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Posted to commits@pulsar.apache.org by GitBox <gi...@apache.org> on 2022/02/10 06:35:47 UTC

[GitHub] [pulsar] youzipi commented on issue #14190: 请教：event time的应用场景是什么？

youzipi commented on issue #14190:
URL: https://github.com/apache/pulsar/issues/14190#issuecomment-1034547766


   @startjava 
   event time is introduced here: https://github.com/apache/pulsar/wiki/PIP-5:-Event-time
   
   event time is used to clarify the order which event happens in streaming processing.
   
   for example, we have an order, it has 3 events ( by order of occurrence): `create`, `payed`,`cancel`.
   we may receive the `payed` after `cancel`, with event time, we can make sure  final status is `canceled`.
   
   simply, you can think the event time as `logical clock`.
   
   
   
   


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