"Iotop" that can be used for Linux file I / O tuning

File I / OI understand somehow that it is a performance bottleneck, but when you want to know what is concrete, usuallyVmstatYaIostatAlthough using "Iotop" is used, so-calledTop commandBecause it displays with a feeling like it, it becomes very easy to grasp the situation considerably depending on the case, which is very useful.

Details are below.
Iotop's homepage
http://guichaz.free.fr/iotop/

The contents are written in Python, and it works with Python 2.5 or higher and Linux kernel 2.6.20 or higher.

The screen looks something like this


Also, refer to the following pages for disk I / O related information.

Linux I / O story write compilation - naoya's Hatena diary

Linux Tuning Part 2 The 3rd Tuning Hard Disk (Part 1): ITpro