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</a><div class="searchBox_ZlJk"><button type="button" class="DocSearch DocSearch-Button" aria-label="Search"><span class="DocSearch-Button-Container"><svg width="20" height="20" class="DocSearch-Search-Icon" viewBox="0 0 20 20" aria-hidden="true"><path d="M14.386 14.386l4.0877 4.0877-4.0877-4.0877c-2.9418 2.9419-7.7115 2.9419-10.6533 0-2.9419-2.9418-2.9419-7.7115 0-10.6533 2.9418-2.9419 7.7115-2.9419 10.6533 0 2.9419 2.9418 2.9419 7.7115 0 10.6533z" stroke="currentColor" fill="none" fill-rule="evenodd" stroke-linecap="round" stroke-linejoin="round"></path></svg><span class="DocSearch-Button-Placeholder">Search</span></span><span class="DocSearch-Button-Keys"></span></button></div></div></div><div role="presentation" class="navbar-sidebar__backdrop"></div></nav><div id="__docusaurus_skipToContent_fallback" class="main-wrapper mainWrapper_z2l0 docsWrapper_BCFX"><button aria-label="Scroll back to top" class="clean-btn theme-back-to-top-button backToTopButton_sjWU" type="button"></button><div class="docPage__5DB"><main class="docMainContainer_gTbr docMainContainerEnhanced_Uz_u"><div class="container padding-top--md padding-bottom--lg"><div class="row"><div class="col docItemCol_VOVn"><div class="docItemContainer_Djhp"><article><span class="theme-doc-version-badge badge badge--secondary">Version: Next</span><div class="tocCollapsible_ETCw theme-doc-toc-mobile tocMobile_ITEo"><button type="button" class="clean-btn tocCollapsibleButton_TO0P">On this page</button></div><div class="theme-doc-markdown markdown"><h1>Load testing with Locust</h1><p><a href="https://locust.io/" target="_blank" rel="noopener noreferrer">Locust</a> is an open-source, python-based, easy-to-use load testing tool. It provides an interface to
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spawn multiple users (swarm) that behave according to pre-defined python code.</p><p>In this directory, we provide some example locust configs that send common requests to DataHub GMS (ingest, search,
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browse, and graph).</p><h2 class="anchor anchorWithStickyNavbar_LWe7" id="prerequisites">Prerequisites<a href="#prerequisites" class="hash-link" aria-label="Direct link to Prerequisites" title="Direct link to Prerequisites"></a></h2><p>To run the example configs, you need to first install locust by running</p><div class="language-shell codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-shell codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token plain">pip3 </span><span class="token function" style="color:rgb(130, 170, 255)">install</span><span class="token plain"> locust</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><p>Note that it supports python versions 3.6 and up. Refer to
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this <a href="https://docs.locust.io/en/stable/installation.html" target="_blank" rel="noopener noreferrer">guide</a> for more details.</p><p>You will also need to import requirements in order to run the Locustfile scripts:</p><div class="language-shell codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-shell codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token plain">pip3 </span><span class="token function" style="color:rgb(130, 170, 255)">install</span><span class="token plain"> -r requirements.txt</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h2 class="anchor anchorWithStickyNavbar_LWe7" id="locustfiles">Locustfiles<a href="#locustfiles" class="hash-link" aria-label="Direct link to Locustfiles" title="Direct link to Locustfiles"></a></h2><p><a href="https://github.com/datahub-project/datahub/blob/master/perf-test/locustfiles" target="_blank" rel="noopener noreferrer">Locustfiles</a> define how the users will behave once they are spawned. Refer to
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this <a href="https://docs.locust.io/en/stable/writing-a-locustfile.html" target="_blank" rel="noopener noreferrer">doc</a> on how to write one.</p><p>Here, we have defined 4 common requests</p><ul><li>Ingest: ingests a dataset with a random URN with properties, browse paths, and ownership aspects filled out</li><li>Search: searches datasets with query "test"</li><li>Browse: browses datasets with path "/perf/test"</li><li>Graph: gets datasets owned by user "common"</li></ul><p>We will continue adding more as more use cases arise, but feel free to play around with the default behavior to create a
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load test that matches your request pattern.</p><h2 class="anchor anchorWithStickyNavbar_LWe7" id="load-testing">Load testing<a href="#load-testing" class="hash-link" aria-label="Direct link to Load testing" title="Direct link to Load testing"></a></h2><p>There are two ways to run locust. One is through the web interface, and the other is on the command line.</p><h3 class="anchor anchorWithStickyNavbar_LWe7" id="web-interface">Web interface<a href="#web-interface" class="hash-link" aria-label="Direct link to Web interface" title="Direct link to Web interface"></a></h3><p>To run through the web interface, you can run the following</p><div class="language-shell codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-shell codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token plain">locust -f </span><span class="token operator" style="color:rgb(137, 221, 255)"><<</span><span class="token plain">path-to-locustfile</span><span class="token operator" style="color:rgb(137, 221, 255)">>></span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><p>For instance, to run ingest load testing, run the following from root of repo.</p><div class="language-shell codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-shell codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token plain">locust -f perf-test/locustfiles/ingest.py</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><p>This will set up the web interface in http://localhost:8089 (unless the port is already taken). Once you click into it,
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you should see the following</p><p align="center"><img loading="lazy" width="70%" src="https://raw.githubusercontent.com/datahub-project/static-assets/main/imgs/locust-example.png" class="img_ev3q"></p><p>Input the number of users you would like to spawn and the spawn rate. Point the host to the deployed DataHub GMS (
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locally, it should be http://localhost:8080). Click on the "Start swarming" button to start the load test.</p><p>The web interface should give you statistics on number of requests, latency, response rate, etc.</p><h3 class="anchor anchorWithStickyNavbar_LWe7" id="command-line">Command Line<a href="#command-line" class="hash-link" aria-label="Direct link to Command Line" title="Direct link to Command Line"></a></h3><p>To run on the command line, run the following</p><div class="language-shell codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-shell codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token plain">locust -f </span><span class="token operator" style="color:rgb(137, 221, 255)"><<</span><span class="token plain">path-to-locustfile</span><span class="token operator" style="color:rgb(137, 221, 255)">>></span><span class="token plain"> --headless -H </span><span class="token operator" style="color:rgb(137, 221, 255)"><<</span><span class="token plain">host</span><span class="token operator" style="color:rgb(137, 221, 255)">>></span><span class="token plain"> -u </span><span class="token operator" style="color:rgb(137, 221, 255)"><<</span><span class="token plain">num-users</span><span class="token operator" style="color:rgb(137, 221, 255)">>></span><span class="token plain"> -r </span><span class="token operator" style="color:rgb(137, 221, 255)"><<</span><span class="token plain">spawn-rate</span><span class="token operator" style="color:rgb(137, 221, 255)">>></span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><p>For instance, to replicate the setting in the previous section, run the following</p><div class="language-shell codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-shell codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token plain">locust -f perf-test/locustfiles/ingest.py --headless -H http://localhost:8080 -u </span><span class="token number" style="color:rgb(247, 140, 108)">100</span><span class="token plain"> -r </span><span class="token number" style="color:rgb(247, 140, 108)">100</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><p>It should start the load test and print out statistics on the command line.</p><h2 class="anchor anchorWithStickyNavbar_LWe7" id="reference">Reference<a href="#reference" class="hash-link" aria-label="Direct link to Reference" title="Direct link to Reference"></a></h2><p>For more details on how to run locust and various configs, refer to
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this <a href="https://docs.locust.io/en/stable/configuration.html" target="_blank" rel="noopener noreferrer">doc</a></p><p>To customize the user behavior by modifying the locustfiles, refer to
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this <a href="https://docs.locust.io/en/stable/writing-a-locustfile.html" target="_blank" rel="noopener noreferrer">doc</a></p></div><footer class="theme-doc-footer docusaurus-mt-lg"><div class="slackUtm_uoBr"><div class="slackUtm_uoBr"><hr>Need more help? 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