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| <h1>Apache Livy</h1> |
| <p>A REST Service for Apache Spark</p> |
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| <a href="download" class="btn btn-primary btn-lg bigFingerButton" role="button">Get Livy 0.8.0-incubating</a></p> |
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| <h4 id="submit-jobs-from-anywhere"><em>Submit Jobs from Anywhere</em></h4> |
| <blockquote> |
| <p>Livy enables programmatic, fault-tolerant, multi-tenant submission of Spark jobs from web/mobile apps (no Spark |
| client needed). So, multiple users can interact with your Spark cluster concurrently and reliably.</p> |
| </blockquote> |
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| <h4 id="use-interactive-scala-or-python"><em>Use Interactive Scala or Python</em></h4> |
| <blockquote> |
| <p>Livy speaks either Scala or Python, so clients can communicate with your Spark cluster via either language remotely. |
| Also, batch job submissions can be done in Scala, Java, or Python.</p> |
| </blockquote> |
| |
| <h4 id="no-code-changes-needed"><em>No Code Changes Needed</em></h4> |
| <blockquote> |
| <p>Don’t worry, no changes to existing programs are needed to use Livy. Just build Livy with Maven, deploy the |
| configuration file to your Spark cluster, and you’re off! Check out <a href="/get-started">Get Started</a> to |
| get going.</p> |
| </blockquote> |
| |
| <h3 id="what-is-apache-livy">What is Apache Livy?</h3> |
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| <p>Apache Livy is a service that enables easy interaction with a Spark cluster over a REST interface. It enables easy |
| submission of Spark jobs or snippets of Spark code, synchronous or asynchronous result retrieval, as well as Spark |
| Context management, all via a simple REST interface or an RPC client library. Apache Livy also simplifies the |
| interaction between Spark and application servers, thus enabling the use of Spark for interactive web/mobile |
| applications. Additional features include:</p> |
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| <ul> |
| <li>Have long running Spark Contexts that can be used for multiple Spark jobs, by multiple clients</li> |
| <li>Share cached RDDs or Dataframes across multiple jobs and clients</li> |
| <li>Multiple Spark Contexts can be managed simultaneously, and the Spark Contexts run on the cluster (YARN/Mesos) instead |
| of the Livy Server, for good fault tolerance and concurrency</li> |
| <li>Jobs can be submitted as precompiled jars, snippets of code or via java/scala client API</li> |
| <li>Ensure security via secure authenticated communication</li> |
| </ul> |
| |
| <p>To learn more, <a href="https://youtu.be/C_3iEf_KNv8">watch this tech session video</a> from Spark Summit West 2016.</p> |
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| <p><img src="/assets/images/livy-architecture.png" alt="Architecture" style="width: 90%; display: block; margin: 0 auto;" /></p> |
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| Apache Livy is an effort undergoing <a href="https://incubator.apache.org/index.html">Incubation</a> |
| at The Apache Software Foundation (ASF), sponsored by the Incubator. Incubation is required of all newly |
| accepted projects until a further review indicates that the infrastructure, communications, and decision |
| making process have stabilized in a manner consistent with other successful ASF projects. While incubation |
| status is not necessarily a reflection of the completeness or stability of the code, it does indicate that |
| the project has yet to be fully endorsed by the ASF. |
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