Linux - How to perform I/O performance test with dd command

Linux - How to perform I/O performance test with dd command

 
Question : How to perform I/O performance test in Linux to find r/w speed?
Answer :  It can be achieved using dd command.

Example to test write speed :
1. Go to the directory location where you want to perform the test.
[root@server ~]# cd /dir

2. Run dd command below.
[root@server ~]# dd if=/dev/zero of=dd.data bs=4k count=200000 conv=fsync
200000+0 records in
200000+0 records out
819200000 bytes (819 MB) copied, 8.47374 seconds, 96.7 MB/s

[root@server ~]# ls -la
total 801588
drwxr-xr-x 2 root     root          4096 Oct 22 12:51 .
drwxr-x--- 5 root     root           8192 Oct 22 12:51 ..
-rw-r--r-- 1 root     root     819200000 Oct 22 12:51 dd.data


Example to test read speed :
[root@server ~]# time time dd if=/path/to/bigfile of=/dev/null bs=8k

                              if = name of input file
                             of = name of output file
                             bs = size of block
                        count = number of block
                         conv = fsync - flush data at the end of the copy
                                   dsync - flush data after every block of the copy
0 (0)
Article Rating (No Votes)
Rate this article
Attachments
There are no attachments for this article.
Comments
There are no comments for this article. Be the first to post a comment.
Full Name
Email Address
Security Code Security Code
Related Articles RSS Feed
Check a Website Availability from the Linux Command Line
Viewed 5376 times since Mon, Feb 18, 2019
YUM CRON RHEL7: Configure automatic updates.
Viewed 1131 times since Fri, Oct 26, 2018
Secure Secure Shell
Viewed 8967 times since Fri, Aug 21, 2020
How To Use the Linux Auditing System on CentOS 7
Viewed 2759 times since Fri, Apr 5, 2019
Improve security with polyinstantiation
Viewed 11549 times since Fri, May 15, 2020
IPTABLES linux
Viewed 16133 times since Sat, Jun 2, 2018
LVM: Create a new Volume Group
Viewed 1279 times since Sat, Jun 2, 2018
A Simple Guide to Oracle Cluster File System (OCFS2) using iSCSI on Oracle Cloud Infrastructure
Viewed 6439 times since Sat, Jun 2, 2018
RHEL: Getting/Setting hardware clock’s time
Viewed 2005 times since Sat, Jun 2, 2018
LVM: Rename root VG/LV
Viewed 6293 times since Sat, Jun 2, 2018