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From "Devaraj Das (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-3366) Shuffle/Merge improvements
Date Fri, 06 Jun 2008 14:27:45 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-3366?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Devaraj Das updated HADOOP-3366:

    Attachment: 3366.reducetask.patch

Here is a patch for just the ReduceTask.java that outlines the synchronization that we were
thinking about...  Its a very quickly written patch.. So don't be surprised if you see glaring
issues (e.g. i could have used a AtomicBoolean instead of Boolean) but it gives the idea..
This looks much simple I think (i hope i didn't miss some cases where it absolutely won't

> Shuffle/Merge improvements
> --------------------------
>                 Key: HADOOP-3366
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3366
>             Project: Hadoop Core
>          Issue Type: Improvement
>          Components: mapred
>            Reporter: Arun C Murthy
>            Assignee: Arun C Murthy
>             Fix For: 0.18.0
>         Attachments: 3366.1.patch, 3366.1.patch, 3366.reducetask.patch, HADOOP-3366_0_20080605.patch,
> This is intended to be a meta-issue to track various improvements to shuffle/merge in
the reducer.

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