title: Determin whether slave nodes in hadoop cluster has been assigned tasks
body: <p>I'm new to Hadoop and MapReduce. I just deployed a Hadoop cluster with one master machine and 32 slave machines. However when I start to run an example program, it seems that it just runs to slow. How can I determine whether a map/reduce task has really been assigned to a slave node for execution?</p>
  
  <p>The example program is executed like that:</p>
  
  <pre><code>hadoop jar ${HADOOP_HOME}/share/hadoop/mapreduce/hadoop-mapreduce-examples-2.7.2.jar pi 32 100
  </code></pre>