Apache Druid

If nothing set default is 1 or we can set as per requirement. Not sure if we can add minimum  concurrency
<https://druid.apache.org/docs/latest/ingestion/native-batch.html>

thank you for answering
yes, I know that it’s default is 1, and to enable concurrency we need to set the max
but as I said, even when setting it to a high number, it sometimes ends being executed in a single subtask, not benefiting at all from the concurrency
so is there a way to force a minimum concurrency?

For native batch, `splitHintSpec` controls the number of tasks that will get launched: <https://druid.apache.org/docs/latest/ingestion/native-batch.html#split-hint-spec>

For SQL-based ingest (<https://druid.apache.org/docs/latest/multi-stage-query/index.html>) when `taskAssignment: max` (the default) we always launch as many tasks as possible below your `taskCount`. when `taskAssignment: auto` it's based on the size of inputs, but will also always remain below `taskCount`.