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https://issues.apache.org/jira/browse/SPARK-14042?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Reynold Xin resolved SPARK-14042.
---------------------------------
       Resolution: Fixed
         Assignee: Nezih Yigitbasi
    Fix Version/s: 2.0.0

> 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
>            Assignee: Nezih Yigitbasi
>             Fix For: 2.0.0
>
>
> 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=ww4dnmnvy4...@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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