详细信息
文献类型:期刊文献
中文题名:P2P数据交换系统的非一致性数据管理
英文题名:Inconsistent Data Management in P2P Data Exchange System
作者:胡国玲[1];邵志清[1]
机构:[1]华东理工大学信息科学与工程学院,上海200237
年份:2007
卷号:33
期号:4
起止页码:520
中文期刊名:华东理工大学学报(自然科学版)
外文期刊名:Journal of East China University of Science and Technology
收录:CSTPCD;;EI(收录号:20073810818850);Scopus;北大核心:【北大核心2004】;CSCD:【CSCD2011_2012】;
语种:中文
中文关键词:P2P数据交换系统;一致性约束;查询处理;数据库
外文关键词:P2P data exchange system; integrity constraints; query processing; database
摘要:给出了P2P数据交换系统的形式模型,描述了对等体的本地数据一致性约束、对等体间的信任关系以及对等体间的数据交换约束。并在此基础上提出了基于"查询候选数据集"的全局一致性查询处理策略。一个对等体的"查询候选数据集"是满足其本地数据一致性约束和对等体间所有数据交换约束的全局数据库虚拟子视图。提交到一个对等体的查询操作通过在其查询候选集上进行便可以得到全局一致的查询结果。给出了"查询候选数据集"的构造算法。
In this paper, a formal model of P2P data exchange system was presented. It describes not only the local integrity constraints of a peer, but also trust relationships and data exchange constraints between peers. Based on the model, a query processing strategy based on "Query Candidate Data Set" was proposed. A "Query Candidate Data Set" is a virtual view of the global database. A global consistent query result can be obtained by executing the query based on peer's Query Candidate Data Set. A "Query Candidate Data Set" construction algorithm was also presented.
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