Part 3 of this series focuses on the application layer as you move on to file systems, using various commands to monitor and tune your file systems and disk I/O subsystems.

本系列文章的第 3 部分将在您继续研究文件系统的同时，重点关注于应用程序层，并使用各种命令以监视和优化您的文件系统和磁盘 I/O 子系统。

youdao

For example, if you were instrumenting a file I/O function, you might add the name of the file being written to the probe for that function.

例如，如果要检查一个文件 I/O 函数，可以把正在写的文件的名称添加到函数的探测中。

youdao

The metadata server transforms the file name into an inode, file size, and striping data (layout) that the Ceph client uses for file I/O.

元数据服务器将文件名转变为索引节点，文件大小，和 Ceph 客户端用于文件 I/O 的分段数据（布局）。

youdao

stdio h This file here is called standard I/O or stdio.h and this is just another text file someone else wrote many years ago and by using that line of code there, I'm telling the computer, give me acces to this code that this other person wrote that's in that file.

在这里的头文件称为标准输入输出文件或,这是由某位前人编写的文本文件,我们只需要刚才所述的一行代码，就能告诉电脑，让我连接到,这个前人在那个文件中写的代码。

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