Github user shivaram commented on the pull request:
https://github.com/apache/spark/pull/27#issuecomment-36271766
IMHO it would be better to try the simpler solution first and see how it
works -- With a large enough number of executors I think the probability of
seeing the same executors repeatedly should be pretty small
P.S: (It looks like an instance of balls-bins problem to me, so the
imbalance should be at worst log N ?).
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