fio FOR LINUX

fio is an I/O tool meant to be used both for benchmark and stress/hardware verification. It's a handy tool that you can use to check how well your system performs!

Features of fio

What's cool about fio is that it supports four different types of I/O engines: sync, mmap, libaio, and posixaio. Plus, you can set up rate I/O, manage I/O priorities, and create either forked or threaded jobs. There's so much you can do with it!

Basic Commands in fio

• -s: This sets the I/O as sequential.


• -b: This option allows you to specify the block size in KiB for each I/O operation.


• -t : This sets the runtime in seconds.


• -r: For random I/O, this makes sure the sequence is repeatable.


• -R : If one thread doesn't meet the rate, this will quit all threads.


• -o : Use direct I/O if set to 1; buffered if it's 0.


• -l: Generate logs for latency per job.


• -w: Generate logs for bandwidth per job.


• -f : Read from a specified file for job descriptions.

Sample Job File Example

        [read_file]

        rw=0

        bs=4096



        [write_file]

        rw=1

        bs=16384

    

You would then run fio as follows:

fio -o1 -s -f file_with_above

If you're setting up multiple jobs, your second example could look something like this:

        [rf1]

        rw=0

        prio=6



        [rf2]

        rw=0

        prio=3



        [rf3]

        rw=0

        prio=0

        direct=1

    

You'd invoke it like so:

fio -o0 -s -b4096 -f file_with_above

If you want to learn more or download fio, check out Softpas! They have tons of software options available!