title: Edge nodes in hadoop cluster
body: <p>Can Some one explain me the architecture of Edge node in hadoop.
  I am able to find only the definition on the internet, I have the following queries -</p>
  
  <p>1) Does the edge node have to be part of the cluster (What advantages do we have if it is inside the cluster?). Does it store any blocks of data in hdfs.</p>
  
  <p>2) Can the edge node be outside the cluster?</p>