Iometer is both a workload generator (it performs I/O operations in order to stress the system) and a measurement tool (it examines and records the performance of its I/O operations and their impact on the system). It can be configured to emulate the disk or network I/O load of any program or benchmark, or can be used to generate entirely synthetic I/O loads. It can generate and measure loads on single or multiple (networked) systems.
The tool consists of two programs, Iometer and Dynamo.
For testing the performance on Windows systems, Iometer can be installed and started directly.
An additional installation of Dynamo is not necessary. Below you find instructions for installing the tool and for starting the test procedure.
First, you have to download Iometer from Iometer.org.
Agree to the license conditions
Figure 2.1: License conditions
Click on the folder button
Figure 2.2: Folder button in the upper left corner
Download the test configuration file SIM-Real-World-Workload-2.1.0.icf, and open it with Iometer .
Figure 2.3: Choose configuration file
Choose the device to be tested
Figure 2.4: Choose the device to be tested
Start the test by clicking on the green flag button
Figure 2.5: Green flag button in the upper middle
Define the destination where to save the results file
Figure 2.6: Choose destination for results
Now the test starts and will run for about 10-15 minutes
Figure 2.7: Running test
The program Iometer only runs on Windows OS. So on Linux systems the tool Dynamo is used for sending the relevant information to a Windows system, where Iometer is installed.
This means an installation of Iometer on a Windows system or Windows emulator is necessary for testing a system with Linux installed. Download Iometer from Iometer.org.
First Install Iometer on a windows system in the same network as the server you want to test.
If there is no Windows client available to run the Iometer .exe, it can be run with WinE emulator as well.
Figure 3.1: Iometer GUI
Connect via SSH to Linux server (e.g. via Putty)
Figure 3.2: Putty
Figure 3.3: Click Yes
Login into the server
Figure 3.4: Console via Putty
uname -i to receive information about the hardware platform, which is necessary to choose the right version of Dynamo.
Figure 3.5: Check hardware version
rpm -qa|grep -i glibc you check the installed version of glibc
Figure 3.6: Command output
Switch to the
Figure 3.7: /tmp folder
Uncompress the downloaded Iometer file with
tar xvf Iometer -1.1.0-linux.x86_64-bin.tar.bz2
Figure 3.8: Uncompress the dynamo file
Check the IP address of the Windows system by using the CLI command
Figure 4.1: Check IP of Windows system
Check the IP addresses of the Linux system with
ip addr show or
Figure 4.2: Check IP of Linux system
Stop the Linux firewall to allow communication between Dynamo and Iometer
service iptables stopor
systemctl stop firewalld
service iptables stop
Figure 4.3: Stop firewall on Linux system
vi /etc/hosts to make changes to the host file for the name resolving
Figure 4.4: Open /etc/hosts
Add the IP address and the name of the Linux system
Figure 4.5: Add IP and name
Now connect dynamo with Iometer by using the command:
dynamo -i <IP of machine with Iometer = windows system> -m <IP of machine to run workload = linux system>
Figure 4.6: Connect dynamo to Iometer
Figure 4.7: Connection established
In Iometer now the Linux server is visible
Figure 4.8: Linux system listed in Iometer
Before loading the test template Sim-Real-World-Workload-2.1.0.icf, some changes must be done on the file.
Open the file in an editor (e.g. Notepad). Change the Manager name and Manager network address by using the information you used in step 5. Save the file when changes are done.
Figure 4.9: Search MANAGER LIST
Figure 4.10: Add Linux server name
Figure 4.11: Add Linux server IP address and save file
Load the changed template
Figure 4.12: Load configuration file
Choose the device to be tested
Figure 4.13: Choose the device to be tested
Start the test by clicking the green flag button
Figure 4.14: Green flag in the upper middle
Choose the destination where the results shall be saved after testing.
Figure 4.15: Choose destination for results
Now the test starts
Figure 4.16: Running test
When the test is done..
Figure 4.17: Finished test in the console view
…do not forget to re-activate the firewall, delete the information from /etc/host (undo step 5) and
Figure 4.18: Exit console
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Article ID: HOW10228
Last Date Modified: 03/06/2018 09:09 AM
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