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From Apache Wiki <wikidi...@apache.org>
Subject [Lucene-hadoop Wiki] Update of "GettingStartedWithHadoop" by mahadevkonar
Date Fri, 25 Aug 2006 18:07:51 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 mahadevkonar:

+ = Setting Up a Single node Hadoop cluster =
+ == Environment Variables ==
+  * Set the environment variable HADOOP_CONF_DIR to the configure directory. For more information
on how to configure Hadoop, take a look at HowToConfigure section.
+ == Starting up a single node cluster ==
+   * Change the configuration property in hadoop-default.xml in the configure directory to
localhost:port. Choose a free port for your Namenode to run on.
+ === Formatting the Namenode ===
+  * You are required to format the Namenode for your first installation. This is true only
for your first installation. Do not format a Namenode which was already running Hadoop. It
will clear up your DFS. Run bin/hadoop namenode -format to format your Namenode.
+ === Starting up the cluster ===
+  * Run bin/start-all.sh. This will startup a Namenode, Datanode, Jobtracker and a Tasktracker
on your machine.
+ === Stopping the cluster ===
+  * Run bin/stop-all.sh to stop all the daemons running on your machine.
  = Setting Up a Cluster using Hadoop scripts =
  This section explains how to set up a Hadoop cluster running Hadoop DFS and Hadoop Mapreduce.
The startup scripts are in hadoop/bin. The file that contains all the slave nodes that would
join the DFS and map reduce cluster is the slaves file in hadoop/conf. Edit the slaves file
to add nodes to your cluster. You need to edit the slaves file only on the machines you plan
to run the Jobtracker and Namenode on. Next edit the file hadoop-env.sh in the hadoop/conf
directory. Make sure JAVA_HOME is set correctly. You can change the other environment variables
as per your requirements. HADOOP_HOME is automatically determined depending on where you run
your hadoop scripts from.

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