Number of Coordinators

If I add n coordinators I will have (n+1) coordinators including master coordinator.
If newly added coordinators do not have master role.

1.Is the query planning distributed among the coordinators for both API as well as JDBC connection…?

  1. Can a non master role coordinator serve the query request or should only master coordinator serve the request.(I mean does external client directly talks to master coordinator…?)


Scale out coordinators only do planning and only JDBC/ODBC requests. Before you go down the route of adding scale out coordinators, do you see a symptom that needs scale out?

We wanted to perform load balancing for submitted queries.