Every day at 3 a.m., Northern Trail Outfitter' (NTO) data lake instance starts generating a file that contains all records that should be sent one email or another for the next day's marketing campaigns. The size of the file varies depending on the previous day's tracking activity. As soon as the file is generated, NTO wants to import the data, segment the data, and then execute the daily sends.
What end-to-end process should deliver this efficiently?