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https://issues.apache.org/jira/browse/MAPREDUCE-4808?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13526506#comment-13526506
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Arun C Murthy commented on MAPREDUCE-4808:
------------------------------------------

On second thoughts, a simpler solution: why don't we use a simplified version 
of Merger as the interface?

This way Syncsort can just implement that, why bother with trying to deal with 
memory reservation etc.?
                
> Allow reduce-side merge to be pluggable
> ---------------------------------------
>
>                 Key: MAPREDUCE-4808
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4808
>             Project: Hadoop Map/Reduce
>          Issue Type: Sub-task
>    Affects Versions: 2.0.2-alpha
>            Reporter: Arun C Murthy
>            Assignee: Mariappan Asokan
>             Fix For: 2.0.3-alpha
>
>         Attachments: COMBO-mapreduce-4809-4812-4808.patch, 
> mapreduce-4808.patch
>
>
> Allow reduce-side merge to be pluggable for MAPREDUCE-2454

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