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From Apache Wiki <wikidi...@apache.org>
Subject [Lucene-hadoop Wiki] Update of "GettingStartedWithHadoop" by NigelDaley
Date Thu, 12 Oct 2006 05:38:36 GMT
Dear Wiki user,

You have subscribed to a wiki page or wiki category on "Lucene-hadoop Wiki" for change notification.

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

The comment on the change is:
Attempted to make the "Namenode Formatting" section sound less scary

------------------------------------------------------------------------------
    * {{{mapred.local.dir}}}
  
  === Formatting the Namenode ===
- The first step to starting up your Hadoop installation is formatting the filesystem. You
need to do this the first time you set up a Hadoop installation. '''Do not''' format a running
filesystem, this will cause all your data to be erased. To format the filesystem, run the
command: [[BR]] {{{% $HADOOP_INSTALL/hadoop/bin/hadoop namenode -format}}}
+ The first step to starting up your Hadoop installation is formatting the Hadoop filesystem,
which is implemented on top of the local filesystems of your cluster. You need to do this
the first time you set up a Hadoop installation. '''Do not''' format a running Hadoop filesystem,
this will cause all your data to be erased. To format the filesystem (which simply initializes
the directory specified by the {{{dfs.name.dir}}} variable), run the command: [[BR]] {{{%
$HADOOP_INSTALL/hadoop/bin/hadoop namenode -format}}}
  
  === Starting a Single node cluster ===
  Run the command: [[BR]] {{{% $HADOOP_INSTALL/hadoop/bin/start-all.sh}}} [[BR]] This will
startup a Namenode, Datanode, Jobtracker and a Tasktracker on your machine.

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