Github user mateiz commented on the pull request:
https://github.com/apache/spark/pull/931#issuecomment-50703819
@xiajunluan we can now do this using the ExternalSorter added in #1499: see
the new PR at https://github.com/apache/spark/pull/1677. Would you mind closing
this old one? The new PR avoids some of the problems I mentioned above with
each key having too many values.
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