Author: buildbot
Date: Tue Feb 17 14:52:03 2015
New Revision: 940475
Log:
Staging update by buildbot for jena
Modified:
websites/staging/jena/trunk/content/ (props changed)
websites/staging/jena/trunk/content/documentation/hadoop/mapred.html
Propchange: websites/staging/jena/trunk/content/
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Modified: websites/staging/jena/trunk/content/documentation/hadoop/mapred.html
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--- websites/staging/jena/trunk/content/documentation/hadoop/mapred.html
(original)
+++ websites/staging/jena/trunk/content/documentation/hadoop/mapred.html Tue
Feb 17 14:52:03 2015
@@ -179,7 +179,7 @@
<li>Splitting</li>
<li>Transforming</li>
</ul>
-<p>Note that standard Map/Reduce programming rules apply as normal. For
example if a mapper/reducer transforms between data types then you need to make
<code>setMapOutputKeyClass()</code>, <code>setMapOutputValueClass()</code>,
<code>setReducerOutputKeyClass()</code> and
<code>setReducerOutputValueClass()</code> calls on your Job configuration as
necessary.</p>
+<p>Note that standard Map/Reduce programming rules apply as normal. For
example if a mapper/reducer transforms between data types then you need to make
<code>setMapOutputKeyClass()</code>, <code>setMapOutputValueClass()</code>,
<code>setOutputKeyClass()</code> and <code>setOutputValueClass()</code> calls
on your Job configuration as necessary.</p>
<h2 id="counting">Counting</h2>
<p>Counting is one of the classic Map/Reduce tasks and features as both the
official Map/Reduce example for both Hadoop itself and for Elephas.
Implementations cover a number of different counting tasks that you might want
to carry out upon RDF data, in most cases you will use the desired
<code>Mapper</code> implementation in conjunction with the
<code>NodeCountReducer</code>.</p>
<h3 id="node-usage">Node Usage</h3>