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Method and system for dynamically and asynchronously expanding a file in a on-line database system without suppression of job execution
Method and system for dynamically and asynchronously expanding a file in a on-line database system without suppression of job execution
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机译:在联机数据库系统中动态和异步扩展文件而不抑制作业执行的方法和系统
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摘要
A dynamic file expansion method and system for on-line database systems is provided. When an empty space of a file becomes insufficient, the file is dynamically expanded asynchronously with a record input/output process relative to an already existing space, by using another process while continuing the record input/output process. Jobs are not therefore intercepted and adversely affected by insufficient empty space of the file. In the structure of the method and system, a file expansion timing detecting section monitors the remaining empty space of a file with the help of a record input/output processing section. When the remaining empty space becomes equal to or less than a predetermined space registered in a file expansion information registering section, a dynamic file expansion is requested to an asynchronous file expanding section. The asynchronous file expanding section generates new space management information using a process different from the process executed by the record input/output processing section, to execute a space expanding process and an expanded space initializing process.
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