title: Deploy JAR for MapReduce job in Hadoop Cluster
body: <p>Sorry about the dum question.
  I've a 5 node hadoop cluster in CentOS linux.</p>
  
  <p>Name node /
  Job Tracker /
  Secondary Name Node /
  Data node - 2</p>
  
  <p>I wrote a map reduce and compiled the JAR. To which node I need to deploy the JAR?</p>
  
  <p>Thanks in advance.</p>