Network access between Dremio cluster and an external source

Hi community,

When we add an external source (MySQL) to the Dremio cluster, do all nodes in the cluster need to be accessible to the external source or the Coordinator node alone is enough?

thank you,

@borasy Both the coordinators and executors would need access to MySQL as the coordinator retrieves metadata from MySQL and plans the query while executors connect to MySQL to retrieve the actual data

Many thanks. Really appreciate your support.