linux 查看硬盘io工具 iotop 解析

源中自带此命令,直接安装

[t@bjb0541 ~]$ sudo dnf  install iotop -y
Last metadata expiration check performed 6:20:24 ago on Thu Feb 18 09:17:53 2016.
Dependencies resolved.
=====================================================================================================================================================
 Package                          Arch                              Version                                  Repository Size
=====================================================================================================================================================
Installing:
 iotop                            noarch                            0.6-6.fc23                               fedora                             57 k

Transaction Summary
=====================================================================================================================================================
Install  1 Package

Total download size: 57 k
Installed size: 156 k
Downloading Packages:
iotop-0.6-6.fc23.noarch.rpm                                                                                          899 kB/s | 57 kB     00:00
-----------------------------------------------------------------------------------------------------------------------------------------------------
Total                                                                                                                858 kB/s | 57 kB     00:00
Running transaction check
Transaction check succeeded.
Running transaction test
Transaction test succeeded.
Running transaction
  Installing : iotop-0.6-6.fc23.noarch                                                                                                          1/1
  Verifying : iotop-0.6-6.fc23.noarch                                                                                                          1/1

Installed:
  iotop.noarch 0.6-6.fc23

iotop是管理命令,普通用户没有权限运行.

[t@bjb0541 ~]$ sudo iotop  --help
Usage: /sbin/iotop [OPTIONS]

DISK READ and DISK WRITE are the block I/O bandwidth used during the sampling
period. SWAPIN and IO are the percentages of time the thread spent respectively
while swapping in and waiting on I/O more generally. PRIO is the I/O priority at
which the thread is running (set using the ionice command).

Controls: left and right arrows to change the sorting column, r to invert the
sorting order, o to toggle the --only option, p to toggle the --processes
option, a to toggle the --accumulated option, i to change I/O priority, q to
quit, any other key to force a refresh.

Options:
--version             show program's version number and exit
-h, --help            show this help message and exit
-o, --only            only show processes or threads actually doing I/O
-b, --batch           non-interactive mode
-n NUM, --iter=NUM    number of iterations before ending [infinite]
-d SEC, --delay=SEC   delay between iterations [1 second]
-p PID, --pid=PID     processes/threads to monitor [all]
-u USER, --user=USER  users to monitor [all]
-P, --processes       only show processes, not all threads
-a, --accumulated     show accumulated I/O instead of bandwidth
-k, --kilobytes       use kilobytes instead of a human friendly unit
-t, --time            add a timestamp on each line (implies --batch)
-q, --quiet           suppress some lines of header (implies --batch)

iotop键盘操作方式:
<-,-> :  左右键切换排序列
r        :  反向排序当前列,在列名后面有一个方向箭头指示,<由小到大,>由大到小
o       :  切换只显示有i/o活动的进行,等同 --only选项
p       :  切换只显示进程,不显示多线程,等同--processes选项
a       :  切换显示累加值,而不是带宽值,等同--accumulated选项
i        :  改变I/O优先级
q       :  退出 
其它任何键:  刷新
运行

[t@bjb0541 ~]$ sudo iotop

界面展示: