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https://issues.apache.org/jira/browse/SPARK-3655?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14179252#comment-14179252
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koert kuipers commented on SPARK-3655:
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hey matei,
i was referring to the partition by one key and values sorted by another.
does adding a keyOrdering in the ShuffleDependency lead to an efficient
(secondary) sorting on that key in the sort-based shuffle? i haven't looked at
the code yet for SortShuffleManager and SortShuffleWriter...
> Secondary sort
> --------------
>
> Key: SPARK-3655
> URL: https://issues.apache.org/jira/browse/SPARK-3655
> Project: Spark
> Issue Type: New Feature
> Components: Spark Core
> Affects Versions: 1.1.0
> Reporter: koert kuipers
> Priority: Minor
>
> Now that spark has a sort based shuffle, can we expect a secondary sort soon?
> There are some use cases where getting a sorted iterator of values per key is
> helpful.
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