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| <div class="section"> |
| <h1 id="distributed-testing">25. Apache JMeter Distributed Testing Step-by-step<a class="sectionlink" href="#distributed-testing" title="Link to here">¶</a> |
| </h1> |
| |
| |
| <p> |
| This short tutorial explains how to use multiple systems to perform stress testing. Before we start, there are a couple of things to check. |
| </p> |
| |
| |
| <ul> |
| |
| <li>the firewalls on the systems are turned off or correct ports are opened.</li> |
| |
| <li>all the clients are on the same subnet.</li> |
| |
| <li>the server is in the same subnet, if <span class="code">192.x.x.x</span> or <span class="code">10.x.x.x</span> IP addresses are used. |
| If the server doesn't use <span class="code">192.xx</span> or <span class="code">10.xx</span> IP address, there shouldn't be any problems.</li> |
| |
| <li>Make sure JMeter can access the server.</li> |
| |
| <li>Make sure you use the same version of JMeter and Java on all the systems. Mixing versions will not work correctly.</li> |
| |
| <li>You have <a href="remote-test.html#setup_ssl">setup SSL for RMI</a> or disabled it.</li> |
| |
| </ul> |
| |
| |
| <p> |
| Once you've made sure the systems are ready, it's time to setup remote testing. The tutorial assumes you already |
| have JMeter installed on all the systems. The way JMeter works is one master controller initiates the test on multiple slave systems. |
| </p> |
| |
| |
| <div class="clear"></div> |
| <div class="note">In this tutorial we use GUI Mode just for demonstration. In real life you should use CLI mode (NON GUI) to start your load test</div> |
| <div class="clear"></div> |
| |
| |
| <figure> |
| <a href="../images/screenshots/distributed-jmeter.svg"><img src="../images/screenshots/distributed-jmeter.svg" width="610" height="462" alt="One master controls multiple slaves"></a> |
| <figcaption>One master controls multiple slaves</figcaption> |
| </figure> |
| |
| |
| <div class="subsection"> |
| <h2 id="terminology">25.1 Terminology<a class="sectionlink" href="#terminology" title="Link to here">¶</a> |
| </h2> |
| |
| |
| <p> |
| Before we dive into the step-by-step instructions, it's a good idea to define the terms and make sure the definition is clear. |
| </p> |
| |
| |
| <dl> |
| |
| <dt>Master</dt> |
| <dd>the system running JMeter GUI, which controls the test</dd> |
| |
| <dt>Slave</dt> |
| <dd>the system running <span class="code">jmeter-server</span>, which takes commands from |
| the GUI and send requests to the target system(s)</dd> |
| |
| <dt>Target</dt> |
| <dd>the webserver we plan to stress test</dd> |
| |
| </dl> |
| |
| |
| <figure> |
| <a href="../images/screenshots/distributed-names.svg"><img src="../images/screenshots/distributed-names.svg" width="602" height="360" alt="Categories of systems"></a> |
| <figcaption>Categories of systems</figcaption> |
| </figure> |
| |
| |
| </div> |
| |
| |
| <div class="subsection"> |
| <h2 id="step-by-step">25.2 Step-by-Step<a class="sectionlink" href="#step-by-step" title="Link to here">¶</a> |
| </h2> |
| |
| |
| <ol> |
| |
| <li>On the slave systems, go to <span class="code">jmeter/bin</span> directory and execute |
| <span class="code">jmeter-server.bat</span> (<span class="code">jmeter-server</span> on unix). |
| </li> |
| |
| <li>On master system acting as the console, open windows explorer and go to |
| <span class="code">jmeter/bin</span> directory</li> |
| |
| <li>Open <span class="code">jmeter.properties</span> in a text editor</li> |
| |
| <li>Edit the line <span class="code">remote_hosts=127.0.0.1</span> |
| </li> |
| |
| <li>Add the IP address. For example, if I have JMeter server running on <span class="code">192.168.0.10</span>, |
| …, <span class="code">192.168.0.15</span>, the entry would look like this: |
| <pre class="source">remote_hosts=192.168.0.10,192.168.0.11,192.168.0.12,192.168.0.13,192.168.0.14</pre> |
| |
| </li> |
| |
| <li>Start JMeter.</li> |
| |
| <li>Open the test plan you want to use</li> |
| |
| </ol> |
| |
| |
| <figure> |
| <a href="../images/screenshots/example-simple-plan.png"><img src="../images/screenshots/example-simple-plan.png" width="483" height="266" alt="Simple test plan"></a> |
| <figcaption>Simple test plan</figcaption> |
| </figure> |
| |
| |
| </div> |
| |
| |
| <div class="subsection"> |
| <h2 id="starting">25.2 Starting the Test<a class="sectionlink" href="#starting" title="Link to here">¶</a> |
| </h2> |
| |
| |
| <p> |
| At this point, you are ready to start load testing. If you want to double check |
| the slave systems are working, open <span class="code">jmeter.log</span> in your editor. You should see the following in the log. |
| </p> |
| |
| |
| <pre class="source"> |
| Writing log file to: /XXXX/XXXXX/bin/jmeter-server.log |
| Created remote object: UnicastServerRef [liveRef: [endpoint:[192.X.X.X:XXXXX](local),objID:[-6a665beb:15a2c8b9419:-7fff, 3180474504933847586]]] |
| </pre> |
| |
| |
| <p> |
| If you do not see this message, it means <span class="code">jmeter-server</span> did not start correctly. For tips on |
| debugging the issue, <a href="#tips">go to the tips section</a>. There are two ways to |
| initiate the test: a single system and all systems. |
| </p> |
| |
| |
| </div> |
| |
| |
| <div class="subsection"> |
| <h2 id="start-single-client">25.3 Start a single clients<a class="sectionlink" href="#start-single-client" title="Link to here">¶</a> |
| </h2> |
| |
| |
| <ol> |
| |
| <li>Click Run at the top</li> |
| |
| <li>Select Remote Start</li> |
| |
| <li>Select the IP address</li> |
| |
| </ol> |
| |
| |
| <figure> |
| <a href="../images/screenshots/example-remote-start.png"><img src="../images/screenshots/example-remote-start.png" width="490" height="196" alt="Start a single slave"></a> |
| <figcaption>Start a single slave</figcaption> |
| </figure> |
| |
| |
| </div> |
| |
| |
| <div class="subsection"> |
| <h2 id="start-all-clients">25.4 Start all clients<a class="sectionlink" href="#start-all-clients" title="Link to here">¶</a> |
| </h2> |
| |
| |
| <ol> |
| |
| <li>Click Run at the top</li> |
| |
| <li>Select Remote Start all or use <span class="keycombo"><span class="keysym">Ctrl</span> + <span class="keysym">Shift</span> + <span class="keysym">R</span></span> |
| </li> |
| |
| </ol> |
| |
| |
| <figure> |
| <a href="../images/screenshots/example-remote-start-all.png"><img src="../images/screenshots/example-remote-start-all.png" width="410" height="155" alt="Start all slaves"></a> |
| <figcaption>Start all slaves</figcaption> |
| </figure> |
| |
| |
| </div> |
| |
| |
| <div class="subsection"> |
| <h2 id="limitations">25.5 Limitations<a class="sectionlink" href="#limitations" title="Link to here">¶</a> |
| </h2> |
| |
| |
| <p> |
| There are some basic limitations for distributed testing. Here's the list of the known items in no specific order. |
| </p> |
| |
| |
| <ol> |
| |
| <li>RMI cannot communicate across subnets without a proxy; therefore neither can JMeter without a proxy.</li> |
| |
| <li>Since version 2.9, JMeter sends all the test results stripping Response data to the controlling console, this allows |
| us to reduce impact on network IO. Ensure you monitor your network traffic so that this traffic does not incur contention</li> |
| |
| <li>A single JMeter client running on a 2-3 GHz CPU (recent CPU) can handle 1000-2000 threads depending on the type of test.</li> |
| |
| </ol> |
| |
| |
| </div> |
| |
| |
| <div class="subsection"> |
| <h2 id="additional-resources">25.6 Additional resources<a class="sectionlink" href="#additional-resources" title="Link to here">¶</a> |
| </h2> |
| |
| |
| <p> |
| |
| <a href="https://cwiki.apache.org/confluence/display/JMETER/JMeterFAQ#JMeterFAQ-Howtodoremotetestingthe'properway'?">Wiki page on remote testing</a> |
| |
| </p> |
| |
| |
| <p> |
| |
| <a href="remote-test.html">Remote Testing in the user manual</a> |
| |
| </p> |
| |
| |
| </div> |
| |
| |
| <div class="subsection"> |
| <h2 id="tips">25.7 Tips<a class="sectionlink" href="#tips" title="Link to here">¶</a> |
| </h2> |
| |
| |
| <p> |
| In some cases, the firewall may still be blocking RMI traffic. |
| </p> |
| |
| |
| <h3>Anti Virus and Firewall</h3> |
| |
| |
| <div class="clear"></div> |
| <div class="note">Antivirus should be stopped during a Load Test as it can drastically impact timings leading to wrong results.</div> |
| <div class="clear"></div> |
| |
| <p> |
| Firewall needs to be stopped from windows services or at least some ports need to be opened. |
| </p> |
| |
| |
| <ol> |
| |
| <li>Open control panel</li> |
| |
| <li>Open administrative tools</li> |
| |
| <li>Double click services</li> |
| |
| <li>Go to down to Symantec anti virus, right click and select stop</li> |
| |
| </ol> |
| |
| |
| <h3>Windows firewall</h3> |
| |
| |
| <ol> |
| |
| <li>Open network connections</li> |
| |
| <li>Select the network connection</li> |
| |
| <li>Right click and select properties</li> |
| |
| <li>Select advanced tab</li> |
| |
| <li>Uncheck internet connection firewall</li> |
| |
| </ol> |
| |
| |
| <h3>Linux</h3> |
| |
| |
| <p> |
| On Linux, iptables might be turned on by default. For instructions, please refer to the |
| <a href="remote-test.html">Remote Testing in the user manual</a> |
| |
| </p> |
| |
| |
| <p> |
| On RedHat (or derivatives), iptables is turned on by default. Execute |
| <pre class="source">service iptables stop</pre> |
| to stop the Linux firewall or ensure you open the correct ports. |
| </p> |
| |
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