Eventzeit
Eventzeit is a term used in data processing and event-driven systems to denote the time at which an observed event actually occurred, as recorded within the event data. It is used to distinguish the real-world timing of events from other notions of time, such as when an event is processed by a system or becomes visible to storage.
In practice, event time is the timestamp carried by the event itself or generated by the event’s
Streaming platforms and frameworks often emphasize event-time semantics. Systems like Apache Flink and Apache Beam rely
Challenges associated with event time include clock skew across distributed sources, unsynchronized clocks, and late data
Etymology: Eventzeit is the German expression for “event time,” used in technical contexts to describe the real
See also: event timestamp, processing time, watermarks, windowing, stream processing.