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| The Nemo Runner can optimize Beam pipelines with the Nemo compiler through various optimization passes |
| and execute them in a distributed fashion using the Nemo runtime. You can also deploy a self-contained application |
| for local mode or run using resource managers like YARN or Mesos.</p><p>The Nemo Runner executes Beam pipelines on top of Apache Nemo, providing:</p><ul><li>Batch and streaming pipelines</li><li>Fault-tolerance</li><li>Integration with YARN and other components of the Apache Hadoop ecosystem</li><li>Support for the various optimizations provided by the Nemo optimizer</li></ul><p>The <a href=/documentation/runners/capability-matrix/>Beam Capability Matrix</a> documents the |
| supported capabilities of the Nemo Runner.</p><h2 id=nemo-runner-prerequisites-and-setup>Nemo Runner prerequisites and setup</h2><p>The Nemo Runner can be used simply by adding a dependency on a version of the Nemo runner newer than <code>0.1</code> |
| to your pom.xml as follows:</p><pre tabindex=0><code><dependency> |
| <groupId>org.apache.nemo</groupId> |
| <artifactId>nemo-compiler-frontend-beam</artifactId> |
| <version>${nemo.version}</version> |
| </dependency> |
| <dependency> |
| <groupId>org.apache.hadoop</groupId> |
| <artifactId>hadoop-common</artifactId> |
| <version>${hadoop.version}</version> |
| <exclusions> |
| <exclusion> |
| <groupId>org.slf4j</groupId> |
| <artifactId>slf4j-api</artifactId> |
| </exclusion> |
| <exclusion> |
| <groupId>org.slf4j</groupId> |
| <artifactId>slf4j-log4j12</artifactId> |
| </exclusion> |
| </exclusions> |
| </dependency> |
| </code></pre><h2 id=deploying-nemo-with-your-application>Deploying Nemo with your Application</h2><p>A self-contained application might be easier to manage and allows you to fully use the functionality that Nemo provides. |
| Simply add the dependency shown above and shade the application JAR using the Maven Shade plugin:</p><pre tabindex=0><code><plugin> |
| <groupId>org.apache.maven.plugins</groupId> |
| <artifactId>maven-shade-plugin</artifactId> |
| <configuration> |
| <createDependencyReducedPom>false</createDependencyReducedPom> |
| <filters> |
| <filter> |
| <artifact>*:*</artifact> |
| <excludes> |
| <exclude>META-INF/*.SF</exclude> |
| <exclude>META-INF/*.DSA</exclude> |
| <exclude>META-INF/*.RSA</exclude> |
| </excludes> |
| </filter> |
| </filters> |
| </configuration> |
| <executions> |
| <execution> |
| <phase>package</phase> |
| <goals> |
| <goal>shade</goal> |
| </goals> |
| <configuration> |
| <shadedArtifactAttached>true</shadedArtifactAttached> |
| <shadedClassifierName>shaded</shadedClassifierName> |
| <transformers> |
| <transformer |
| implementation="org.apache.maven.plugins.shade.resource.ServicesResourceTransformer"/> |
| </transformers> |
| </configuration> |
| </execution> |
| </executions> |
| </plugin> |
| </code></pre><p>After running <code>mvn package</code>, run <code>ls target</code> and you should see the following output (in this example, your artifactId is <code>beam-examples</code> |
| and the version is <code>1.0.0</code>):</p><pre tabindex=0><code>beam-examples-1.0.0-shaded.jar |
| </code></pre><p>With this shaded jar, you can use the <code>bin/run_beam.sh</code> shell script as follows:</p><pre tabindex=0><code>## MapReduce example |
| ./bin/run_beam.sh \ |
| -job_id mr_default \ |
| -user_main org.apache.nemo.examples.beam.WordCount \ |
| -user_args "`pwd`/examples/resources/test_input_wordcount `pwd`/examples/resources/test_output_wordcount" |
| </code></pre><p>To use Nemo using YARN, set the <code>-deploy_mode</code> flag on Nemo to <code>yarn</code>.</p><p>More instructions can be seen on the README of the <a href=https://github.com/apache/incubator-nemo>Apache Nemo GitHub</a>.</p><h2 id=pipeline-options-for-the-nemo-runner>Pipeline Options for the Nemo Runner</h2><p>When executing your pipeline with the Nemo Runner, you should consider the following pipeline options:</p><table><thead><tr><th>Field</th><th>Description</th><th style=text-align:right>Default Value</th></tr></thead><tbody><tr><td><code>runner</code></td><td>The pipeline runner to use. This option allows you to determine the pipeline runner at runtime.</td><td style=text-align:right>Set to <code>NemoRunner</code> to run using Nemo.</td></tr><tr><td><code>maxBundleSize</code></td><td>The maximum number of elements in a bundle.</td><td style=text-align:right>1000</td></tr><tr><td><code>maxBundleTimeMillis</code></td><td>The maximum time to wait before finalizing a bundle (in milliseconds).</td><td style=text-align:right>1000</td></tr></tbody></table><p>More options are to be added to the list, to fully support the various options that Nemo supports.</p><h2 id=additional-information-and-caveats>Additional Information and Caveats</h2><h3 id=using-the-run_beamsh-script>Using the Run_beam.sh script</h3><p>When submitting a Nemo application to the cluster, it is common to use the <code>bin/run_beam.sh</code> script that is |
| provided within the Nemo installation. The script also provides a richer set of options that you can pass on to |
| configure various actions of Nemo. Please refer to the |
| <a href=https://github.com/apache/incubator-nemo>Apache Nemo GitHub README</a> for more information.</p><h3 id=monitoring-your-job>Monitoring your job</h3><p>You can monitor a running Nemo job using the Nemo WebUI. The docs are currently being updated, but more |
| information can be found on the <a href=https://github.com/apache/incubator-nemo>Apache Nemo GitHub README</a>.</p><h3 id=streaming-execution>Streaming Execution</h3><p>Add the options <code>-scheduler_impl_class_name org.apache.nemo.runtime.master.scheduler.StreamingScheduler</code> |
| and <code>-optimization_policy org.apache.nemo.compiler.optimizer.policy.StreamingPolicy</code> to set the Nemo Runner |
| to streaming mode. |
| Also, be sure to extend the <code>capacity</code> of the resources in the <code>resources.json</code>, for example:</p><pre tabindex=0><code>{ |
| "type": "Reserved", |
| "memory_mb": 2048, |
| "capacity": 50000 |
| } |
| </code></pre><p>Please refer to the <a href=https://github.com/apache/incubator-nemo>Apache Nemo GitHub README</a> for more information.</p><div class=feedback><p class=update>Last updated on 2024/05/06</p><h3>Have you found everything you were looking for?</h3><p class=description>Was it all useful and clear? Is there anything that you would like to change? Let us know!</p><button class=load-button><a href="https://docs.google.com/forms/d/e/1FAIpQLSfID7abne3GE6k6RdJIyZhPz2Gef7UkpggUEhTIDjjplHuxSA/viewform?usp=header_link" target=_blank>SEND FEEDBACK</a></button></div></div></div><footer class=footer><div class=footer__contained><div class=footer__cols><div class="footer__cols__col footer__cols__col__logos"><div class=footer__cols__col__logo><img src=/images/beam_logo_circle.svg class=footer__logo alt="Beam logo"></div><div class=footer__cols__col__logo><img src=/images/apache_logo_circle.svg class=footer__logo alt="Apache logo"></div></div><div class=footer-wrapper><div class=wrapper-grid><div class=footer__cols__col><div class=footer__cols__col__title>Start</div><div class=footer__cols__col__link><a href=/get-started/beam-overview/>Overview</a></div><div class=footer__cols__col__link><a href=/get-started/quickstart-java/>Quickstart (Java)</a></div><div class=footer__cols__col__link><a href=/get-started/quickstart-py/>Quickstart (Python)</a></div><div class=footer__cols__col__link><a href=/get-started/quickstart-go/>Quickstart (Go)</a></div><div class=footer__cols__col__link><a href=/get-started/downloads/>Downloads</a></div></div><div class=footer__cols__col><div class=footer__cols__col__title>Docs</div><div class=footer__cols__col__link><a href=/documentation/programming-guide/>Concepts</a></div><div class=footer__cols__col__link><a href=/documentation/pipelines/design-your-pipeline/>Pipelines</a></div><div class=footer__cols__col__link><a href=/documentation/runners/capability-matrix/>Runners</a></div></div><div class=footer__cols__col><div class=footer__cols__col__title>Community</div><div class=footer__cols__col__link><a href=/contribute/>Contribute</a></div><div class=footer__cols__col__link><a href=https://projects.apache.org/committee.html?beam target=_blank>Team<img src=/images/external-link-icon.png width=14 height=14 alt="External link."></a></div><div class=footer__cols__col__link><a href=/community/presentation-materials/>Media</a></div><div class=footer__cols__col__link><a href=/community/in-person/>Events/Meetups</a></div><div class=footer__cols__col__link><a href=/community/contact-us/>Contact Us</a></div></div><div class=footer__cols__col><div class=footer__cols__col__title>Resources</div><div class=footer__cols__col__link><a href=/blog/>Blog</a></div><div class=footer__cols__col__link><a href=https://github.com/apache/beam>GitHub</a></div></div></div><div class=footer__bottom>© |
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