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| <h1>Getting Started</h1> |
| <div id="markdown-content-container"><h1 id="nemo">Nemo</h1> |
| |
| <p><a href="https://travis-ci.org/apache/incubator-nemo"><img src="https://travis-ci.org/apache/incubator-nemo.svg?branch=master" alt="Build Status" /></a> |
| <a href="https://sonarcloud.io/dashboard?id=org.apache.nemo%3Anemo-project"><img src="https://sonarcloud.io/api/project_badges/measure?project=org.apache.nemo%3Anemo-project&metric=alert_status" alt="Quality Gate Status" /></a></p> |
| |
| <p>A Data Processing System for Flexible Employment With Different Deployment Characteristics.</p> |
| |
| <h2 id="online-documentation">Online Documentation</h2> |
| |
| <p>Details about Nemo and its development can be found in:</p> |
| <ul> |
| <li>Our website: https://nemo.apache.org/</li> |
| <li>Our project wiki: https://cwiki.apache.org/confluence/display/NEMO/</li> |
| <li>Our Dev mailing list for contributing: dev@nemo.apache.org <a href="mailto:dev-subscribe@nemo.apache.org">(subscribe)</a></li> |
| </ul> |
| |
| <p>Please refer to the <a href=".github/CONTRIBUTING.md">Contribution guideline</a> to contribute to our project.</p> |
| |
| <h2 id="nemo-prerequisites-and-setup">Nemo prerequisites and setup</h2> |
| |
| <h3 id="prerequisites">Prerequisites</h3> |
| <ul> |
| <li>Java 8 or later (tested on Java 8 and Java 11)</li> |
| <li>Maven</li> |
| <li>YARN settings |
| <ul> |
| <li>Download Hadoop 2.7.2 at https://archive.apache.org/dist/hadoop/common/hadoop-2.7.2/</li> |
| <li>Set the shell profile as following: |
| <div class="language-bash highlighter-rouge"><pre class="highlight"><code> <span class="nb">export </span><span class="nv">HADOOP_HOME</span><span class="o">=</span>/path/to/hadoop-2.7.2 |
| <span class="nb">export </span><span class="nv">YARN_HOME</span><span class="o">=</span><span class="nv">$HADOOP_HOME</span> |
| <span class="nb">export </span><span class="nv">PATH</span><span class="o">=</span><span class="nv">$PATH</span>:<span class="nv">$HADOOP_HOME</span>/bin |
| </code></pre> |
| </div> |
| </li> |
| </ul> |
| </li> |
| <li>Protobuf 2.5.0 |
| <ul> |
| <li> |
| <p>On Ubuntu 14.04 LTS and its point releases:</p> |
| |
| <div class="language-bash highlighter-rouge"><pre class="highlight"><code><span class="gp">$ </span>sudo apt-get install protobuf-compiler |
| </code></pre> |
| </div> |
| </li> |
| <li> |
| <p>On Ubuntu 16.04 LTS and its point releases:</p> |
| |
| <div class="language-bash highlighter-rouge"><pre class="highlight"><code><span class="gp">$ </span>sudo add-apt-repository ppa:snuspl/protobuf-250 |
| <span class="gp">$ </span>sudo apt update |
| <span class="gp">$ </span>sudo apt install protobuf-compiler<span class="o">=</span>2.5.0-9xenial1 |
| </code></pre> |
| </div> |
| </li> |
| <li> |
| <p>On macOS:</p> |
| |
| <div class="language-bash highlighter-rouge"><pre class="highlight"><code><span class="gp">$ </span>wget https://github.com/google/protobuf/releases/download/v2.5.0/protobuf-2.5.0.tar.bz2 |
| <span class="gp">$ </span>tar xvf protobuf-2.5.0.tar.bz2 |
| <span class="gp">$ </span><span class="nb">pushd </span>protobuf-2.5.0 |
| <span class="gp">$ </span>./configure <span class="nv">CC</span><span class="o">=</span>clang <span class="nv">CXX</span><span class="o">=</span>clang++ <span class="nv">CXXFLAGS</span><span class="o">=</span><span class="s1">'-std=c++11 -stdlib=libc++ -O3 -g'</span> <span class="nv">LDFLAGS</span><span class="o">=</span><span class="s1">'-stdlib=libc++'</span> <span class="nv">LIBS</span><span class="o">=</span><span class="s2">"-lc++ -lc++abi"</span> |
| <span class="gp">$ </span>make -j 4 |
| <span class="gp">$ </span>sudo make install |
| <span class="gp">$ </span><span class="nb">popd</span> |
| </code></pre> |
| </div> |
| </li> |
| <li> |
| <p>Or build from source:</p> |
| |
| <ul> |
| <li>Downloadable at https://github.com/google/protobuf/releases/tag/v2.5.0</li> |
| <li>Extract the downloaded tarball</li> |
| <li><code class="highlighter-rouge">$ ./configure</code></li> |
| <li><code class="highlighter-rouge">$ make</code></li> |
| <li><code class="highlighter-rouge">$ make check</code></li> |
| <li><code class="highlighter-rouge">$ sudo make install</code></li> |
| </ul> |
| </li> |
| <li> |
| <p>To check for a successful installation of version 2.5.0, run <code class="highlighter-rouge">$ protoc --version</code></p> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| |
| <h3 id="installing-nemo">Installing Nemo</h3> |
| <ul> |
| <li>Run all tests and install: <code class="highlighter-rouge">$ mvn clean install -T 2C</code></li> |
| <li>Run only unit tests and install: <code class="highlighter-rouge">$ mvn clean install -DskipITs -T 2C</code></li> |
| </ul> |
| |
| <h2 id="running-beam-applications">Running Beam applications</h2> |
| |
| <p>Apache Nemo is an official runner of Apache Beam, and it can be executed from Beam, using NemoRunner, as well as directly from the Nemo project. |
| The details of using NemoRunner from Beam is shown on the <a href="https://beam.apache.org/documentation/runners/nemo/">NemoRunner page of the Apache Beam website</a>. |
| Below describes how Beam applications can be run directly on Nemo.</p> |
| |
| <h3 id="configurable-options">Configurable options</h3> |
| <ul> |
| <li><code class="highlighter-rouge">-job_id</code>: ID of the Beam job</li> |
| <li><code class="highlighter-rouge">-user_main</code>: Canonical name of the Beam application</li> |
| <li><code class="highlighter-rouge">-user_args</code>: Arguments that the Beam application accepts</li> |
| <li><code class="highlighter-rouge">-optimization_policy</code>: Canonical name of the optimization policy to apply to a job DAG in Nemo Compiler</li> |
| <li><code class="highlighter-rouge">-deploy_mode</code>: <code class="highlighter-rouge">yarn</code> is supported(default value is <code class="highlighter-rouge">local</code>)</li> |
| </ul> |
| |
| <h3 id="examples">Examples</h3> |
| <div class="language-bash highlighter-rouge"><pre class="highlight"><code><span class="c">## WordCount example from the Beam website (Count words from a document)</span> |
| <span class="gp">$ </span>./bin/run_beam.sh <span class="se">\</span> |
| -job_id beam_wordcount <span class="se">\</span> |
| -optimization_policy org.apache.nemo.compiler.optimizer.policy.DefaultPolicy <span class="se">\</span> |
| -user_main org.apache.nemo.examples.beam.BeamWordCount <span class="se">\</span> |
| -user_args <span class="s2">"--runner=NemoRunner --inputFile=</span><span class="sb">`</span><span class="nb">pwd</span><span class="sb">`</span><span class="s2">/examples/resources/inputs/test_input_wordcount --output=</span><span class="sb">`</span><span class="nb">pwd</span><span class="sb">`</span><span class="s2">/outputs/wordcount"</span> |
| <span class="gp">$ </span>less <span class="sb">`</span><span class="nb">pwd</span><span class="sb">`</span>/outputs/wordcount<span class="k">*</span> |
| |
| <span class="c">## MapReduce WordCount example (Count words from the Wikipedia dataset)</span> |
| <span class="gp">$ </span>./bin/run_beam.sh <span class="se">\</span> |
| -job_id mr_default <span class="se">\</span> |
| -executor_json <span class="sb">`</span><span class="nb">pwd</span><span class="sb">`</span>/examples/resources/executors/beam_test_executor_resources.json <span class="se">\</span> |
| -optimization_policy org.apache.nemo.compiler.optimizer.policy.DefaultPolicy <span class="se">\</span> |
| -user_main org.apache.nemo.examples.beam.WordCount <span class="se">\</span> |
| -user_args <span class="s2">"</span><span class="sb">`</span><span class="nb">pwd</span><span class="sb">`</span><span class="s2">/examples/resources/inputs/test_input_wordcount </span><span class="sb">`</span><span class="nb">pwd</span><span class="sb">`</span><span class="s2">/outputs/wordcount"</span> |
| <span class="gp">$ </span>less <span class="sb">`</span><span class="nb">pwd</span><span class="sb">`</span>/outputs/wordcount<span class="k">*</span> |
| |
| <span class="c">## YARN cluster example</span> |
| <span class="gp">$ </span>./bin/run_beam.sh <span class="se">\</span> |
| -deploy_mode yarn <span class="se">\</span> |
| -job_id mr_transient <span class="se">\</span> |
| -executor_json <span class="sb">`</span><span class="nb">pwd</span><span class="sb">`</span>/examples/resources/executors/beam_test_executor_resources.json <span class="se">\</span> |
| -user_main org.apache.nemo.examples.beam.WordCount <span class="se">\</span> |
| -optimization_policy org.apache.nemo.compiler.optimizer.policy.TransientResourcePolicy <span class="se">\</span> |
| -user_args <span class="s2">"hdfs://v-m:9000/test_input_wordcount hdfs://v-m:9000/test_output_wordcount"</span> |
| |
| <span class="c">## NEXMark streaming Q0 (query0) example</span> |
| <span class="gp">$ </span>./bin/run_nexmark.sh <span class="se">\</span> |
| -job_id nexmark-Q0 <span class="se">\</span> |
| -executor_json <span class="sb">`</span><span class="nb">pwd</span><span class="sb">`</span>/examples/resources/executors/beam_test_executor_resources.json <span class="se">\</span> |
| -user_main org.apache.beam.sdk.nexmark.Main <span class="se">\</span> |
| -optimization_policy org.apache.nemo.compiler.optimizer.policy.StreamingPolicy <span class="se">\</span> |
| -scheduler_impl_class_name org.apache.nemo.runtime.master.scheduler.StreamingScheduler <span class="se">\</span> |
| -user_args <span class="s2">"--runner=NemoRunner --streaming=true --query=0 --numEventGenerators=1"</span> |
| |
| </code></pre> |
| </div> |
| <h2 id="resource-configuration">Resource Configuration</h2> |
| <p><code class="highlighter-rouge">-executor_json</code> command line option can be used to provide a path to the JSON file that describes resource configuration for executors. Its default value is <code class="highlighter-rouge">config/default.json</code>, which initializes one of each <code class="highlighter-rouge">Transient</code>, <code class="highlighter-rouge">Reserved</code>, and <code class="highlighter-rouge">Compute</code> executor, each of which has one core and 1024MB memory.</p> |
| |
| <h3 id="configurable-options-1">Configurable options</h3> |
| <ul> |
| <li><code class="highlighter-rouge">num</code> (optional): Number of containers. Default value is 1</li> |
| <li><code class="highlighter-rouge">type</code>: Three container types are supported: |
| <ul> |
| <li><code class="highlighter-rouge">Transient</code> : Containers that store eviction-prone resources. When batch jobs use idle resources in <code class="highlighter-rouge">Transient</code> containers, they can be arbitrarily evicted when latency-critical jobs attempt to use the resources.</li> |
| <li><code class="highlighter-rouge">Reserved</code> : Containers that store eviction-free resources. <code class="highlighter-rouge">Reserved</code> containers are used to reliably store intermediate data which have high eviction cost.</li> |
| <li><code class="highlighter-rouge">Compute</code> : Containers that are mainly used for computation.</li> |
| </ul> |
| </li> |
| <li><code class="highlighter-rouge">memory_mb</code>: Memory size in MB</li> |
| <li><code class="highlighter-rouge">capacity</code>: Number of <code class="highlighter-rouge">Task</code>s that can be run in an executor. Set this value to be the same as the number of CPU cores of the container.</li> |
| </ul> |
| |
| <h3 id="examples-1">Examples</h3> |
| <div class="language-json highlighter-rouge"><pre class="highlight"><code><span class="p">[</span><span class="w"> |
| </span><span class="p">{</span><span class="w"> |
| </span><span class="nt">"num"</span><span class="p">:</span><span class="w"> </span><span class="mi">12</span><span class="p">,</span><span class="w"> |
| </span><span class="nt">"type"</span><span class="p">:</span><span class="w"> </span><span class="s2">"Transient"</span><span class="p">,</span><span class="w"> |
| </span><span class="nt">"memory_mb"</span><span class="p">:</span><span class="w"> </span><span class="mi">1024</span><span class="p">,</span><span class="w"> |
| </span><span class="nt">"capacity"</span><span class="p">:</span><span class="w"> </span><span class="mi">4</span><span class="w"> |
| </span><span class="p">},</span><span class="w"> |
| </span><span class="p">{</span><span class="w"> |
| </span><span class="nt">"type"</span><span class="p">:</span><span class="w"> </span><span class="s2">"Reserved"</span><span class="p">,</span><span class="w"> |
| </span><span class="nt">"memory_mb"</span><span class="p">:</span><span class="w"> </span><span class="mi">1024</span><span class="p">,</span><span class="w"> |
| </span><span class="nt">"capacity"</span><span class="p">:</span><span class="w"> </span><span class="mi">2</span><span class="w"> |
| </span><span class="p">}</span><span class="w"> |
| </span><span class="p">]</span><span class="w"> |
| </span></code></pre> |
| </div> |
| |
| <p>This example configuration specifies</p> |
| <ul> |
| <li>12 transient containers with 4 cores and 1024MB memory each</li> |
| <li>1 reserved container with 2 cores and 1024MB memory</li> |
| </ul> |
| |
| <h2 id="monitoring-your-job-using-web-ui">Monitoring your job using Web UI</h2> |
| <p>Please refer to the instructions at <code class="highlighter-rouge">web-ui/README.md</code> to run the frontend.</p> |
| |
| <h3 id="visualizing-metric-on-run-time">Visualizing metric on run-time</h3> |
| |
| <p>While Nemo driver is alive, it can post runtime metrics through websocket. At your frontend, add websocket endpoint</p> |
| |
| <div class="highlighter-rouge"><pre class="highlight"><code>ws://<DRIVER>:10101/api/websocket |
| </code></pre> |
| </div> |
| |
| <p>where <code class="highlighter-rouge"><DRIVER></code> is the hostname that Nemo driver runs.</p> |
| |
| <p>OR, you can directly run the WebUI on the driver using <code class="highlighter-rouge">bin/run_webserver.sh</code>, |
| where it looks for the websocket on its local machine, |
| which, by default, provides the address at</p> |
| |
| <div class="highlighter-rouge"><pre class="highlight"><code>http://<DRIVER>:3333 |
| </code></pre> |
| </div> |
| |
| <h3 id="post-job-analysis">Post-job analysis</h3> |
| |
| <p>On job completion, the Nemo driver creates <code class="highlighter-rouge">metric.json</code> at the directory specified by <code class="highlighter-rouge">-dag_dir</code> option. At your frontend, add the JSON file to do post-job analysis.</p> |
| |
| <p>Other JSON files are for legacy Web UI, hosted <a href="https:/nemo.snuspl.snu.ac.kr:50443/nemo-dag/">here</a>. It uses <a href="https://www.graphviz.org/">Graphviz</a> to visualize IR DAGs and execution plans.</p> |
| |
| <h3 id="examples-2">Examples</h3> |
| <div class="language-bash highlighter-rouge"><pre class="highlight"><code><span class="gp">$ </span>./bin/run_beam.sh <span class="se">\</span> |
| -job_id als <span class="se">\</span> |
| -executor_json <span class="sb">`</span><span class="nb">pwd</span><span class="sb">`</span>/examples/resources/executors/beam_test_executor_resources.json <span class="se">\</span> |
| -user_main org.apache.nemo.examples.beam.AlternatingLeastSquare <span class="se">\</span> |
| -optimization_policy org.apache.nemo.compiler.optimizer.policy.TransientResourcePolicy <span class="se">\</span> |
| -dag_dir <span class="s2">"./dag/als"</span> <span class="se">\</span> |
| -user_args <span class="s2">"</span><span class="sb">`</span><span class="nb">pwd</span><span class="sb">`</span><span class="s2">/examples/resources/inputs/test_input_als 10 3"</span> |
| </code></pre> |
| </div> |
| |
| <h2 id="options-for-writing-metric-results-to-databases">Options for writing metric results to databases.</h2> |
| |
| <ul> |
| <li><code class="highlighter-rouge">-db_enabled</code>: Whether or not to turn on the DB (<code class="highlighter-rouge">true</code> or <code class="highlighter-rouge">false</code>).</li> |
| <li><code class="highlighter-rouge">-db_address</code>: Address of the DB. (ex. PostgreSQL DB starts with <code class="highlighter-rouge">jdbc:postgresql://...</code>)</li> |
| <li><code class="highlighter-rouge">-db_id</code> : ID of the DB from the given address.</li> |
| <li><code class="highlighter-rouge">-db_password</code>: Credentials for the DB from the given address.</li> |
| </ul> |
| |
| <h2 id="speeding-up-builds">Speeding up builds</h2> |
| <ul> |
| <li>To exclude Spark related packages: mvn clean install -T 2C -DskipTests -pl \!compiler/frontend/spark,\!examples/spark</li> |
| <li>To exclude Beam related packages: mvn clean install -T 2C -DskipTests -pl \!compiler/frontend/beam,\!examples/beam</li> |
| <li>To exclude NEXMark related packages: mvn clean install -T 2C -DskipTests -pl \!examples/nexmark</li> |
| </ul> |
| |
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