Windowing.
also: tumbling window · tumbling windows · session window · session windowsGrouping a stream into time windows: tumbling (fixed, non-overlapping), sliding (overlapping) or session (closed after an inactivity gap).
the two-minute refresher
- Tumbling: [00:00-01:00), [01:00-02:00)… each event in exactly one window.
- Sliding: windows overlap, so one late event can be late for several windows.
- Session: closes after a gap of inactivity; a late event can extend or merge sessions.
- A window fires when the watermark passes its end.