i see that in IAP package it does not start any real time node.I am ingesting data through tranquility.My confusion is that in this schema of things which node will serve my real time queries.
When using tranquility, your data is indexed and served by middleManagers. Each one starts up tasks which behave like mini-realtime-nodes. They do all the same things (index, serve, publish, handoff).
So indexing service / realtime nodes are an either / or thing, you don’t need both in the same cluster.