Is there a known minimal set of lawful typeclasses that describe map/reduce? Here is my sketch at it:https://gist.github.com/johnynek/6e45ec989fb54e9cec51 …
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@avibryant@posco Related-- partitioning in spark. MR sorts and partitions by keys. In spark you must specify and use mapValues instead -
@avibryant@posco of map so you don't override whatever partitioning you are using. Ordering and locality are big impl differences.
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