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From Apache Wiki <wikidi...@apache.org>
Subject [Hadoop Wiki] Trivial Update of "GettingStartedWithHadoop" by AlexLoddengaard
Date Fri, 29 Aug 2008 06:09:45 GMT
Dear Wiki user,

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

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  === Separating Configuration from Installation ===
  In the example described above, the configuration files used by the Hadoop cluster all lie
in the Hadoop installation. This can become cumbersome when upgrading to a new release since
all custom config has to be re-created in the new installation. It is possible to separate
the config from the install. To do so, select a 
- directory to house Hadoop configuration (let's say {{{/foo/bar/hadoop-config}}}. Copy the
{{{hadoop-site.xml, slaves}}} and {{{hadoop-env.sh}}} files to this directory. You can either
set the {{{HADOOP_CONF_DIR}}} environment variable to refer to this directory or pass it directly
to the Hadoop scripts with the {{{--config}}} option.
+ directory to house Hadoop configuration (let's say {{{/foo/bar/hadoop-config}}}. Copy all
conf files to this directory. You can either set the {{{HADOOP_CONF_DIR}}} environment variable
to refer to this directory or pass it directly to the Hadoop scripts with the {{{--config}}}
option.
  In this case, the cluster start and stop commands specified in the above two sub-sections
become [[BR]] {{{% $HADOOP_INSTALL/hadoop/bin/start-all.sh --config /foo/bar/hadoop-config}}}
and [[BR]] {{{% $HADOOP_INSTALL/hadoop/bin/stop-all.sh --config /foo/bar/hadoop-config}}}.
[[BR]] Only the absolute path to the config directory should be passed to the scripts.
  
  === Starting up a larger cluster ===

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