title: Do users need to exist across all nodes to be recognized by the hadoop cluster / HDFS?
body: <p>In MapR hadoop, in order for a user to be able to access HDFS or use YARN for programs, they <strong>needed to exist across all nodes in the cluster</strong> (with same uid and gid), this includes client nodes that don't act as either data nodes or control nodes (MapR does not really have the concept of namenodes). Is this the same for Hortonworks HDP?</p>