MillWheelisaframeworkforbuildinglow-latencydata-processingapplicationsthatiswidelyusedatGoogle.Usersspecifyadirectedcomputationgraphandapplicationcodeforindividualnodes,andthesystemmanagespersistentstateandthecontinuousflowofrecords,allwithintheenvelopeoftheframework’sfault-tolerancegua