@Bala Vignesh N V Edge node refers to a dedicated node (machine) where no Hadoop services are running, and where you install only so-called Hadoop clients (hdfs, Hive, HBase etc. clients). In your case your BI tool will also play a role of a Hadoop client. A client means that only respective component client libraries and scripts will be installed, together with its config files. If you change config through Ambari, then Ambari will automatically refresh config files on the edge node as well. In a small, test cluster without an edge node you can select one node where Hadoop services are running (for example, a master node) to play a role of your edge node. (In a large cluster with many users there are usually multiple edge nodes.) As the "edge node folder" you can use any folder on the edge node you decide to use. Usually we execute Sqoop, hdfs, Oozie, ...etc commands from an edgenode.
Edgenode is a client-facing machine that has all client tools to
operate on a cluster. It is not a good idea to use NameNode or other HDP
components as your edgenode. Typically you'd want a separate node
designated just for client access. Worker nodes make up the majority of virtual machines and perform the job of storing the data and running computations. Worker nodes usually runs both a DataNode and NodeManager ..etc kind of services. https://community.hortonworks.com/questions/87884/which-node-to-use.html
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