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https://issues.apache.org/jira/browse/SPARK-3655?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14694302#comment-14694302
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Koert Kuipers commented on SPARK-3655:
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it depends on the size of your values per key.
if the values per key fit comfortably in memory then you can just do
groupBy and sort values yourself. i not i would use spark-sorted. i would
not use groupByKeyAndSortValues (from
https://github.com/apache/spark/pull/3632)
On Wed, Aug 12, 2015 at 5:55 PM, SWETHARAM KASIREDDI (JIRA) <j...@apache.org
> Support sorting of values in addition to keys (i.e. 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, 1.2.0
> Reporter: koert kuipers
> Assignee: Koert Kuipers
>
> 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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