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Posted to commits@mahout.apache.org by bu...@apache.org on 2016/04/08 20:40:40 UTC
svn commit: r985116 - in /websites/staging/mahout/trunk/content: ./
users/flinkbindings/ users/flinkbindings/flink-internals.html
Author: buildbot
Date: Fri Apr 8 18:40:40 2016
New Revision: 985116
Log:
Staging update by buildbot for mahout
Added:
websites/staging/mahout/trunk/content/users/flinkbindings/
websites/staging/mahout/trunk/content/users/flinkbindings/flink-internals.html
Modified:
websites/staging/mahout/trunk/content/ (props changed)
Propchange: websites/staging/mahout/trunk/content/
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+<h1 id="introduction">Introduction<a class="headerlink" href="#introduction" title="Permanent link">¶</a></h1>
+<p>This document provides an overview of how the Mahout Samsara environment is implemented over the Apache Flink backend engine. This document gives an overview of the code layout for the Flink backend engine, the source code for which can be found under /flink directory in the Mahout codebase.</p>
+<p>Apache Flink is a distributed big data streaming engine that supports both Streaming and Batch interfaces. Batch processing is an extension of Flinkâs Stream processing engine.</p>
+<p>The Mahout Flink integration presently supports Flinkâs batch processing capabilities leveraging the DataSet API.</p>
+<p>The Mahout DRM, or Distributed Row Matrix, is an abstraction for storing a large matrix of numbers in-memory in a cluster by distributing logical rows among servers. Mahout's scala DSL provides an abstract API on DRMs for backend engines to provide implementations of this API. An example is the Spark backend engine. Each engine has it's own design of mapping the abstract API onto its data model and provides implementations for algebraic operators over that mapping.</p>
+<h1 id="flink-environment-engine">Flink Environment Engine<a class="headerlink" href="#flink-environment-engine" title="Permanent link">¶</a></h1>
+<p>The Flink backend implements the abstract DRM as a Flink DataSet. A Flink job runs in the context of an ExecutionEnvironment (from the Flink Batch processing API).</p>
+<h1 id="source-layout">Source Layout<a class="headerlink" href="#source-layout" title="Permanent link">¶</a></h1>
+<p>Within mahout.git, the top level directory, flink/ holds all the source code for the Flink backend engine. Sections of code that interface with the rest of the Mahout components are in Scala, and sections of the code that interface with Flink DataSet API and implement algebraic operators are in Java. Here is a brief overview of what functionality can be found within flink/ folder.</p>
+<p>flink/ - top level directory containing all Flink related code</p>
+<p>flink/src/main/scala/org/apache/mahout/flinkbindings/blas/*.scala - Physical operator code for the Samsara DSL algebra</p>
+<p>flink/src/main/scala/org/apache/mahout/flinkbindings/drm/*.scala - Flink Dataset DRM and broadcast implementation</p>
+<p>flink/src/main/scala/org/apache/mahout/flinkbindings/io/*.scala - Read / Write between DRMDataSet and files on HDFS</p>
+<p>flink/src/main/scala/org/apache/mahout/flinkbindings/FlinkEngine.scala - DSL operator graph evaluator and various abstract API implementations for a distributed engine.</p>
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