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The Study And Lmplementation Of Distributed Database Access Technology Based On JAVA/CORBA

Posted on:2002-03-21Degree:MasterType:Thesis
Country:ChinaCandidate:J W ZhuFull Text:PDF
GTID:2168360032953022Subject:Computer system architecture
Abstract/Summary:PDF Full Text Request
Along with the network technology and' database technology developed, distributeddatabase (DDB) access technology became one of the focuses. This paper studied andimplemented the DDB access technology based on JAVA/CORBA.Firstly, compared and improved the existing database access technology, put forward aDDB access model based on JAVA/CQRBA, implemented database query system of theJiangMen Information Center. Using this access model resolved the flexibility issue, adoptedthe JAVAICQRBA technology to achieve the communication between client and server, andincreased the system expansibility and efficiency.The system run speed is an important problem in the process of system exploitation,especially deal with statistic calculation and data query in large scale. Therefore, we researchon the query optimal algorithm of DDB system and bring forward an Iterative DynamicProgramming (IDP). Compared IDP performance with other query optimal algorithm, thepaper shown that IDP can produce optimal query plan at reasonable cost.
Keywords/Search Tags:JAVA, CORBA, distributed database, query optimal algorithm
PDF Full Text Request
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