ZHOU Xing-ming.Consistency Algorithm for Data Warehouse On-line Maintenance[J].Journal of Software,1999,10(8):812-818.
Authors:LI Zi-mu  SUN Li-min and ZHOU Xing-ming
Affiliation:Department of Computer Science Changsha Institute of Technology Changsha. 410073
Abstract:A warehouse is a data repository containing integrated information for efficient querying and analysis, which data come from the databases or the other info-sources at different places. Materialized view is the primary information entity stored in the data warehouse. It must be refreshed when the corresponding data changed in the database. Consistency problem will be arisen during materialized views on-line maintenance because of the invention of OLAP query. In this paper, the authors introduce a new algorithm, MVCA (multiversion compensating algorithm), using multiversion and compensating techniques, along with acknowledgement mechanism to synchronize the maintenance process between the database and the data warehouse so as to ensure the data consistency. At the end of the paper, the authors illustrate the application of the algorithm by a typical example.
Keywords:Data warehouse  materialized view  on-line maintenance  data consistency  MVCA(multiversion compensating algorithm)  
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