Related pr: https://github.com/apache/doris/pull/11582 https://github.com/apache/doris/pull/12048 Using new file scan node and new scheduling framework to do the load job, replace the old broker scan node. The load part (Be part) is work in progress. Query part (Fe) has been tested using tpch benchmark. Please review only the FE code in this pr, BE code has been disabled by enable_new_load_scan_node configuration. Will send another pr soon to fix be side code.