Rethink the sync

最新推荐文章于 2024-06-23 11:13:02 发布

最新推荐文章于 2024-06-23 11:13:02 发布 · 186 阅读

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研究人员提出了一种新的I/O模型——外部同步（e-sync），它结合了同步I/O的简单性和可靠性，同时性能接近异步I/O。通过两个文件系统的修改操作及对外部设备输出的例子展示了e-sync与传统同步I/O的区别。

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We know the traditional I/O models: sync and async, however, some researchers from Michigan University figures out a new model, they call it "external sync"

The difference between e-sync and sync is shown below:

This figure shows the behavior of a sample application that makes two file system modifications, then displays output to an external device. The diagram on the left shows how the application executes when its file I/O is synchronous; the diagram on the right shows how it executes when its file I/O is externally synchronous.

External synchrony preserves the simplicity and reliability of a synchronous I/O interface, yet performs approximately as well as an asynchronous I/O interface.