Research And Application Of Web-OLAP System Based On Distributed Data Cache Technique

With the rapid development of the economic globalization process, there are more and more group enterprises. In daily business management process, these group enterprises need to integrate the information from its member enterprises to make unified decision. The member enterprises located in different geographical areas can manage it independently; they also need to make daily management decision. The traditional centralized decision support systems for single data ware, can't meet the needs of group enterprises.In order to satisfy the needs of group enterprises decision, a framework of the Web-OLAP system based on distributed environment is proposed in this thesis. Firstly, the shortcomings of centralized Web-OLAP system are investigated, as well as the problems of Web-OLAP system based on distributed environment are addressed. In order to improve the system performance, distributed cache technology is introduced into the Web-OLAP system, and then the framework of the Web-OLAP system based on distributed data cache technique is given out; and every part of this framework is described in detail. Thereafter, two key technologies—the construct and fresh technology of data cache are deeply analyzed, the architecture of the distributed data cache is analyzed; the description of the member enterprise and the headquarters of the group enterprise is given out; a maintenance algorithm of the distributed data cache is designed. Based on the analysis of a fresh algorithm of the distributed data cache, two improved data cache fresh algorithm for the member enterprises and headquarters of the group enterprise are designed respectively.At last, the research results above are applied to the decision support sub-system of the extended manufacturing integrated quality management system, and then achieve better effect.