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From Al M <>
Subject Re: Shuffle produces one huge partition and many tiny partitions
Date Thu, 18 Jun 2015 07:59:25 GMT
Thanks for the suggestion.  Repartition didn't help us unfortunately.  It
still puts everything into the same partition.

We did manage to improve the situation by making a new partitioner that
extends HashPartitioner.  It treats certain "exception" keys differently. 
These keys that are known to appear very often are assigned random
partitions instead of using the existing partitioning mechanism.

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