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Posted to issues@flink.apache.org by "ASF GitHub Bot (JIRA)" <ji...@apache.org> on 2017/07/16 16:23:00 UTC
[jira] [Commented] (FLINK-7204) CombineHint.NONE

    [ https://issues.apache.org/jira/browse/FLINK-7204?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16088997#comment-16088997 ] 

ASF GitHub Bot commented on FLINK-7204:
---------------------------------------

GitHub user greghogan opened a pull request:

    https://github.com/apache/flink/pull/4350

    [FLINK-7204] [core] CombineHint.NONE

    FLINK-3477 added a hash-combine preceding the reducer configured with CombineHint.HASH or CombineHint.SORT (default). In some cases it may be useful to disable the combiner in ReduceNode by specifying a new CombineHint.NONE value.
    
    We don't currently have unit tests for this part of the code but I'm happy to discuss and add some.

You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/greghogan/flink 7204_combinehint_none

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/flink/pull/4350.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #4350
    
----
commit d08284a61d3af58cb28b47a3190c4dc31b62fa8b
Author: Greg Hogan <co...@greghogan.com>
Date:   2017-07-16T11:24:59Z

    [FLINK-7204] [core] CombineHint.NONE
    
    FLINK-3477 added a hash-combine preceding the reducer configured with
    CombineHint.HASH or CombineHint.SORT (default). In some cases it may be
    useful to disable the combiner in ReduceNode by specifying a new
    CombineHint.NONE value.

----


> CombineHint.NONE
> ----------------
>
>                 Key: FLINK-7204
>                 URL: https://issues.apache.org/jira/browse/FLINK-7204
>             Project: Flink
>          Issue Type: New Feature
>          Components: Core
>    Affects Versions: 1.4.0
>            Reporter: Greg Hogan
>            Assignee: Greg Hogan
>            Priority: Minor
>
> FLINK-3477 added a hash-combine preceding the reducer configured with {{CombineHint.HASH}} or {{CombineHint.SORT}} (default). In some cases it may be useful to disable the combiner in {{ReduceNode}} by specifying a new {{CombineHint.NONE}} value.



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