Github user StephanEwen commented on the pull request:
https://github.com/apache/flink/pull/1741#issuecomment-195761969
I have started looking into this, but will need a bit more time...
Since there are already good sketches (in the attached PDF), it would be
great to add these sketches to the "internals" docs, with a few lines of
explanation. It might actually be interesting to a bunch of users...
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