hadoop-common-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-2399) Input key and value to combiner and reducer should be reused
Date Fri, 28 Mar 2008 12:18:25 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-2399?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12583005#action_12583005

Hudson commented on HADOOP-2399:

Integrated in Hadoop-trunk #444 (See [http://hudson.zones.apache.org/hudson/job/Hadoop-trunk/444/])

> Input key and value to combiner and reducer should be reused
> ------------------------------------------------------------
>                 Key: HADOOP-2399
>                 URL: https://issues.apache.org/jira/browse/HADOOP-2399
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: mapred
>    Affects Versions: 0.15.1
>            Reporter: Owen O'Malley
>            Assignee: Owen O'Malley
>             Fix For: 0.17.0
>         Attachments: 2399-3.patch, 2399-4.patch
> Currently, the input key and value are recreated on every iteration for input to the
combiner and reducer. It would speed up the system substantially if we reused the keys and
values. The down side of doing it, is that it may break applications that count on holding
references to previous keys and values, but I think it is worth doing.

This message is automatically generated by JIRA.
You can reply to this email to add a comment to the issue online.

View raw message