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From conflue...@apache.org
Subject [CONF] Apache Labs: CloudsMapReduce (page edited)
Date Thu, 02 Jul 2009 15:18:00 GMT
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<div id="PageContent">
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<td valign="top" class="pagebody">

    <div class="pageheader">
        <span class="pagetitle">
            Page Edited :
            <a href="http://cwiki.apache.org/confluence/display/labs">labs</a>
:
            <a href="http://cwiki.apache.org/confluence/display/labs/CloudsMapReduce">CloudsMapReduce</a>
        </span>
    </div>

     <p>
        <a href="http://cwiki.apache.org/confluence/display/labs/CloudsMapReduce">CloudsMapReduce</a>
        has been edited by             <a href="http://cwiki.apache.org/confluence/display/~robert%2Bburrell%2Bdonkin">Robert
Burrell Donkin</a>
            <span class="smallfont">(Jul 02, 2009)</span>.
     </p>
    
     <p>
                 <a href="http://cwiki.apache.org/confluence/pages/diffpagesbyversion.action?pageId=117382&originalVersion=8&revisedVersion=9">(View
changes)</a>
     </p>

    <span class="label">Content:</span><br/>
    <div class="greybox wiki-content"><table cellpadding='5' width='85%' cellspacing='8px'
class='tipMacro' border="0" align='center'><colgroup><col width='24'><col></colgroup><tr><td
valign='top'><img src="/confluence/images/icons/emoticons/check.gif" width="16" height="16"
align="absmiddle" alt="" border="0"></td><td><b class="strong">Get Involved</b><br
/>
<p>Fill in the gaps<br/>
<span class="nobr"><a href="https://issues.apache.org/jira/browse/LABS" title="Visit
page outside Confluence" rel="nofollow">Create an issue <sup><img class="rendericon"
src="/confluence/images/icons/linkext7.gif" height="7" width="7" align="absmiddle" alt=""
border="0"/></sup></a></span><br/>
Or discuss on <span class="nobr"><a href="http://labs.apache.org/mail.html" title="Visit
page outside Confluence" rel="nofollow">list <sup><img class="rendericon" src="/confluence/images/icons/linkext7.gif"
height="7" width="7" align="absmiddle" alt="" border="0"/></sup></a></span></p></td></tr></table>

<blockquote>
<p>Are you amazed by the fast response you get while searching the Web with Google or
Yahoo? Have you ever wondered how these services manage to search millions of pages and return
your results in milliseconds or less? The algorithms that drive both of these major-league
search services originated with Google's MapReduce framework.</p></blockquote>
<p><span class="nobr"><a href="http://www.javaworld.com/javaworld/jw-09-2008/jw-09-hadoop.html"
title="Visit page outside Confluence" rel="nofollow">Java World <sup><img class="rendericon"
src="/confluence/images/icons/linkext7.gif" height="7" width="7" align="absmiddle" alt=""
border="0"/></sup></a></span> hyperbole, 2008</p>

<blockquote>
<p>Map/Reduce will kill every traditional data warehousing vendor in the market. Those
who adapt to it as a design/deployment pattern will survive, the rest won't. Database systems
that have no concept of being multiple node are pretty much dead. If there is no scale out
story, then there is not future going forward.</p></blockquote>
<p><span class="nobr"><a href="http://krow.livejournal.com/622006.html" title="Visit
page outside Confluence" rel="nofollow">Brian "Krow" Aker <sup><img class="rendericon"
src="/confluence/images/icons/linkext7.gif" height="7" width="7" align="absmiddle" alt=""
border="0"/></sup></a></span>, 2008</p>

<blockquote>
<p>In essence, it allows massive data sets to be processed in a distributed fashion
by breaking the processing into many small computations of two types: a map operation that
transforms the input into an intermediate representation, and a reduce function that recombines
the intermediate representation into the final output.</p></blockquote>
<p><span class="nobr"><a href="http://weblogs.java.net/blog/tomwhite/archive/2005/09/mapreduce.html"
title="Visit page outside Confluence" rel="nofollow">Tom White <sup><img class="rendericon"
src="/confluence/images/icons/linkext7.gif" height="7" width="7" align="absmiddle" alt=""
border="0"/></sup></a></span>, 2005</p>

<p>Applications:</p>
<ul>
	<li><a href="/confluence/display/labs/CloudsApacheHadoop" title="CloudsApacheHadoop">CloudsApacheHadoop</a>
is a distributed computing platform</li>
	<li><a href="/confluence/display/labs/CloudsApacheHama" title="CloudsApacheHama">CloudsApacheHama</a>
is a distributed matrix computation package</li>
	<li><a href="/confluence/display/labs/CloudsApacheHBase" title="CloudsApacheHBase">CloudsApacheHBase</a>
is the Hadoop data store</li>
	<li><a href="/confluence/display/labs/CloudsApacheMahout" title="CloudsApacheMahout">CloudsApacheMahout</a>
develops scalable machine learning libraries</li>
</ul>


<p>Presentations:</p>
<ul>
	<li><a href="/confluence/display/labs/CloudsThePresentations#CloudsThePresentations-HadoopEtMapReduce"
title="HadoopEtMapReduce on CloudsThePresentations">Hadoop et MapReduce : traitement distribué
à l'échelle du web </a></li>
	<li><a href="/confluence/display/labs/CloudsThePresentations#CloudsThePresentations-HadoopMapReduceArchitecture"
title="HadoopMapReduceArchitecture on CloudsThePresentations">Hadoop Map/Reduce Architecture
</a></li>
	<li><a href="/confluence/display/labs/CloudsThePresentations#CloudsThePresentations-HadoopMapReduceTuningandDebugging"
title="HadoopMapReduceTuningandDebugging on CloudsThePresentations">Hadoop Map-Reduce Tuning
and Debugging </a></li>
	<li><a href="/confluence/display/labs/CloudsThePresentations#CloudsThePresentations-MapReduceApacheHadoop"
title="MapReduceApacheHadoop on CloudsThePresentations">MapReduce &amp; Apache Hadoop
</a></li>
	<li><a href="/confluence/display/labs/CloudsThePresentations#CloudsThePresentations-MapReduceVsSQL"
title="MapReduceVsSQL on CloudsThePresentations">MapReduce vs SQL </a></li>
	<li><a href="/confluence/display/labs/CloudsThePresentations#CloudsThePresentations-ProgrammingWithHadoopsMapReduce"
title="ProgrammingWithHadoopsMapReduce on CloudsThePresentations">Programming with Hadoops
Map Reduce </a></li>
	<li><a href="/confluence/display/labs/CloudsThePresentations#CloudsThePresentations-UnderstandingMapReduceWithHadoop"
title="UnderstandingMapReduceWithHadoop on CloudsThePresentations">Understanding MapReduce
with Hadoop </a></li>
</ul>


<p>Papers:</p>
<ul>
	<li><a href="/confluence/display/labs/CloudsThePresentations#CloudsThePresentations-GoogleMapReduce"
title="GoogleMapReduce on CloudsThePresentations">MapReduce: Simplified Data Processing
on Large Clusters </a></li>
</ul>


<p>See Also:</p>
<ul>
	<li><a href="/confluence/display/labs/CloudsDistributedFileSystem" title="CloudsDistributedFileSystem">CloudsDistributedFileSystem</a></li>
</ul>


<h2><a name="CloudsMapReduce-PowerThroughSimplicity"></a>Power Through Simplicity</h2>
<blockquote>
<p>MapReduce is a programming model and an associated implementation for processing
and generating large data sets. Users specify a map function that processes a key/value pair
to generate a set of intermediate key/value pairs, and a reduce function that merges all intermediate
values associated with the same intermediate key. Many real world tasks are expressible in
this model, as shown in the paper.</p></blockquote>
<p><a href="/confluence/display/labs/CloudsThePresentations#CloudsThePresentations-GoogleMapReduce"
title="GoogleMapReduce on CloudsThePresentations">Google Research </a>, <em>Map
Reduce</em></p>

<h2><a name="CloudsMapReduce-MapReduceAsPlatform"></a>Map Reduce As Platform</h2>
<blockquote>
<p>Programs written in this functional style are automatically parallelized and executed
on a large cluster of commodity machines. The run-time system takes care of the details of
partitioning the input data, scheduling the program's execution across a set of machines,
handling machine failures, and managing the required inter-machine communication. This allows
programmers without any experience with parallel and distributed systems to easily utilize
the resources of a large distributed system.</p></blockquote>
<p><a href="/confluence/display/labs/CloudsThePresentations#CloudsThePresentations-GoogleMapReduce"
title="GoogleMapReduce on CloudsThePresentations">Google Research </a>, <em>Map
Reduce</em></p></div>


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