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Posted to issues@spark.apache.org by "Reynold Xin (JIRA)" <ji...@apache.org> on 2015/11/25 00:54:11 UTC

[jira] [Resolved] (SPARK-11914) [SQL] Support coalesce and repartition in Dataset APIs

     [ https://issues.apache.org/jira/browse/SPARK-11914?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Reynold Xin resolved SPARK-11914.
---------------------------------
       Resolution: Fixed
    Fix Version/s: 1.6.0

> [SQL] Support coalesce and repartition in Dataset APIs
> ------------------------------------------------------
>
>                 Key: SPARK-11914
>                 URL: https://issues.apache.org/jira/browse/SPARK-11914
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 1.6.0
>            Reporter: Xiao Li
>            Assignee: Xiao Li
>             Fix For: 1.6.0
>
>
> repartition: Returns a new [[Dataset]] that has exactly `numPartitions` partitions.
> coalesce: Returns a new [[Dataset]] that has exactly `numPartitions` partitions. Similar to coalesce defined on an [[RDD]], this operation results in a narrow dependency, e.g. if you go from 1000 partitions to 100 partitions, there will not be a shuffle, instead each of the 100 new partitions will claim 10 of the current partitions.



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