Github user mxm commented on the pull request:
https://github.com/apache/flink/pull/604#issuecomment-93950872
That's a very nice graphical explanation of parallelism. :+1:
You could add another row with a job which changes parallelism in the
middle of the job. For example, caused by a GroupReduce without a grouping.
That would give users a hint about the kind of bottleneck such a transformation
causes.
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