| The article has carried on the elaboration to the distributional database system's basic concept, it including definition and this system's pattern, architecture, in distributional database data lamination as well as distribution; Then simply processed the general process which to the distributional inquiry and optimized to carry on the elaboration; Then the article to the optimized method which used frequently has done the key research.The article is mainly to the distributional inquiry optimization strategy key research. The article optimized goal is by corresponds the transmission expenses primarily, utilized half joint to operate this algorithm, the SDD1 algorithm has made the massive deliberations in the distributional database inquiry utilization, and explored a new algorithm. Is based on relates half joint the optimized algorithm, this algorithm proved through the experiment, very big has omitted the middle link's work load, reduced its total price greatly for the network service. |
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