Linux IO调度-阿里云

简述Linux IO调度的算法

IO调度算法经常是文件系统优化的一个重要内容。 noop（不干涉算法） noop算法，假设硬盘IO能力是足够的，有一定的IO合并优化，大致按照先来后到的顺序分配IO，适用于SSD，传统硬盘因为存在寻址，在noop算法下，性能会非常差。 cfq （完全公平算法） cfq算法，给每个进程一个IO队列，然...

Linux的IO调度

Linux的IO调度 IO调度发生在Linux内核的IO调度层。这个层次是针对Linux的整体IO层次体系来说的。从read()或者write()系统调用的角度来说，Linux整体IO体系可以分为七层，它们分别是： VFS层：虚拟文件系统层。由于内核要跟多种文件系统打交道，...

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更新时间 2022-07-27 12:22:21

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