Inspecting disk IO performance with fio

Install fio

yum install fio

Create fio random read job

Create job file ‘random-read-test.fio’ with the following contents:

[random-read]
rw=randread
size=128m
directory=/tmp/fio-testing/data

Create fio random write job

Create job file ‘random-write-test.fio’ with the following contents:

[random_rw]
rw=randrw
size=128m
directory=/tmp/fio-testing/data

run fio

fio random-write-test.fio