Will-Lo commented on PR #3667:
URL: https://github.com/apache/gobblin/pull/3667#issuecomment-1500676439

   Responding to the top level comment: `would we wish to pre-aggregate that 
within the event itself`, I think aggregation is needed because there can be 
thousands of tasks for large pipelines, which makes serializing all the states 
into an event lead to large Kafka events which we want to avoid. Also, I think 
most clients wouldn't care too much about the inner details of every individual 
task/mapper, it's mainly the concern of the Gobblin framework to deal with 
correctly.


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