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From "Robert Chansler (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-5572) The map progress value should have a separate phase for doing the final sort.
Date Fri, 09 Oct 2009 18:09:31 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-5572?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Robert Chansler updated HADOOP-5572:
------------------------------------

     Description: 
Currently, the final spill and sort doesn't record any progress while it runs, leading to
the perception that the map is done, but "stuck".

This patch reserves 33.3% of map task's progress to sort by dividing map task in to 2 phases.
Also makes the progress of sort phase(merges) work, both in map side and reduce side.

  was:Currently, the final spill and sort doesn't record any progress while it runs, leading
to the perception that the map is done, but "stuck".

    Release Note:   (was: This patch reserves 33.3% of map task's progress to sort by dividing
map task in to 2 phases. Also makes the progress of sort phase(merges) work, both in map side
and reduce side.)

Editorial pass over all release notes prior to publication of 0.21.

> The map progress value should have a separate phase for doing the final sort.
> -----------------------------------------------------------------------------
>
>                 Key: HADOOP-5572
>                 URL: https://issues.apache.org/jira/browse/HADOOP-5572
>             Project: Hadoop Common
>          Issue Type: Improvement
>            Reporter: Owen O'Malley
>            Assignee: Ravi Gummadi
>             Fix For: 0.21.0
>
>         Attachments: HADOOP-5572.patch, HADOOP-5572.v1.1.patch, HADOOP-5572.v1.2.patch,
HADOOP-5572.v1.3.patch, HADOOP-5572.v1.4.patch, HADOOP-5572.v1.patch
>
>
> Currently, the final spill and sort doesn't record any progress while it runs, leading
to the perception that the map is done, but "stuck".
> This patch reserves 33.3% of map task's progress to sort by dividing map task in to 2
phases. Also makes the progress of sort phase(merges) work, both in map side and reduce side.

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