Tutorials:
JMETER TUTORIAL:
Before
digging into the JMeter, let us first understand few jargons mostly associated
with the testing of any application.
- Performance Test: This
test sets the ‘best possible’ performance expectation under a given
configuration of infrastructure. It also highlights early in the testing
process if changes need to be made before application goes into
production.
- Load Test: This
test is basically used for exercising\discovering the system under the top
load it was designed to operate under.
- Stress Test: This
test is an attempt to break the system by overwhelming its resources.
What is JMeter?
JMeter is a
software allowing to load test or performance oriented business (functional)
test on different protocols or technologies. Stefano Mazzocchi of the Apache Software Foundation was the
original developer of JMeter. He wrote it primarily to test the performance of
Apache JServ (Now called as Apache Tomcat project). Apache later redesigned
JMeter to enhance the GUI and to add functional-testing capabilities.
This is a
Java desktop application with a graphical interface using the Swing graphical
API, can therefore run on any environment / workstation accepting a Java
virtual machine, for example: Windows, Linux, Mac, etc.
The
protocols supported by JMeter are:
- Web: HTTP, HTTPS sites 'web 1.0' web 2.0 (ajax, flex and
flex-ws-amf)
- Web Services: SOAP / XML-RPC
- Database via JDBC drivers
- Directory: LDAP
- Messaging Oriented service via JMS
- Service: POP3, IMAP, SMTP
- FTP Service
JMeter Features
Following
are some of the features of JMeter:
- Its free. Its an open source software.
- It has simple and intuitive GUI.
- JMeter can load and performance test many different server types:
Web - HTTP, HTTPS, SOAP, Database via JDBC, LDAP, JMS, Mail - POP3
- It is platform-independent tool. On Linux/Unix, JMeter can be
invoked by clicking on JMeter shell script. On Windows it can be invoked
by starting the jmeter.bat file.
- It has full Swing and lightweight component support (precompiled
JAR uses packages javax.swing.* ).
- JMeter store its test plans in XML format. This means you can
generate a test plan using a text editor.
- It's full multi-threading framework allows concurrent sampling by
many threads and simultaneous sampling of different functions by separate
thread groups.
- It is highly Extensible.
- Can also be used to perform automated and functional testing of
your application.
How JMeter Works?
JMeter
simulates a group of users sending requests to a target server, and return
statistics that show the performance/functionality of the target server /
application via tables, graphs etc. The figure below depicts this process:
Environment
Set-Up
JMeter is a
framework for Java, so the very first requirement is to have JDK installed in
your machine.
System Requirement
|
JDK
|
1.6 or above.
|
|
Memory
|
no minimum requirement.
|
|
Disk Space
|
no minimum requirement.
|
|
Operating System
|
no minimum requirement.
|
Step 1 - verify Java installation in your machine
Now, open
console and execute the following java
command.
|
OS
|
Task
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Command
|
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Windows
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Open Command Console
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c:\> java -version
|
|
Linux
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Open Command Terminal
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$ java -version
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Mac
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Open Terminal
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machine:~ joseph$ java -version
|
Let's verify
the output for all the operating systems:
|
OS
|
Output
|
|
Windows
|
java version "1.7.0_25"
Java(TM) SE Runtime Environment (build 1.7.0_25-b15) Java HotSpot(TM) 64-Bit Server VM (build 23.25-b01, mixed mode) |
|
Linux
|
java version "1.7.0_25"
Java(TM) SE Runtime Environment (build 1.7.0_25-b15) Java HotSpot(TM) 64-Bit Server VM (build 23.25-b01, mixed mode) |
|
Mac
|
java version "1.7.0_25"
Java(TM) SE Runtime Environment (build 1.7.0_25-b15) Java HotSpot(TM) 64-Bit Server VM (build 23.25-b01, mixed mode) |
If you do
not have Java installed, install the Java Software Development Kit (SDK) from http://www.oracle.com/technetwork/java/javase/downloads/index.html.
We are assuming Java 1.7.0_25 as installed version for this tutorial.
Step 2: Set JAVA environment
Set the JAVA_HOME environment variable to
point to the base directory location, where Java is installed on your machine.
For example;
|
OS
|
Output
|
|
Windows
|
Set the environment variable JAVA_HOME to
C:\Program Files\Java\jdk1.7.0_25
|
|
Linux
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export JAVA_HOME=/usr/local/java-current
|
|
Mac
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export JAVA_HOME=/Library/Java/Home
|
Append Java
compiler location to System Path.
|
OS
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Output
|
|
Windows
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Append the string; C:\Program
Files\Java\jdk1.7.0_25\bin to the end of the system variable, Path.
|
|
Linux
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export PATH=$PATH:$JAVA_HOME/bin/
|
|
Mac
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not required
|
Verify Java
Installation using java -version
command explained above.
Step 3: Download JMeter
Download
latest version of JMeter from http://jmeter.apache.org/download_jmeter.cgi. At the time of
writing this tutorial, I downloaded apache-jmeter-2.9 and copied it into
C:\>JMeter folder.
The
directory structure should look like as below:
- apache-jmeter-2.9
- apache-jmeter-2.9\bin
- apache-jmeter-2.9\docs
- apache-jmeter-2.9\extras
- apache-jmeter-2.9\lib\
- apache-jmeter-2.9\lib\ext
- apache-jmeter-2.9\lib\junit
- apache-jmeter-2.9\printable_docs
You can
rename the parent directory (i.e. apache-jmeter-2.9) if you want, but do not
change any of the sub-directory names.
Step 4: Run JMeter
Once the you
download the JMeter, goto to the bin directory. In our case it would be /home/manisha/apache-jmeter-2.9/bin.
Now click on the following:
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OS
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Output
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Windows
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jmeter.bat
|
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Linux
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jmeter.sh
|
|
Mac
|
jmeter.sh
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Once clicked
on the above file, after a short pause, the JMeter GUI should appear which is a
Swing application as seen in the image below:
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