title: Replication factor
body: <p>I am new to Hadoop and I want to understand how do we determine the highest replication factor we can have for any given cluster. I know that the default setting is 3 replicas, but if I have a cluster with 5  node what is the highest replication factor that I can user in that case. Is there a formula that we have to follow to determine the replication factor?</p>
  
  <p>Thank you</p>