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专利名称：Database system, server, query posing
method, and data updating method
发明人：Yoshio Suzuki,Shinji Fujiwara申请号：US10751419申请日：20040106
公开号：US20040186829A1公开日：20040923
专利附图：
摘要：An object of the present invention is to avoid contention for resources in aparallel/decentralized database system so as to improve the performance of the system.A query posing method is implemented in a database system comprising a plurality of
database servers each of which includes a database from which the same content can beretrieved and searches the database in response to a query request a front-end serverthat poses a query according to a predetermined rule and a management server thatmanages rules to be used by the front-end server. The management server acquires aprocessed query log relevant to a database server, and produces a rule according to thecompatibility value of a query calculated using the acquired processed query log.Moreover, the front-end server poses the query according to the rule produced by themanagement server.
申请人：HITACHI, LTD.
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