Added: zeppelin/site/docs/0.7.3/interpreter/livy.html URL: http://svn.apache.org/viewvc/zeppelin/site/docs/0.7.3/interpreter/livy.html?rev=1809223&view=auto ============================================================================== --- zeppelin/site/docs/0.7.3/interpreter/livy.html (added) +++ zeppelin/site/docs/0.7.3/interpreter/livy.html Thu Sep 21 20:33:57 2017 @@ -0,0 +1,455 @@ + +<!DOCTYPE html> +<html lang="en"> + <head> + <meta charset="utf-8"> + <title>Apache Zeppelin 0.7.3 Documentation: Livy Interpreter for Apache Zeppelin</title> + <meta name="description" content="Livy is an open source REST interface for interacting with Spark from anywhere. 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href="/docs/0.7.3/install/spark_cluster_mode.html#spark-on-yarn-mode">Zeppelin on Spark Cluster Mode (YARN)</a></li> + <li><a href="/docs/0.7.3/install/spark_cluster_mode.html#spark-on-mesos-mode">Zeppelin on Spark Cluster Mode (Mesos)</a></li> + <li><a href="/docs/0.7.3/install/cdh.html">Zeppelin on CDH</a></li> + <li role="separator" class="divider"></li> + <li class="title"><span><b>Contibute</b><span></li> + <li><a href="/docs/0.7.3/development/writingzeppelininterpreter.html">Writing Zeppelin Interpreter</a></li> + <li><a href="/docs/0.7.3/development/writingzeppelinvisualization.html">Writing Zeppelin Visualization (Experimental)</a></li> + <li><a href="/docs/0.7.3/development/writingzeppelinapplication.html">Writing Zeppelin Application (Experimental)</a></li> + <li><a href="/docs/0.7.3/development/howtocontribute.html">How to contribute (code)</a></li> + <li><a href="/docs/0.7.3/development/howtocontributewebsite.html">How to contribute (website)</a></li> + </ul> + </li> + <li> + <a href="/docs/0.7.3/search.html" class="nav-search-link"> + <span class="fa fa-search nav-search-icon"></span> + </a> + </li> + </ul> + </nav><!--/.navbar-collapse --> + </div> + </div> + + + + <div class="content"> + +<!--<div class="hero-unit Livy Interpreter for Apache Zeppelin"> + <h1></h1> +</div> +--> + +<div class="row"> + <div class="col-md-12"> + <!-- +Licensed under the Apache License, Version 2.0 (the "License"); +you may not use this file except in compliance with the License. +You may obtain a copy of the License at + +http://www.apache.org/licenses/LICENSE-2.0 + +Unless required by applicable law or agreed to in writing, software +distributed under the License is distributed on an "AS IS" BASIS, +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +See the License for the specific language governing permissions and +limitations under the License. +--> + +<h1>Livy Interpreter for Apache Zeppelin</h1> + +<div id="toc"></div> + +<h2>Overview</h2> + +<p><a href="http://livy.io/";>Livy</a> is an open source REST interface for interacting with Spark from anywhere. It supports executing snippets of code or programs in a Spark context that runs locally or in YARN.</p> + +<ul> +<li>Interactive Scala, Python and R shells</li> +<li>Batch submissions in Scala, Java, Python</li> +<li>Multi users can share the same server (impersonation support)</li> +<li>Can be used for submitting jobs from anywhere with REST</li> +<li>Does not require any code change to your programs</li> +</ul> + +<h3>Requirements</h3> + +<p>Additional requirements for the Livy interpreter are:</p> + +<ul> +<li>Spark 1.3 or above.</li> +<li>Livy server.</li> +</ul> + +<h2>Configuration</h2> + +<p>We added some common configurations for spark, and you can set any configuration you want. +You can find all Spark configurations in <a href="http://spark.apache.org/docs/latest/configuration.html#available-properties";>here</a>. +And instead of starting property with <code>spark.</code> it should be replaced with <code>livy.spark.</code>. +Example: <code>spark.driver.memory</code> to <code>livy.spark.driver.memory</code></p> + +<table class="table-configuration"> + <tr> + <th>Property</th> + <th>Default</th> + <th>Description</th> + </tr> + <tr> + <td>zeppelin.livy.url</td> + <td>http://localhost:8998</td> + <td>URL where livy server is running</td> + </tr> + <tr> + <td>zeppelin.livy.spark.maxResult</td> + <td>1000</td> + <td>Max number of Spark SQL result to display.</td> + </tr> + <tr> + <td>zeppelin.livy.session.create_timeout</td> + <td>120</td> + <td>Timeout in seconds for session creation</td> + </tr> + <tr> + <td>zeppelin.livy.displayAppInfo</td> + <td>true</td> + <td>Whether to display app info</td> + </tr> + <tr> + <td>zeppelin.livy.pull_status.interval.millis</td> + <td>1000</td> + <td>The interval for checking paragraph execution status</td> + </tr> + <tr> + <td>livy.spark.driver.cores</td> + <td></td> + <td>Driver cores. ex) 1, 2.</td> + </tr> + <tr> + <td>livy.spark.driver.memory</td> + <td></td> + <td>Driver memory. ex) 512m, 32g.</td> + </tr> + <tr> + <td>livy.spark.executor.instances</td> + <td></td> + <td>Executor instances. ex) 1, 4.</td> + </tr> + <tr> + <td>livy.spark.executor.cores</td> + <td></td> + <td>Num cores per executor. ex) 1, 4.</td> + </tr> + <tr> + <td>livy.spark.executor.memory</td> + <td></td> + <td>Executor memory per worker instance. ex) 512m, 32g.</td> + </tr> + <tr> + <td>livy.spark.dynamicAllocation.enabled</td> + <td></td> + <td>Use dynamic resource allocation. ex) True, False.</td> + </tr> + <tr> + <td>livy.spark.dynamicAllocation.cachedExecutorIdleTimeout</td> + <td></td> + <td>Remove an executor which has cached data blocks.</td> + </tr> + <tr> + <td>livy.spark.dynamicAllocation.minExecutors</td> + <td></td> + <td>Lower bound for the number of executors.</td> + </tr> + <tr> + <td>livy.spark.dynamicAllocation.initialExecutors</td> + <td></td> + <td>Initial number of executors to run.</td> + </tr> + <tr> + <td>livy.spark.dynamicAllocation.maxExecutors</td> + <td></td> + <td>Upper bound for the number of executors.</td> + </tr> + <tr> + <td>livy.spark.jars.packages</td> + <td></td> + <td>Adding extra libraries to livy interpreter</td> + </tr> + <tr> + <td>zeppelin.livy.ssl.trustStore</td> + <td></td> + <td>client trustStore file. Used when livy ssl is enabled</td> + </tr> + <tr> + <td>zeppelin.livy.ssl.trustStorePassword</td> + <td></td> + <td>password for trustStore file. Used when livy ssl is enabled</td> + </tr> +</table> + +<p><strong>We remove livy.spark.master in zeppelin-0.7. Because we sugguest user to use livy 0.3 in zeppelin-0.7. And livy 0.3 don't allow to specify livy.spark.master, it enfornce yarn-cluster mode.</strong></p> + +<h2>Adding External libraries</h2> + +<p>You can load dynamic library to livy interpreter by set <code>livy.spark.jars.packages</code> property to comma-separated list of maven coordinates of jars to include on the driver and executor classpaths. The format for the coordinates should be groupId:artifactId:version.</p> + +<p>Example</p> + +<table class="table-configuration"> + <tr> + <th>Property</th> + <th>Example</th> + <th>Description</th> + </tr> + <tr> + <td>livy.spark.jars.packages</td> + <td>io.spray:spray-json_2.10:1.3.1</td> + <td>Adding extra libraries to livy interpreter</td> + </tr> + </table> + +<h2>How to use</h2> + +<p>Basically, you can use</p> + +<p><strong>spark</strong></p> +<div class="highlight"><pre><code class="text language-text" data-lang="text">%livy.spark +sc.version +</code></pre></div> +<p><strong>pyspark</strong></p> +<div class="highlight"><pre><code class="text language-text" data-lang="text">%livy.pyspark +print "1" +</code></pre></div> +<p><strong>sparkR</strong></p> +<div class="highlight"><pre><code class="text language-text" data-lang="text">%livy.sparkr +hello <- function( name ) { + sprintf( "Hello, %s", name ); +} + +hello("livy") +</code></pre></div> +<h2>Impersonation</h2> + +<p>When Zeppelin server is running with authentication enabled, +then this interpreter utilizes Livyâs user impersonation feature +i.e. sends extra parameter for creating and running a session ("proxyUser": "${loggedInUser}"). +This is particularly useful when multi users are sharing a Notebook server.</p> + +<h2>Apply Zeppelin Dynamic Forms</h2> + +<p>You can leverage <a href="../manual/dynamicform.html">Zeppelin Dynamic Form</a>. You can use both the <code>text input</code> and <code>select form</code> parameterization features.</p> +<div class="highlight"><pre><code class="text language-text" data-lang="text">%livy.pyspark +print "${group_by=product_id,product_id|product_name|customer_id|store_id}" +</code></pre></div> +<h2>FAQ</h2> + +<p>Livy debugging: If you see any of these in error console</p> + +<blockquote> +<p>Connect to livyhost:8998 [livyhost/127.0.0.1, livyhost/0:0:0:0:0:0:0:1] failed: Connection refused</p> +</blockquote> + +<p>Looks like the livy server is not up yet or the config is wrong</p> + +<blockquote> +<p>Exception: Session not found, Livy server would have restarted, or lost session.</p> +</blockquote> + +<p>The session would have timed out, you may need to restart the interpreter.</p> + +<blockquote> +<p>Blacklisted configuration values in session config: spark.master</p> +</blockquote> + +<p>Edit <code>conf/spark-blacklist.conf</code> file in livy server and comment out <code>#spark.master</code> line.</p> + +<p>If you choose to work on livy in <code>apps/spark/java</code> directory in <a href="https://github.com/cloudera/hue";>https://github.com/cloudera/hue</a>, +copy <code>spark-user-configurable-options.template</code> to <code>spark-user-configurable-options.conf</code> file in livy server and comment out <code>#spark.master</code>.</p> + + </div> +</div> + + + <hr> + <footer> + <!-- <p>© 2017 The Apache Software Foundation</p>--> + </footer> + </div> + + + + + <script type="text/javascript"> + (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){ + (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o), + m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m) + })(window,document,'script','//www.google-analytics.com/analytics.js','ga'); + + ga('create', 'UA-45176241-5', 'zeppelin.apache.org'); + ga('require', 'linkid', 'linkid.js'); + ga('send', 'pageview'); + +</script> + + + + </body> +</html> +
Added: zeppelin/site/docs/0.7.3/interpreter/mahout.html URL: http://svn.apache.org/viewvc/zeppelin/site/docs/0.7.3/interpreter/mahout.html?rev=1809223&view=auto ============================================================================== --- zeppelin/site/docs/0.7.3/interpreter/mahout.html (added) +++ zeppelin/site/docs/0.7.3/interpreter/mahout.html Thu Sep 21 20:33:57 2017 @@ -0,0 +1,431 @@ + +<!DOCTYPE html> +<html lang="en"> + <head> + <meta charset="utf-8"> + <title>Apache Zeppelin 0.7.3 Documentation: Mahout Interpreter for Apache Zeppelin</title> + <meta name="description" content="Apache Mahout provides a unified API (the R-Like Scala DSL) for quickly creating machine learning algorithms on a variety of engines."> + <meta name="author" content="The Apache Software Foundation"> + + <!-- Enable responsive viewport --> + <meta name="viewport" content="width=device-width, initial-scale=1.0"> + + <!-- Le HTML5 shim, for IE6-8 support of HTML elements --> + <!--[if lt IE 9]> + 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class="divider"></li> + <li class="title"><span><b>Contibute</b><span></li> + <li><a href="/docs/0.7.3/development/writingzeppelininterpreter.html">Writing Zeppelin Interpreter</a></li> + <li><a href="/docs/0.7.3/development/writingzeppelinvisualization.html">Writing Zeppelin Visualization (Experimental)</a></li> + <li><a href="/docs/0.7.3/development/writingzeppelinapplication.html">Writing Zeppelin Application (Experimental)</a></li> + <li><a href="/docs/0.7.3/development/howtocontribute.html">How to contribute (code)</a></li> + <li><a href="/docs/0.7.3/development/howtocontributewebsite.html">How to contribute (website)</a></li> + </ul> + </li> + <li> + <a href="/docs/0.7.3/search.html" class="nav-search-link"> + <span class="fa fa-search nav-search-icon"></span> + </a> + </li> + </ul> + </nav><!--/.navbar-collapse --> + </div> + </div> + + + + <div class="content"> + +<!--<div class="hero-unit Mahout Interpreter for Apache Zeppelin"> + <h1></h1> +</div> +--> + +<div class="row"> + <div class="col-md-12"> + <!-- +Licensed under the Apache License, Version 2.0 (the "License"); +you may not use this file except in compliance with the License. +You may obtain a copy of the License at + +http://www.apache.org/licenses/LICENSE-2.0 + +Unless required by applicable law or agreed to in writing, software +distributed under the License is distributed on an "AS IS" BASIS, +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +See the License for the specific language governing permissions and +limitations under the License. +--> + +<h1>Apache Mahout Interpreter for Apache Zeppelin</h1> + +<div id="toc"></div> + +<h2>Installation</h2> + +<p>Apache Mahout is a collection of packages that enable machine learning and matrix algebra on underlying engines such as Apache Flink or Apache Spark. A convenience script for creating and configuring two Mahout enabled interpreters exists. The <code>%sparkMahout</code> and <code>%flinkMahout</code> interpreters do not exist by default but can be easily created using this script. </p> + +<h3>Easy Installation</h3> + +<p>To quickly and easily get up and running using Apache Mahout, run the following command from the top-level directory of the Zeppelin install: +<code>bash +python scripts/mahout/add_mahout.py +</code></p> + +<p>This will create the <code>%sparkMahout</code> and <code>%flinkMahout</code> interpreters, and restart Zeppelin.</p> + +<h3>Advanced Installation</h3> + +<p>The <code>add_mahout.py</code> script contains several command line arguments for advanced users.</p> + +<table class="table-configuration"> + <tr> + <th>Argument</th> + <th>Description</th> + <th>Example</th> + </tr> + <tr> + <td>--zeppelin_home</td> + <td>This is the path to the Zeppelin installation. This flag is not needed if the script is run from the top-level installation directory or from the `zeppelin/scripts/mahout` directory.</td> + <td>/path/to/zeppelin</td> + </tr> + <tr> + <td>--mahout_home</td> + <td>If the user has already installed Mahout, this flag can set the path to `MAHOUT_HOME`. If this is set, downloading Mahout will be skipped.</td> + <td>/path/to/mahout_home</td> + </tr> + <tr> + <td>--restart_later</td> + <td>Restarting is necessary for updates to take effect. By default the script will restart Zeppelin for you- restart will be skipped if this flag is set.</td> + <td>NA</td> + </tr> + <tr> + <td>--force_download</td> + <td>This flag will force the script to re-download the binary even if it already exists. This is useful for previously failed downloads.</td> + <td>NA</td> + </tr> + <tr> + <td>--overwrite_existing</td> + <td>This flag will force the script to overwrite existing `%sparkMahout` and `%flinkMahout` interpreters. Useful when you want to just start over.</td> + <td>NA</td> + </tr> +</table> + +<p><strong>NOTE 1:</strong> Apache Mahout at this time only supports Spark 1.5 and Spark 1.6 and Scala 2.10. If the user is using another version of Spark (e.g. 2.0), the <code>%sparkMahout</code> will likely not work. The <code>%flinkMahout</code> interpreter will still work and the user is encouraged to develop with that engine as the code can be ported via copy and paste, as is evidenced by the tutorial notebook.</p> + +<p><strong>NOTE 2:</strong> If using Apache Flink in cluster mode, the following libraries will also need to be coppied to <code>${FLINK_HOME}/lib</code> +- mahout-math-0.12.2.jar +- mahout-math-scala<em>2.10-0.12.2.jar +- mahout-flink</em>2.10-0.12.2.jar +- mahout-hdfs-0.12.2.jar +- <a href="http://central.maven.org/maven2/com/google/guava/guava/14.0.1/guava-14.0.1.jar";>com.google.guava:guava:14.0.1</a></p> + +<h2>Overview</h2> + +<p>The <a href="http://mahout.apache.org/";>Apache Mahout</a>⢠project's goal is to build an environment for quickly creating scalable performant machine learning applications.</p> + +<p>Apache Mahout software provides three major features:</p> + +<ul> +<li>A simple and extensible programming environment and framework for building scalable algorithms</li> +<li>A wide variety of premade algorithms for Scala + Apache Spark, H2O, Apache Flink</li> +<li>Samsara, a vector math experimentation environment with R-like syntax which works at scale</li> +</ul> + +<p>In other words:</p> + +<p><em>Apache Mahout provides a unified API for quickly creating machine learning algorithms on a variety of engines.</em></p> + +<h2>How to use</h2> + +<p>When starting a session with Apache Mahout, depending on which engine you are using (Spark or Flink), a few imports must be made and a <em>Distributed Context</em> must be declared. Copy and paste the following code and run once to get started.</p> + +<h3>Flink</h3> +<div class="highlight"><pre><code class="scala language-scala" data-lang="scala"><span class="o">%</span><span class="n">flinkMahout</span> + +<span class="k">import</span> <span class="nn">org.apache.flink.api.scala._</span> +<span class="k">import</span> <span class="nn">org.apache.mahout.math.drm._</span> +<span class="k">import</span> <span class="nn">org.apache.mahout.math.drm.RLikeDrmOps._</span> +<span class="k">import</span> <span class="nn">org.apache.mahout.flinkbindings._</span> +<span class="k">import</span> <span class="nn">org.apache.mahout.math._</span> +<span class="k">import</span> <span class="nn">scalabindings._</span> +<span class="k">import</span> <span class="nn">RLikeOps._</span> + +<span class="k">implicit</span> <span class="k">val</span> <span class="n">ctx</span> <span class="k">=</span> <span class="k">new</span> <span class="nc">FlinkDistributedContext</span><span class="o">(</span><span class="n">benv</span><span class="o">)</span> +</code></pre></div> +<h3>Spark</h3> +<div class="highlight"><pre><code class="scala language-scala" data-lang="scala"><span class="o">%</span><span class="n">sparkMahout</span> + +<span class="k">import</span> <span class="nn">org.apache.mahout.math._</span> +<span class="k">import</span> <span class="nn">org.apache.mahout.math.scalabindings._</span> +<span class="k">import</span> <span class="nn">org.apache.mahout.math.drm._</span> +<span class="k">import</span> <span class="nn">org.apache.mahout.math.scalabindings.RLikeOps._</span> +<span class="k">import</span> <span class="nn">org.apache.mahout.math.drm.RLikeDrmOps._</span> +<span class="k">import</span> <span class="nn">org.apache.mahout.sparkbindings._</span> + +<span class="k">implicit</span> <span class="k">val</span> <span class="n">sdc</span><span class="k">:</span> <span class="kt">org.apache.mahout.sparkbindings.SparkDistributedContext</span> <span class="o">=</span> <span class="n">sc2sdc</span><span class="o">(</span><span class="n">sc</span><span class="o">)</span> +</code></pre></div> +<h3>Same Code, Different Engines</h3> + +<p>After importing and setting up the distributed context, the Mahout R-Like DSL is consistent across engines. The following code will run in both <code>%flinkMahout</code> and <code>%sparkMahout</code></p> +<div class="highlight"><pre><code class="scala language-scala" data-lang="scala"><span class="k">val</span> <span class="n">drmData</span> <span class="k">=</span> <span class="n">drmParallelize</span><span class="o">(</span><span class="n">dense</span><span class="o">(</span> + <span class="o">(</span><span class="mi">2</span><span class="o">,</span> <span class="mi">2</span><span class="o">,</span> <span class="mf">10.5</span><span class="o">,</span> <span class="mi">10</span><span class="o">,</span> <span class="mf">29.509541</span><span class="o">),</span> <span class="c1">// Apple Cinnamon Cheerios</span> + <span class="o">(</span><span class="mi">1</span><span class="o">,</span> <span class="mi">2</span><span class="o">,</span> <span class="mi">12</span><span class="o">,</span> <span class="mi">12</span><span class="o">,</span> <span class="mf">18.042851</span><span class="o">),</span> <span class="c1">// Cap'n'Crunch</span> + <span class="o">(</span><span class="mi">1</span><span class="o">,</span> <span class="mi">1</span><span class="o">,</span> <span class="mi">12</span><span class="o">,</span> <span class="mi">13</span><span class="o">,</span> <span class="mf">22.736446</span><span class="o">),</span> <span class="c1">// Cocoa Puffs</span> + <span class="o">(</span><span class="mi">2</span><span class="o">,</span> <span class="mi">1</span><span class="o">,</span> <span class="mi">11</span><span class="o">,</span> <span class="mi">13</span><span class="o">,</span> <span class="mf">32.207582</span><span class="o">),</span> <span class="c1">// Froot Loops</span> + <span class="o">(</span><span class="mi">1</span><span class="o">,</span> <span class="mi">2</span><span class="o">,</span> <span class="mi">12</span><span class="o">,</span> <span class="mi">11</span><span class="o">,</span> <span class="mf">21.871292</span><span class="o">),</span> <span class="c1">// Honey Graham Ohs</span> + <span class="o">(</span><span class="mi">2</span><span class="o">,</span> <span class="mi">1</span><span class="o">,</span> <span class="mi">16</span><span class="o">,</span> <span class="mi">8</span><span class="o">,</span> <span class="mf">36.187559</span><span class="o">),</span> <span class="c1">// Wheaties Honey Gold</span> + <span class="o">(</span><span class="mi">6</span><span class="o">,</span> <span class="mi">2</span><span class="o">,</span> <span class="mi">17</span><span class="o">,</span> <span class="mi">1</span><span class="o">,</span> <span class="mf">50.764999</span><span class="o">),</span> <span class="c1">// Cheerios</span> + <span class="o">(</span><span class="mi">3</span><span class="o">,</span> <span class="mi">2</span><span class="o">,</span> <span class="mi">13</span><span class="o">,</span> <span class="mi">7</span><span class="o">,</span> <span class="mf">40.400208</span><span class="o">),</span> <span class="c1">// Clusters</span> + <span class="o">(</span><span class="mi">3</span><span class="o">,</span> <span class="mi">3</span><span class="o">,</span> <span class="mi">13</span><span class="o">,</span> <span class="mi">4</span><span class="o">,</span> <span class="mf">45.811716</span><span class="o">)),</span> <span class="n">numPartitions</span> <span class="k">=</span> <span class="mi">2</span><span class="o">)</span> + +<span class="n">drmData</span><span class="o">.</span><span class="n">collect</span><span class="o">(::,</span> <span class="mi">0</span> <span class="n">until</span> <span class="mi">4</span><span class="o">)</span> + +<span class="k">val</span> <span class="n">drmX</span> <span class="k">=</span> <span class="n">drmData</span><span class="o">(::,</span> <span class="mi">0</span> <span class="n">until</span> <span class="mi">4</span><span class="o">)</span> +<span class="k">val</span> <span class="n">y</span> <span class="k">=</span> <span class="n">drmData</span><span class="o">.</span><span class="n">collect</span><span class="o">(::,</span> <span class="mi">4</span><span class="o">)</span> +<span class="k">val</span> <span class="n">drmXtX</span> <span class="k">=</span> <span class="n">drmX</span><span class="o">.</span><span class="n">t</span> <span class="o">%*%</span> <span class="n">drmX</span> +<span class="k">val</span> <span class="n">drmXty</span> <span class="k">=</span> <span class="n">drmX</span><span class="o">.</span><span class="n">t</span> <span class="o">%*%</span> <span class="n">y</span> + + +<span class="k">val</span> <span class="nc">XtX</span> <span class="k">=</span> <span class="n">drmXtX</span><span class="o">.</span><span class="n">collect</span> +<span class="k">val</span> <span class="nc">Xty</span> <span class="k">=</span> <span class="n">drmXty</span><span class="o">.</span><span class="n">collect</span><span class="o">(::,</span> <span class="mi">0</span><span class="o">)</span> +<span class="k">val</span> <span class="n">beta</span> <span class="k">=</span> <span class="n">solve</span><span class="o">(</span><span class="nc">XtX</span><span class="o">,</span> <span class="nc">Xty</span><span class="o">)</span> +</code></pre></div> +<h2>Leveraging Resource Pools and R for Visualization</h2> + +<p>Resource Pools are a powerful Zeppelin feature that lets us share information between interpreters. A fun trick is to take the output of our work in Mahout and analyze it in other languages.</p> + +<h3>Setting up a Resource Pool in Flink</h3> + +<p>In Spark based interpreters resource pools are accessed via the ZeppelinContext API. To put and get things from the resource pool one can be done simple +<code>scala +val myVal = 1 +z.put("foo", myVal) +val myFetchedVal = z.get("foo") +</code></p> + +<p>To add this functionality to a Flink based interpreter we declare the follwoing</p> +<div class="highlight"><pre><code class="scala language-scala" data-lang="scala"><span class="o">%</span><span class="n">flinkMahout</span> + +<span class="k">import</span> <span class="nn">org.apache.zeppelin.interpreter.InterpreterContext</span> + +<span class="k">val</span> <span class="n">z</span> <span class="k">=</span> <span class="nc">InterpreterContext</span><span class="o">.</span><span class="n">get</span><span class="o">().</span><span class="n">getResourcePool</span><span class="o">()</span> +</code></pre></div> +<p>Now we can access the resource pool in a consistent manner from the <code>%flinkMahout</code> interpreter.</p> + +<h3>Passing a variable from Mahout to R and Plotting</h3> + +<p>In this simple example, we use Mahout (on Flink or Spark, the code is the same) to create a random matrix and then take the Sin of each element. We then randomly sample the matrix and create a tab separated string. Finally we pass that string to R where it is read as a .tsv file, and a DataFrame is created and plotted using native R plotting libraries.</p> +<div class="highlight"><pre><code class="scala language-scala" data-lang="scala"><span class="k">val</span> <span class="n">mxRnd</span> <span class="k">=</span> <span class="nc">Matrices</span><span class="o">.</span><span class="n">symmetricUniformView</span><span class="o">(</span><span class="mi">5000</span><span class="o">,</span> <span class="mi">2</span><span class="o">,</span> <span class="mi">1234</span><span class="o">)</span> +<span class="k">val</span> <span class="n">drmRand</span> <span class="k">=</span> <span class="n">drmParallelize</span><span class="o">(</span><span class="n">mxRnd</span><span class="o">)</span> + + +<span class="k">val</span> <span class="n">drmSin</span> <span class="k">=</span> <span class="n">drmRand</span><span class="o">.</span><span class="n">mapBlock</span><span class="o">()</span> <span class="o">{</span><span class="k">case</span> <span class="o">(</span><span class="n">keys</span><span class="o">,</span> <span class="n">block</span><span class="o">)</span> <span class="k">=></span> + <span class="k">val</span> <span class="n">blockB</span> <span class="k">=</span> <span class="n">block</span><span class="o">.</span><span class="n">like</span><span class="o">()</span> + <span class="k">for</span> <span class="o">(</span><span class="n">i</span> <span class="k"><-</span> <span class="mi">0</span> <span class="n">until</span> <span class="n">block</span><span class="o">.</span><span class="n">nrow</span><span class="o">)</span> <span class="o">{</span> + <span class="n">blockB</span><span class="o">(</span><span class="n">i</span><span class="o">,</span> <span class="mi">0</span><span class="o">)</span> <span class="k">=</span> <span class="n">block</span><span class="o">(</span><span class="n">i</span><span class="o">,</span> <span class="mi">0</span><span class="o">)</span> + <span class="n">blockB</span><span class="o">(</span><span class="n">i</span><span class="o">,</span> <span class="mi">1</span><span class="o">)</span> <span class="k">=</span> <span class="nc">Math</span><span class="o">.</span><span class="n">sin</span><span class="o">((</span><span class="n">block</span><span class="o">(</span><span class="n">i</span><span class="o">,</span> <span class="mi">0</span><span class="o">)</span> <span class="o">*</span> <span class="mi">8</span><span class="o">))</span> + <span class="o">}</span> + <span class="n">keys</span> <span class="o">-></span> <span class="n">blockB</span> +<span class="o">}</span> + +<span class="n">z</span><span class="o">.</span><span class="n">put</span><span class="o">(</span><span class="s">"sinDrm"</span><span class="o">,</span> <span class="n">org</span><span class="o">.</span><span class="n">apache</span><span class="o">.</span><span class="n">mahout</span><span class="o">.</span><span class="n">math</span><span class="o">.</span><span class="n">drm</span><span class="o">.</span><span class="n">drmSampleToTSV</span><span class="o">(</span><span class="n">drmSin</span><span class="o">,</span> <span class="mf">0.85</span><span class="o">))</span> +</code></pre></div> +<p>And then in an R paragraph...</p> +<div class="highlight"><pre><code class="r language-r" data-lang="r">%spark.r <span class="p">{</span><span class="s">"imageWidth"</span><span class="o">:</span> <span class="s">"400px"</span><span class="p">}</span> + +library<span class="p">(</span><span class="s">"ggplot2"</span><span class="p">)</span> + +sinStr <span class="o">=</span> z.get<span class="p">(</span><span class="s">"flinkSinDrm"</span><span class="p">)</span> + +data <span class="o"><-</span> read.table<span class="p">(</span>text<span class="o">=</span> sinStr<span class="p">,</span> sep<span class="o">=</span><span class="s">"\t"</span><span class="p">,</span> header<span class="o">=</span><span class="kc">FALSE</span><span class="p">)</span> + +plot<span class="p">(</span>data<span class="p">,</span> col<span class="o">=</span><span class="s">"red"</span><span class="p">)</span> +</code></pre></div> + </div> +</div> + + + <hr> + <footer> + <!-- <p>© 2017 The Apache Software Foundation</p>--> + </footer> + </div> + + + + + <script type="text/javascript"> + (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){ + (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o), + m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m) + })(window,document,'script','//www.google-analytics.com/analytics.js','ga'); 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+ <a href="/docs/0.7.3/search.html" class="nav-search-link"> + <span class="fa fa-search nav-search-icon"></span> + </a> + </li> + </ul> + </nav><!--/.navbar-collapse --> + </div> + </div> + + + + <div class="content"> + +<!--<div class="hero-unit Markdown Interpreter for Apache Zeppelin"> + <h1></h1> +</div> +--> + +<div class="row"> + <div class="col-md-12"> + <!-- +Licensed under the Apache License, Version 2.0 (the "License"); +you may not use this file except in compliance with the License. +You may obtain a copy of the License at + +http://www.apache.org/licenses/LICENSE-2.0 + +Unless required by applicable law or agreed to in writing, software +distributed under the License is distributed on an "AS IS" BASIS, +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +See the License for the specific language governing permissions and +limitations under the License. +--> + +<h1>Markdown Interpreter for Apache Zeppelin</h1> + +<div id="toc"></div> + +<h2>Overview</h2> + +<p><a href="http://daringfireball.net/projects/markdown/";>Markdown</a> is a plain text formatting syntax designed so that it can be converted to HTML. +Apache Zeppelin uses <a href="https://github.com/sirthias/pegdown";>pegdown</a> and <a href="https://github.com/jdcasey/markdown4j";>markdown4j</a> as markdown parsers.</p> + +<p>In Zeppelin notebook, you can use <code>%md</code> in the beginning of a paragraph to invoke the Markdown interpreter and generate static html from Markdown plain text.</p> + +<p>In Zeppelin, Markdown interpreter is enabled by default and uses the <a href="https://github.com/sirthias/pegdown";>pegdown</a> parser.</p> + +<p><img src="../assets/themes/zeppelin/img/docs-img/markdown-interpreter-setting.png" width="60%" /></p> + +<h2>Example</h2> + +<p>The following example demonstrates the basic usage of Markdown in a Zeppelin notebook.</p> + +<p><img src="../assets/themes/zeppelin/img/docs-img/markdown-example.png" width="70%" /></p> + +<h2>Mathematical expression</h2> + +<p>Markdown interpreter leverages %html display system internally. That means you can mix mathematical expressions with markdown syntax. For more information, please see <a href="../displaysystem/basicdisplaysystem.html#mathematical-expressions">Mathematical Expression</a> section.</p> + +<h2>Configuration</h2> + +<table class="table-configuration"> + <tr> + <th>Name</th> + <th>Default Value</th> + <th>Description</th> + </tr> + <tr> + <td>markdown.parser.type</td> + <td>pegdown</td> + <td>Markdown Parser Type. <br/> Available values: pegdown, markdown4j.</td> + </tr> +</table> + +<h3>Pegdown Parser</h3> + +<p><code>pegdown</code> parser provides github flavored markdown.</p> + +<p><img src="../assets/themes/zeppelin/img/docs-img/markdown-example-pegdown-parser.png" width="70%" /></p> + +<p><code>pegdown</code> parser provides <a href="http://yuml.me/";>YUML</a> and <a href="https://www.websequencediagrams.com/";>Websequence</a> plugins also. </p> + +<p><img src="../assets/themes/zeppelin/img/docs-img/markdown-example-pegdown-parser-plugins.png" width="70%" /></p> + +<h3>Markdown4j Parser</h3> + +<p>Since pegdown parser is more accurate and provides much more markdown syntax<br> +<code>markdown4j</code> option might be removed later. But keep this parser for the backward compatibility.</p> + + </div> +</div> + + + <hr> + <footer> + <!-- <p>© 2017 The Apache Software Foundation</p>--> + </footer> + </div> + + + + + <script type="text/javascript"> + (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){ + (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o), + m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m) + })(window,document,'script','//www.google-analytics.com/analytics.js','ga'); + + ga('create', 'UA-45176241-5', 'zeppelin.apache.org'); + ga('require', 'linkid', 'linkid.js'); + ga('send', 'pageview'); + +</script> + + + + </body> +</html> +
