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From: Apache Wiki <wikidiffs@apache.org>
To: hadoop-commits@lucene.apache.org
Date: Tue, 08 Aug 2006 21:29:31 -0000
Message-ID: <20060808212931.18121.95600@ajax.apache.org>
Subject: [Lucene-hadoop Wiki] Update of "FrontPage" by OwenOMalley

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The following page has been changed by OwenOMalley:
http://wiki.apache.org/lucene-hadoop/FrontPage

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  [http://lucene.apache.org/hadoop/ Hadoop] is a framework for running applications on large clusters built of commodity hardware. The Hadoop framework transparently provides applications both reliability and data motion. Hadoop implements a computational paradigm named [:HadoopMapReduce: Map/Reduce], where the application is divided into many small fragments of work, each of which may be executed or reexecuted on any node in the cluster. In addition, it provides a distributed file system that stores data on the compute nodes and thereby provides very high aggregate bandwidth across the cluster. Both Map/Reduce and the distributed file system are designed so that node failures are automatically handled by the network.
  
  The intent is to scale Hadoop up to handling thousand of computers. The current high water marks that have been reported are:
-  * !DataNodes: 620
-  * !TaskTrackers: 500
+  * Nodes in a single file system cluster (!DataNodes): 620
+  * Nodes in a single map/reduce cluster (!TaskTrackers): 500
  
  Hadoop was originally built as infrastructure for the [http://lucene.apache.org/nutch/ Nutch] project, which crawls the web and builds a search engine index for the crawled pages. Both Hadoop and Nutch are part of the [http://lucene.apache.org/java/docs/index.html Lucene] [http://www.apache.org/ Apache] project.