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Database management program database management server, database management systems, and database management method
Database management program database management server, database management systems, and database management method
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机译:数据库管理程序数据库管理服务器,数据库管理系统和数据库管理方法
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摘要
Provided is a database management server apparatus that can maintain the consistency of updates and prevent blocking other update requests in an update process. A server apparatus 3 of a database management system 1 has a function of nondestructively updating databases in response to an update request from a client apparatus 2 to manage generation-management databases. A main storage unit 4 stores entities of a plurality of databases for each version of the databases, and a version creating unit 5 creates a new version of the databases in response to an update request from a client apparatus. A request accepting unit 11 accepts an update request for a next version regardless of whether the new version is being created. An acceptance management unit 13 starts a period for accepting the update request for the next version in response to the update request and ends the period for accepting after a predetermined time. A version creating unit 5 creates the next version based on the update request accepted in the period for accepting.
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