iotop监视linux磁盘使用情况

iotop能查看使用磁盘的进程以及IO

默认iotop命令是不安装的，但是在RHEL安装光盘中有。另外需要root权限执行

可以在挂载好本地yum后

yum install iotop

常用使用方法：

# iotop -oP

-o: 只显示当前有IO的进程或thread

-P：只显示进程

  --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)

IO速率还是以易读的形式显示的，可以说非常贴心了