Nezih Yigitbasi created SPARK-14042:
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Summary: 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=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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