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From "Arun C Murthy (JIRA)" <j...@apache.org>
Subject [jira] Commented: (MAPREDUCE-279) Map-Reduce 2.0
Date Fri, 04 Mar 2011 15:57:37 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-279?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13002679#comment-13002679

Arun C Murthy commented on MAPREDUCE-279:

bq. How shuffle works in MapReduce 2.0 ?

Meng - pretty much the same as currently, the map-outputs are served over http.

We have discussed improvements to shuffle along the lines you have suggested for a long while
now (I just don't have the jiras handy) and I agree, they are excellent ideas.

Our hope is that with MRv2 we open up Map-Reduce to significant innovation so that folks can
try various ideas like the ones you suggested... make sense?

> Map-Reduce 2.0
> --------------
>                 Key: MAPREDUCE-279
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-279
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: jobtracker, tasktracker
>            Reporter: Arun C Murthy
>            Assignee: Arun C Murthy
>             Fix For: 0.23.0
> Re-factor MapReduce into a generic resource scheduler and a per-job, user-defined component
that manages the application execution. 

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