Event-time streaming deck
Recall event-time concepts and choose when to use preliminary, final, and late-correction outputs.
Clock What is the difference between event time and processing time? Event time is when the business event occurred; processing time is when the pipeline observed or processed it. Use event time when the metric should describe reality, not system arrival order. Window result Preliminary or final? Both can be correct if consumers know which state they are reading. Objection Why did yesterday's real-time number change? That makes the dashboard untrustworthy. A late mobile event batch arrived after the early pane was published. Your line The earlier number was preliminary. Late events are accepted for two hours, then the window…
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