A.map B.reduce C.partitionBy D.key by
A.jobmanager B.TaskManager C.master D.StandaloneSessionClusterEntrypoint
A.Tumbling Window(滾動(dòng)窗口) B.Sliding Window(滑動(dòng)窗口) C.Session Window(會(huì)話窗口) D.Local Window(局部窗口)