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druid will take care of the data stored in deep-storage as part of managing the data source. i.e if you have a 6month retention period on your datasource, once it triggers and deletes that data from druid, it will delete the deep storage data as part of the kill task.

Thanks @Nick M, this helps. Isn't there a way, however, to retain the data in deep storage for longer than what the data retention has been configured for inside the cluster?

All this comes down to how you have configured coordinator kill https://druid.apache.org/docs/latest/configuration/index.html#coordinator-operation If

druid.coordinator.kill.on

= false, the segments will not be removed from deep storage

Thanks @Kyle Hoondert @Nick M