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Posted to commits@jena.apache.org by bu...@apache.org on 2015/02/17 14:56:22 UTC
svn commit: r940463 - in /websites/staging/jena/trunk/content: ./
documentation/hadoop/demo.html documentation/hadoop/demo.md
Author: buildbot
Date: Tue Feb 17 13:56:21 2015
New Revision: 940463
Log:
Staging update by buildbot for jena
Added:
websites/staging/jena/trunk/content/documentation/hadoop/demo.html
Removed:
websites/staging/jena/trunk/content/documentation/hadoop/demo.md
Modified:
websites/staging/jena/trunk/content/ (props changed)
Propchange: websites/staging/jena/trunk/content/
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+++ cms:source-revision Tue Feb 17 13:56:21 2015
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Added: websites/staging/jena/trunk/content/documentation/hadoop/demo.html
==============================================================================
--- websites/staging/jena/trunk/content/documentation/hadoop/demo.html (added)
+++ websites/staging/jena/trunk/content/documentation/hadoop/demo.html Tue Feb 17 13:56:21 2015
@@ -0,0 +1,259 @@
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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+ <h1 class="title">Apache Jena Elephas - RDF Stats Demo</h1>
+ <p>The RDF Stats Demo is a pre-built application available as a ready to run Hadoop Job JAR with all dependencies embedded within it. The demo app uses the other libraries to allow calculating a number of basic statistics over any RDF data supported by Elephas.</p>
+<p>To use it you will first need to build it from source or download the relevant Maven artefact:</p>
+<div class="codehilite"><pre><span class="nt"><dependency></span>
+ <span class="nt"><groupId></span>org.apache.jena<span class="nt"></groupId></span>
+ <span class="nt"><artifactId></span>jena-elephas-stats<span class="nt"></artifactId></span>
+ <span class="nt"><version></span>x.y.z<span class="nt"></version></span>
+ <span class="nt"><classifier></span>hadoop-job<span class="nt"></classifier></span>
+<span class="nt"></dependency></span>
+</pre></div>
+
+
+<p>Where <code>x.y.z</code> is the desired version.</p>
+<h1 id="pre-requisites">Pre-requisites</h1>
+<p>In order to run this demo you will need to have a Hadoop 2.x cluster available, for simple experimentation purposes a <a href="http://hadoop.apache.org/docs/current/hadoop-project-dist/hadoop-common/SingleCluster.html">single node cluster</a> will be sufficient.</p>
+<h1 id="running">Running</h1>
+<p>Assuming your cluster is started and running and the <code>hadoop</code> command is available on your path you can run the application without any arguments to see help:</p>
+<div class="codehilite"><pre><span class="o">></span> <span class="n">hadoop</span> <span class="n">jar</span> <span class="n">jena</span><span class="o">-</span><span class="n">elephas</span><span class="o">-</span><span class="n">stats</span><span class="o">-</span><span class="n">VERSION</span><span class="o">-</span><span class="n">hadoop</span><span class="o">-</span><span class="n">job</span><span class="p">.</span><span class="n">jar</span> <span class="n">org</span><span class="p">.</span><span class="n">apache</span><span class="p">.</span><span class="n">jena</span><span class="p">.</span><span class="n">hadoop</span><span class="p">.</span><span class="n">rdf</span><span class="p">.</span><span class="n">stats</span><span class="p">.</span><span class="n">RdfStats</span>
+<span class="n">NAME</span>
+ <span class="n">hadoop</span> <span class="n">jar</span> <span class="n">PATH_TO_JAR</span> <span class="n">org</span><span class="p">.</span><span class="n">apache</span><span class="p">.</span><span class="n">jena</span><span class="p">.</span><span class="n">hadoop</span><span class="p">.</span><span class="n">rdf</span><span class="p">.</span><span class="n">stats</span><span class="p">.</span><span class="n">RdfStats</span> <span class="o">-</span> <span class="n">A</span>
+ <span class="n">command</span> <span class="n">which</span> <span class="n">computes</span> <span class="n">statistics</span> <span class="n">on</span> <span class="n">RDF</span> <span class="n">data</span> <span class="n">using</span> <span class="n">Hadoop</span>
+
+<span class="n">SYNOPSIS</span>
+ <span class="n">hadoop</span> <span class="n">jar</span> <span class="n">PATH_TO_JAR</span> <span class="n">org</span><span class="p">.</span><span class="n">apache</span><span class="p">.</span><span class="n">jena</span><span class="p">.</span><span class="n">hadoop</span><span class="p">.</span><span class="n">rdf</span><span class="p">.</span><span class="n">stats</span><span class="p">.</span><span class="n">RdfStats</span>
+ <span class="p">[</span> <span class="p">{</span><span class="o">-</span><span class="n">a</span> <span class="o">|</span> <span class="o">--</span><span class="n">all</span><span class="p">}</span> <span class="p">]</span> <span class="p">[</span> <span class="p">{</span><span class="o">-</span><span class="n">d</span> <span class="o">|</span> <span class="o">--</span><span class="n">data</span><span class="o">-</span><span class="n">types</span><span class="p">}</span> <span class="p">]</span> <span class="p">[</span> <span class="p">{</span><span class="o">-</span><span class="n">g</span> <span class="o">|</span> <span class="o">--</span><span class="n">graph</span><span class="o">-</span><span class="n">sizes</span><span class="p">}</span> <span class="p">]</span>
+ <span class="p">[</span> <span class="p">{</span><span class="o">-</span><span class="n">h</span> <span class="o">|</span> <span class="o">--</span><span class="n">help</span><span class="p">}</span> <span class="p">]</span> <span class="p">[</span> <span class="o">--</span><span class="n">input</span><span class="o">-</span><span class="n">type</span> <span class="o"><</span><span class="n">inputType</span><span class="o">></span> <span class="p">]</span> <span class="p">[</span> <span class="p">{</span><span class="o">-</span><span class="n">n</span> <span class="o">|</span> <span class="o">--</span><span class="n">node</span><span class="o">-</span><span class="n">count</span><span class="p">}</span> <span class="p">]</span>
+ <span class="p">[</span> <span class="o">--</span><span class="n">namespaces</span> <span class="p">]</span> <span class="p">{</span><span class="o">-</span><span class="n">o</span> <span class="o">|</span> <span class="o">--</span><span class="n">output</span><span class="p">}</span> <span class="o"><</span><span class="n">OutputPath</span><span class="o">></span> <span class="p">[</span> <span class="p">{</span><span class="o">-</span><span class="n">t</span> <span class="o">|</span> <span class="o">--</span><span class="n">type</span><span class="o">-</span><span class="n">count</span><span class="p">}</span> <span class="p">]</span>
+ <span class="p">[</span><span class="o">--</span><span class="p">]</span> <span class="o"><</span><span class="n">InputPath</span><span class="o">></span><span class="p">...</span>
+
+<span class="n">OPTIONS</span>
+ <span class="o">-</span><span class="n">a</span><span class="p">,</span> <span class="o">--</span><span class="n">all</span>
+ <span class="n">Requests</span> <span class="n">that</span> <span class="n">all</span> <span class="n">available</span> <span class="n">statistics</span> <span class="n">be</span> <span class="n">calculated</span>
+
+ <span class="o">-</span><span class="n">d</span><span class="p">,</span> <span class="o">--</span><span class="n">data</span><span class="o">-</span><span class="n">types</span>
+ <span class="n">Requests</span> <span class="n">that</span> <span class="n">literal</span> <span class="n">data</span> <span class="n">type</span> <span class="n">usage</span> <span class="n">counts</span> <span class="n">be</span> <span class="n">calculated</span>
+
+ <span class="o">-</span><span class="n">g</span><span class="p">,</span> <span class="o">--</span><span class="n">graph</span><span class="o">-</span><span class="n">sizes</span>
+ <span class="n">Requests</span> <span class="n">that</span> <span class="n">the</span> <span class="nb">size</span> <span class="n">of</span> <span class="n">each</span> <span class="n">named</span> <span class="n">graph</span> <span class="n">be</span> <span class="n">counted</span>
+
+ <span class="o">-</span><span class="n">h</span><span class="p">,</span> <span class="o">--</span><span class="n">help</span>
+ <span class="n">Display</span> <span class="n">help</span> <span class="n">information</span>
+
+ <span class="o">--</span><span class="n">input</span><span class="o">-</span><span class="n">type</span> <span class="o"><</span><span class="n">inputType</span><span class="o">></span>
+ <span class="n">Specifies</span> <span class="n">whether</span> <span class="n">the</span> <span class="n">input</span> <span class="n">data</span> <span class="n">is</span> <span class="n">a</span> <span class="n">mixture</span> <span class="n">of</span> <span class="n">quads</span> <span class="n">and</span> <span class="n">triples</span><span class="p">,</span>
+ <span class="n">just</span> <span class="n">quads</span> <span class="n">or</span> <span class="n">just</span> <span class="n">triples</span><span class="p">.</span> <span class="n">Using</span> <span class="n">the</span> <span class="n">most</span> <span class="n">specific</span> <span class="n">data</span> <span class="n">type</span> <span class="n">will</span>
+ <span class="n">yield</span> <span class="n">the</span> <span class="n">most</span> <span class="n">accurate</span> <span class="n">statistics</span>
+
+ <span class="n">This</span> <span class="n">options</span> <span class="n">value</span> <span class="n">is</span> <span class="n">restricted</span> <span class="n">to</span> <span class="n">the</span> <span class="n">following</span> <span class="n">value</span><span class="p">(</span><span class="n">s</span><span class="p">):</span>
+ <span class="n">mixed</span>
+ <span class="n">quads</span>
+ <span class="n">triples</span>
+
+ <span class="o">-</span><span class="n">n</span><span class="p">,</span> <span class="o">--</span><span class="n">node</span><span class="o">-</span><span class="n">count</span>
+ <span class="n">Requests</span> <span class="n">that</span> <span class="n">node</span> <span class="n">usage</span> <span class="n">counts</span> <span class="n">be</span> <span class="n">calculated</span>
+
+ <span class="o">--</span><span class="n">namespaces</span>
+ <span class="n">Requests</span> <span class="n">that</span> <span class="n">namespace</span> <span class="n">usage</span> <span class="n">counts</span> <span class="n">be</span> <span class="n">calculated</span>
+
+ <span class="o">-</span><span class="n">o</span> <span class="o"><</span><span class="n">OutputPath</span><span class="o">></span><span class="p">,</span> <span class="o">--</span><span class="n">output</span> <span class="o"><</span><span class="n">OutputPath</span><span class="o">></span>
+ <span class="n">Sets</span> <span class="n">the</span> <span class="n">output</span> <span class="n">path</span>
+
+ <span class="o">-</span><span class="n">t</span><span class="p">,</span> <span class="o">--</span><span class="n">type</span><span class="o">-</span><span class="n">count</span>
+ <span class="n">Requests</span> <span class="n">that</span> <span class="n">rdf</span><span class="p">:</span><span class="n">type</span> <span class="n">usage</span> <span class="n">counts</span> <span class="n">be</span> <span class="n">calculated</span>
+
+ <span class="o">--</span>
+ <span class="n">This</span> <span class="n">option</span> <span class="n">can</span> <span class="n">be</span> <span class="n">used</span> <span class="n">to</span> <span class="n">separate</span> <span class="n">command</span><span class="o">-</span><span class="n">line</span> <span class="n">options</span> <span class="n">from</span> <span class="n">the</span>
+ <span class="n">list</span> <span class="n">of</span> <span class="n">argument</span><span class="p">,</span> <span class="p">(</span><span class="n">useful</span> <span class="n">when</span> <span class="n">arguments</span> <span class="n">might</span> <span class="n">be</span> <span class="n">mistaken</span> <span class="k">for</span>
+ <span class="n">command</span><span class="o">-</span><span class="n">line</span> <span class="n">options</span><span class="p">)</span>
+
+ <span class="o"><</span><span class="n">InputPath</span><span class="o">></span>
+ <span class="n">Sets</span> <span class="n">the</span> <span class="n">input</span> <span class="n">path</span><span class="p">(</span><span class="n">s</span><span class="p">)</span>
+</pre></div>
+
+
+<p>If we wanted to calculate the node count on some data we could do the following:</p>
+<div class="codehilite"><pre><span class="o">></span> <span class="n">hadoop</span> <span class="n">jar</span> <span class="n">jena</span><span class="o">-</span><span class="n">elephas</span><span class="o">-</span><span class="n">stats</span><span class="o">-</span><span class="n">VERSION</span><span class="o">-</span><span class="n">hadoop</span><span class="o">-</span><span class="n">job</span><span class="p">.</span><span class="n">jar</span> <span class="n">org</span><span class="p">.</span><span class="n">apache</span><span class="p">.</span><span class="n">jena</span><span class="p">.</span><span class="n">hadoop</span><span class="p">.</span><span class="n">rdf</span><span class="p">.</span><span class="n">stats</span><span class="p">.</span><span class="n">RdfStats</span> <span class="o">--</span><span class="n">node</span><span class="o">-</span><span class="n">count</span> <span class="o">--</span><span class="n">output</span> <span class="o">/</span><span class="n">e
xample</span><span class="o">/</span><span class="n">output</span> <span class="o">/</span><span class="n">example</span><span class="o">/</span><span class="n">input</span>
+</pre></div>
+
+
+<p>This calculates the node counts for the input data found in <code>/example/input</code> placing the generated counts in <code>/example/output</code></p>
+<h2 id="specifying-inputs-and-outputs">Specifying Inputs and Outputs</h2>
+<p>Inputs are specified simply by providing one or more paths to the data you wish to analyse. You can provide directory paths in which case all files within the directory will be processed.</p>
+<p>To specify the output location use the <code>-o</code> or <code>--output</code> option followed by the desired output path.</p>
+<p>By default the demo application assumes a mixture of quads and triples data, if you know your data is only in triples/quads then you can use the <code>--input-type</code> argument followed by <code>triples</code> or <code>quads</code> to indicate the type of your data. Not doing this can skew some statistics as the default is to assume mixed data and so all triples are upgraded into quads when calculating the statistics.</p>
+<h2 id="available-statistics">Available Statistics</h2>
+<p>The following statistics are available and are activated by the relevant command line option:</p>
+<table>
+ <tr><th>Command Line Option</th><th>Statistic</th><th>Description & Notes</th></tr>
+ <tr><td>`-n` or `--node-count`</td><td>Node Count</td><td>Counts the occurrences of each unique RDF term i.e. node in Jena parlance</td></tr>
+ <tr><td>`-t` or `--type-count`</td><td>Type Count</td><td>Counts the occurrences of each declared `rdf:type` value</td></tr>
+ <tr><td>`-d` or `--data-types`</td><td>Data Type Count</td><td>Counts the occurrences of each declared literal data type</td></tr>
+ <tr><td>`--namespaces`</td><td>Namespace Counts</td><td>Counts the occurrences of namespaces within the data.<br />Namespaces are determined by splitting URIs at the `#` fragment separator if present and if not the last `/` character
+ <tr><td>`-g` or `--graph-sizes`</td><td>Graph Sizes</td><td>Counts the sizes of each graph declared in the data</td></tr>
+</table>
+
+<p>You can also use the <code>-a</code> or <code>--all</code> option if you simply wish to calculate all statistics.</p>
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