| <!DOCTYPE html> |
| <html lang="en"> |
| <head> |
| <meta charset="utf-8"> |
| <meta http-equiv="X-UA-Compatible" content="IE=edge"> |
| <meta name="viewport" content="width=device-width, initial-scale=1"> |
| <!-- The above 3 meta tags *must* come first in the head; any other head content must come *after* these tags --> |
| <title>Apache Flink: February 2015 in the Flink community</title> |
| <link rel="shortcut icon" href="/favicon.ico" type="image/x-icon"> |
| <link rel="icon" href="/favicon.ico" type="image/x-icon"> |
| |
| <!-- Bootstrap --> |
| <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.4/css/bootstrap.min.css"> |
| <link rel="stylesheet" href="/css/flink.css"> |
| <link rel="stylesheet" href="/css/syntax.css"> |
| |
| <!-- Blog RSS feed --> |
| <link href="/blog/feed.xml" rel="alternate" type="application/rss+xml" title="Apache Flink Blog: RSS feed" /> |
| |
| <!-- HTML5 shim and Respond.js for IE8 support of HTML5 elements and media queries --> |
| <!-- WARNING: Respond.js doesn't work if you view the page via file:// --> |
| <!--[if lt IE 9]> |
| <script src="https://oss.maxcdn.com/html5shiv/3.7.2/html5shiv.min.js"></script> |
| <script src="https://oss.maxcdn.com/respond/1.4.2/respond.min.js"></script> |
| <![endif]--> |
| </head> |
| <body> |
| |
| |
| <!-- Top navbar. --> |
| <nav class="navbar navbar-default navbar-fixed-top"> |
| <div class="container"> |
| <!-- The logo. --> |
| <div class="navbar-header"> |
| <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1"> |
| <span class="icon-bar"></span> |
| <span class="icon-bar"></span> |
| <span class="icon-bar"></span> |
| </button> |
| <div class="navbar-logo"> |
| <a href="/"><img alt="Apache Flink" src="/img/navbar-brand-logo.jpg" width="78px" height="40px"></a> |
| </div> |
| </div><!-- /.navbar-header --> |
| |
| <!-- The navigation links. --> |
| <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1"> |
| <ul class="nav navbar-nav"> |
| <!-- Overview --> |
| <li><a href="/index.html">Overview</a></li> |
| |
| <!-- Quickstart --> |
| <li class="dropdown"> |
| <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-expanded="false">Quickstart <span class="caret"></span></a> |
| <ul class="dropdown-menu" role="menu"> |
| <li><a href="http://ci.apache.org/projects/flink/flink-docs-release-0.9/quickstart/setup_quickstart.html">Setup</a></li> |
| <li><a href="http://ci.apache.org/projects/flink/flink-docs-release-0.9/quickstart/java_api_quickstart.html">Java API</a></li> |
| <li><a href="http://ci.apache.org/projects/flink/flink-docs-release-0.9/quickstart/scala_api_quickstart.html">Scala API</a></li> |
| <li><a href="http://ci.apache.org/projects/flink/flink-docs-release-0.9/quickstart/run_example_quickstart.html">Run Step-by-Step Example</a></li> |
| </ul> |
| </li> |
| |
| <!-- Features --> |
| <li><a href="/features.html">Features</a></li> |
| |
| <!-- Downloads --> |
| <li><a href="/downloads.html">Downloads</a></li> |
| |
| <!-- Documentation --> |
| <li class="dropdown"> |
| <a href="" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-expanded="false">Documentation <span class="caret"></span></a> |
| <ul class="dropdown-menu" role="menu"> |
| <!-- Latest stable release --> |
| <li role="presentation" class="dropdown-header"><strong>Latest Release</strong> (Stable)</li> |
| <li><a href="http://ci.apache.org/projects/flink/flink-docs-release-0.9">0.9.0 Documentation</a></li> |
| <li><a href="http://ci.apache.org/projects/flink/flink-docs-release-0.9/api/java" class="active">0.9.0 Javadocs</a></li> |
| <li><a href="http://ci.apache.org/projects/flink/flink-docs-release-0.9/api/scala/index.html" class="active">0.9.0 ScalaDocs</a></li> |
| |
| <!-- Snapshot docs --> |
| <li class="divider"></li> |
| <li role="presentation" class="dropdown-header"><strong>Snapshot</strong> (Development)</li> |
| <li><a href="http://ci.apache.org/projects/flink/flink-docs-master">0.10 Documentation</a></li> |
| <li><a href="http://ci.apache.org/projects/flink/flink-docs-master/api/java" class="active">0.10 Javadocs</a></li> |
| <li><a href="http://ci.apache.org/projects/flink/flink-docs-master/api/scala/index.html" class="active">0.10 ScalaDocs</a></li> |
| |
| <!-- Wiki --> |
| <li class="divider"></li> |
| <li><a href="https://cwiki.apache.org/confluence/display/FLINK/Apache+Flink+Home"><small><span class="glyphicon glyphicon-new-window"></span></small> Wiki</a></li> |
| </ul> |
| </li> |
| |
| <!-- FAQ --> |
| <li><a href="/faq.html">FAQ</a></li> |
| </ul> |
| |
| <ul class="nav navbar-nav navbar-right"> |
| <!-- Blog --> |
| <li class=" active hidden-md hidden-sm"><a href="/blog/">Blog</a></li> |
| |
| <li class="dropdown hidden-md hidden-sm"> |
| <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-expanded="false">Community <span class="caret"></span></a> |
| <ul class="dropdown-menu" role="menu"> |
| <!-- Community --> |
| <li role="presentation" class="dropdown-header"><strong>Community</strong></li> |
| <li><a href="/community.html#mailing-lists">Mailing Lists</a></li> |
| <li><a href="/community.html#irc">IRC</a></li> |
| <li><a href="/community.html#stack-overflow">Stack Overflow</a></li> |
| <li><a href="/community.html#issue-tracker">Issue Tracker</a></li> |
| <li><a href="/community.html#source-code">Source Code</a></li> |
| <li><a href="/community.html#people">People</a></li> |
| |
| <!-- Contribute --> |
| <li class="divider"></li> |
| <li role="presentation" class="dropdown-header"><strong>Contribute</strong></li> |
| <li><a href="/how-to-contribute.html">How to Contribute</a></li> |
| <li><a href="/coding-guidelines.html">Coding Guidelines</a></li> |
| </ul> |
| </li> |
| |
| <li class="dropdown hidden-md hidden-sm"> |
| <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-expanded="false">Project <span class="caret"></span></a> |
| <ul class="dropdown-menu" role="menu"> |
| <!-- Project --> |
| <li role="presentation" class="dropdown-header"><strong>Project</strong></li> |
| <li><a href="/material.html">Material</a></li> |
| <li><a href="https://twitter.com/apacheflink"><small><span class="glyphicon glyphicon-new-window"></span></small> Twitter</a></li> |
| <li><a href="https://github.com/apache/flink"><small><span class="glyphicon glyphicon-new-window"></span></small> GitHub</a></li> |
| <li><a href="https://cwiki.apache.org/confluence/display/FLINK/Apache+Flink+Home"><small><span class="glyphicon glyphicon-new-window"></span></small> Wiki</a></li> |
| </ul> |
| </li> |
| </ul> |
| </div><!-- /.navbar-collapse --> |
| </div><!-- /.container --> |
| </nav> |
| |
| |
| <!-- Main content. --> |
| <div class="container"> |
| |
| |
| <div class="row"> |
| <div class="col-sm-8 col-sm-offset-2"> |
| <div class="row"> |
| <h1>February 2015 in the Flink community</h1> |
| |
| <article> |
| <p>02 Mar 2015</p> |
| |
| <p>February might be the shortest month of the year, but this does not |
| mean that the Flink community has not been busy adding features to the |
| system and fixing bugs. Here’s a rundown of the activity in the Flink |
| community last month.</p> |
| |
| <h3 id="release">0.8.1 release</h3> |
| |
| <p>Flink 0.8.1 was released. This bugfixing release resolves a total of 22 issues.</p> |
| |
| <h3 id="new-committer">New committer</h3> |
| |
| <p><a href="https://github.com/mxm">Max Michels</a> has been voted a committer by the Flink PMC.</p> |
| |
| <h3 id="flink-adapter-for-apache-samoa">Flink adapter for Apache SAMOA</h3> |
| |
| <p><a href="http://samoa.incubator.apache.org">Apache SAMOA (incubating)</a> is a |
| distributed streaming machine learning (ML) framework with a |
| programming abstraction for distributed streaming ML algorithms. SAMOA |
| runs on a variety of backend engines, currently Apache Storm and |
| Apache S4. A <a href="https://github.com/apache/incubator-samoa/pull/11">pull |
| request</a> is |
| available at the SAMOA repository that adds a Flink adapter for SAMOA.</p> |
| |
| <h3 id="easy-flink-deployment-on-google-compute-cloud">Easy Flink deployment on Google Compute Cloud</h3> |
| |
| <p>Flink is now integrated in bdutil, Google’s open source tool for |
| creating and configuring (Hadoop) clusters in Google Compute |
| Engine. Deployment of Flink clusters in now supported starting with |
| <a href="https://groups.google.com/forum/#!topic/gcp-hadoop-announce/uVJ_6y9cGKM">bdutil |
| 1.2.0</a>.</p> |
| |
| <h3 id="flink-on-the-web">Flink on the Web</h3> |
| |
| <p>A new blog post on <a href="http://flink.apache.org/news/2015/02/09/streaming-example.html">Flink |
| Streaming</a> |
| was published at the blog. Flink was mentioned in several articles on |
| the web. Here are some examples:</p> |
| |
| <ul> |
| <li> |
| <p><a href="http://dataconomy.com/how-flink-became-an-apache-top-level-project/">How Flink became an Apache Top-Level Project</a></p> |
| </li> |
| <li> |
| <p><a href="https://www.linkedin.com/pulse/stale-synchronous-parallelism-new-frontier-apache-flink-nam-luc-tran?utm_content=buffer461af&utm_medium=social&utm_source=linkedin.com&utm_campaign=buffer">Stale Synchronous Parallelism: The new frontier for Apache Flink?</a></p> |
| </li> |
| <li> |
| <p><a href="http://www.hadoopsphere.com/2015/02/distributed-data-processing-with-apache.html">Distributed data processing with Apache Flink</a></p> |
| </li> |
| <li> |
| <p><a href="http://www.hadoopsphere.com/2015/02/ciao-latency-hallo-speed.html">Ciao latency, hello speed</a></p> |
| </li> |
| </ul> |
| |
| <h2 id="in-the-flink-master">In the Flink master</h2> |
| |
| <p>The following features have been now merged in Flink’s master repository.</p> |
| |
| <h3 id="gelly">Gelly</h3> |
| |
| <p>Gelly, Flink’s Graph API allows users to manipulate graph-shaped data |
| directly. Here’s for example a calculation of shortest paths in a |
| graph:</p> |
| |
| <div class="highlight"><pre><code class="language-java" data-lang="java"><span class="n">Graph</span><span class="o"><</span><span class="n">Long</span><span class="o">,</span> <span class="n">Double</span><span class="o">,</span> <span class="n">Double</span><span class="o">></span> <span class="n">graph</span> <span class="o">=</span> <span class="n">Graph</span><span class="o">.</span><span class="na">fromDataSet</span><span class="o">(</span><span class="n">vertices</span><span class="o">,</span> <span class="n">edges</span><span class="o">,</span> <span class="n">env</span><span class="o">);</span> |
| |
| <span class="n">DataSet</span><span class="o"><</span><span class="n">Vertex</span><span class="o"><</span><span class="n">Long</span><span class="o">,</span> <span class="n">Double</span><span class="o">>></span> <span class="n">singleSourceShortestPaths</span> <span class="o">=</span> <span class="n">graph</span> |
| <span class="o">.</span><span class="na">run</span><span class="o">(</span><span class="k">new</span> <span class="n">SingleSourceShortestPaths</span><span class="o"><</span><span class="n">Long</span><span class="o">>(</span><span class="n">srcVertexId</span><span class="o">,</span> |
| <span class="n">maxIterations</span><span class="o">)).</span><span class="na">getVertices</span><span class="o">();</span></code></pre></div> |
| |
| <p>See more Gelly examples |
| <a href="https://github.com/apache/flink/tree/master/flink-staging/flink-gelly/src/main/java/org/apache/flink/graph/example">here</a>.</p> |
| |
| <h3 id="flink-expressions">Flink Expressions</h3> |
| |
| <p>The newly merged |
| <a href="https://github.com/apache/flink/tree/master/flink-staging/flink-table">flink-table</a> |
| module is the first step in Flink’s roadmap towards logical queries |
| and SQL support. Here’s a preview on how you can read two CSV file, |
| assign a logical schema to, and apply transformations like filters and |
| joins using logical attributes rather than physical data types.</p> |
| |
| <div class="highlight"><pre><code class="language-scala" data-lang="scala"><span class="k">val</span> <span class="n">customers</span> <span class="k">=</span> <span class="n">getCustomerDataSet</span><span class="o">(</span><span class="n">env</span><span class="o">)</span> |
| <span class="o">.</span><span class="n">as</span><span class="o">(</span><span class="-Symbol">'id</span><span class="o">,</span> <span class="-Symbol">'mktSegment</span><span class="o">)</span> |
| <span class="o">.</span><span class="n">filter</span><span class="o">(</span> <span class="-Symbol">'mktSegment</span> <span class="o">===</span> <span class="s">"AUTOMOBILE"</span> <span class="o">)</span> |
| |
| <span class="k">val</span> <span class="n">orders</span> <span class="k">=</span> <span class="n">getOrdersDataSet</span><span class="o">(</span><span class="n">env</span><span class="o">)</span> |
| <span class="o">.</span><span class="n">filter</span><span class="o">(</span> <span class="n">o</span> <span class="k">=></span> <span class="n">dateFormat</span><span class="o">.</span><span class="n">parse</span><span class="o">(</span><span class="n">o</span><span class="o">.</span><span class="n">orderDate</span><span class="o">).</span><span class="n">before</span><span class="o">(</span><span class="n">date</span><span class="o">)</span> <span class="o">)</span> |
| <span class="o">.</span><span class="n">as</span><span class="o">(</span><span class="-Symbol">'orderId</span><span class="o">,</span> <span class="-Symbol">'custId</span><span class="o">,</span> <span class="-Symbol">'orderDate</span><span class="o">,</span> <span class="-Symbol">'shipPrio</span><span class="o">)</span> |
| |
| <span class="k">val</span> <span class="n">items</span> <span class="k">=</span> |
| <span class="n">orders</span><span class="o">.</span><span class="n">join</span><span class="o">(</span><span class="n">customers</span><span class="o">)</span> |
| <span class="o">.</span><span class="n">where</span><span class="o">(</span><span class="-Symbol">'custId</span> <span class="o">===</span> <span class="-Symbol">'id</span><span class="o">)</span> |
| <span class="o">.</span><span class="n">select</span><span class="o">(</span><span class="-Symbol">'orderId</span><span class="o">,</span> <span class="-Symbol">'orderDate</span><span class="o">,</span> <span class="-Symbol">'shipPrio</span><span class="o">)</span></code></pre></div> |
| |
| <h3 id="access-to-hcatalog-tables">Access to HCatalog tables</h3> |
| |
| <p>With the <a href="https://github.com/apache/flink/tree/master/flink-staging/flink-hcatalog">flink-hcatalog |
| module</a>, |
| you can now conveniently access HCatalog/Hive tables. The module |
| supports projection (selection and order of fields) and partition |
| filters.</p> |
| |
| <h3 id="access-to-secured-yarn-clustershdfs">Access to secured YARN clusters/HDFS.</h3> |
| |
| <p>With this change users can access Kerberos secured YARN (and HDFS) |
| Hadoop clusters. Also, basic support for accessing secured HDFS with |
| a standalone Flink setup is now available.</p> |
| |
| |
| </article> |
| </div> |
| |
| <div class="row"> |
| <div id="disqus_thread"></div> |
| <script type="text/javascript"> |
| /* * * CONFIGURATION VARIABLES: EDIT BEFORE PASTING INTO YOUR WEBPAGE * * */ |
| var disqus_shortname = 'stratosphere-eu'; // required: replace example with your forum shortname |
| |
| /* * * DON'T EDIT BELOW THIS LINE * * */ |
| (function() { |
| var dsq = document.createElement('script'); dsq.type = 'text/javascript'; dsq.async = true; |
| dsq.src = '//' + disqus_shortname + '.disqus.com/embed.js'; |
| (document.getElementsByTagName('head')[0] || document.getElementsByTagName('body')[0]).appendChild(dsq); |
| })(); |
| </script> |
| </div> |
| </div> |
| </div> |
| |
| <hr /> |
| <div class="footer text-center"> |
| <p>Copyright © 2014-2015 <a href="http://apache.org">The Apache Software Foundation</a>. All Rights Reserved.</p> |
| <p>Apache Flink, Apache, and the Apache feather logo are trademarks of The Apache Software Foundation.</p> |
| <p><a href="/privacy-policy.html">Privacy Policy</a> · <a href="/blog/feed.xml">RSS feed</a></p> |
| </div> |
| |
| </div><!-- /.container --> |
| |
| <!-- jQuery (necessary for Bootstrap's JavaScript plugins) --> |
| <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.2/jquery.min.js"></script> |
| <!-- Include all compiled plugins (below), or include individual files as needed --> |
| <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.4/js/bootstrap.min.js"></script> |
| <script src="/js/codetabs.js"></script> |
| |
| <!-- Google Analytics --> |
| <script> |
| (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-52545728-1', 'auto'); |
| ga('send', 'pageview'); |
| </script> |
| </body> |
| </html> |