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From Apache Wiki <wikidi...@apache.org>
Subject [Cassandra Wiki] Trivial Update of "HadoopSupport" by EricGilmore
Date Wed, 02 Mar 2011 23:29:18 GMT
Dear Wiki user,

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

The "HadoopSupport" page has been changed by EricGilmore.
http://wiki.apache.org/cassandra/HadoopSupport?action=diff&rev1=25&rev2=26

--------------------------------------------------

  
  The nice thing about having a `TaskTracker` on every node is that you get data locality
and your analytics engine scales with your data. You also never need to shuttle around your
data once you've performed analytics on it - you simply output to Cassandra and you are able
to access that data with high random-read performance.
  
- One configuration note on getting the task trackers to be able to perform queries over Cassandra,
you'll want to update your `HADOOP_CLASSPATH` in your `<hadoop>/conf/hadoop-env.sh`
to include the Cassandra lib libraries.  For example you'll want to do something like this
in the `hadoop-env.sh` on each of your task trackers:
+ One configuration note on getting the task trackers to be able to perform queries over Cassandra:
 you'll want to update your `HADOOP_CLASSPATH` in your `<hadoop>/conf/hadoop-env.sh`
to include the Cassandra lib libraries.  For example you'll want to do something like this
in the `hadoop-env.sh` on each of your task trackers:
  
  {{{
  export HADOOP_CLASSPATH=/opt/cassandra/lib/*:$HADOOP_CLASSPATH

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