Disk I/O performance test and Fault Diagnosis

Test Io Write Performance in the actual environment

First, you must monitor disk I/O in real time.

> Sar-D interval count

At the same time, write Io pressure on the disk

> TIME dd If =/dev/Zero of = Baa. img bs = 1024000 COUNT = 1002

Test Io read performance

> TIME dd If =/dev/Zero of = Baa. img bs = 1024000 COUNT = 1002

Sometimes, if the physical volume is faulty, we need to know the location of the physical volume where the file is located.

Run the following command:

Dd If = File Name of =/dev/null BS = 1024000

Read files and use Io monitoring commands to monitor which disk I/O is upgraded