FILESYSTEMIO_OPTIONS Initialization Parameter

最新推荐文章于 2019-09-21 17:46:41 发布

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最新推荐文章于 2019-09-21 17:46:41 发布

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文章标签： initialization asynchronous system documentation file

本文详细介绍了如何使用FILESYSTEMIO_OPTIONS初始化参数在文件系统文件中启用或禁用异步I/O和直接I/O。提供了多种配置选项，包括启用异步I/O、启用直接I/O、同时启用两者及禁用所有选项。

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You can use the FILESYSTEMIO_OPTIONS initialization parameter to enable or
disable asynchronous I/O or direct I/O on file system files. This parameter is
platform-specific and has a default value that is best for a particular platform. It can be
dynamically changed to update the default setting.
FILESYTEMIO_OPTIONS can be set to one of the following values:
■ ASYNCH: enable asynchronous I/O on file system files, which has no timing
requirement for transmission.
■ DIRECTIO: enable direct I/O on file system files, which bypasses the buffer
cache.
■ SETALL: enable both asynchronous and direct I/O on file system files.
■ NONE: disable both asynchronous and direct I/O on file system files.

See Also: Your platform-specific documentation for more details