Github user cloud-fan commented on the pull request:
https://github.com/apache/spark/pull/10604#issuecomment-169045155
A question about data distribution: When we read in a bucketed table, we
will generate one RDD partition for each bucket. However, how can we ensure the
distribution of this RDD is correct(the distribution is decided by HDFS)? i.e.
it's the same distribution after we shuffle the data.
cc @nongli @yhuai
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