Stream Processing
Stream processing continuously transforms data as records arrive. It lets you calculate, join, detect, or route information before waiting for a complete batch.
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Intro
Stream Processing
Stream processing is computation over data that keeps arriving. A payment, sensor reading, click, or database change enters a pipeline as a record. The pipeline transforms it and may produce a result straight away.
The important shift is that the input may never end. A batch job can wait for a complete dataset. A stream processor must decide what a useful result means while more records are still on the way.
The processing model
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