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  • Zenifer Cheruveettil thinks this is interesting:

When windowing by processing time, the system essentially buffers up incoming data into windows until some amount of processing time has passed. For example, in the case of five-minute fixed windows, the system would buffer up data for five minutes of processing time, after which it would treat all the data it had observed in those five minutes as a window, and send them downstream for processing.


Cover of Streaming Systems


again, this is the usecase of provider integration