[jira] [Commented] (SPARK-14042) Add support for custom coalescers

["Apache Spark (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-14042?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15205038#comment-15205038 ] 

Apache Spark commented on SPARK-14042:
--------------------------------------

User 'nezihyigitbasi' has created a pull request for this issue:
https://github.com/apache/spark/pull/11865

> Add support for custom coalescers
> ---------------------------------
>
>                 Key: SPARK-14042
>                 URL: https://issues.apache.org/jira/browse/SPARK-14042
>             Project: Spark
>          Issue Type: New Feature
>          Components: Spark Core
>            Reporter: Nezih Yigitbasi
>
> Per our discussion on the mailing list (please see [here|http://mail-archives.apache.org/mod_mbox//spark-dev/201602.mbox/%3CCA+g63F7aVRBH=WyyK3nvBSLCMPtSdUuL_Ge9=WW4DnmnvY4SXg@mail.gmail.com%3E]) it would be nice to specify a custom coalescing policy as the current {{coalesce()}} method only allows the user to specify the number of partitions and we cannot really control much. The need for this feature popped up when I wanted to merge small files by coalescing them by size.



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