Technical GlossaryData Engineering and AI Infrastructure
Event Time
A time concept expressing when an event actually occurred, independent of when it reached the system.
Event time is a critical concept in stream processing because it preserves the real temporal meaning of data. An event may arrive late because of network delay or queueing, but analytically what matters is when the event actually happened. For that reason, event-time-based windows and calculations better reflect real-world behavior. Using the wrong time model can cause serious interpretation errors, especially in operational decision systems.
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