Also, does the offline data generation intentionally try to shuggle and generate segment data so segments will contain only one time-interval (ie: generate well-partitioned segments)?

yes,

Drafted up some FAQ entries on this at https://app.gitbook.com/@apache-pinot/s/apache-pinot-docs/~/drafts/-MGoGKJh3pWjk7X6SF5r/@drafts. Feel free to review & merge it, as I wasn't entirely sure what I synthesized there is correct or the full picture.

thanks, merged it