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From "Arun C Murthy (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (MAPREDUCE-782) Use PureJavaCrc32 in mapreduce spills
Date Tue, 25 Sep 2012 18:02:08 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-782?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Arun C Murthy updated MAPREDUCE-782:
------------------------------------

    Fix Version/s:     (was: 1.2.0)
                   1.1.0

I merged this to branch-1.1 too.
                
> Use PureJavaCrc32 in mapreduce spills
> -------------------------------------
>
>                 Key: MAPREDUCE-782
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-782
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: performance
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>            Priority: Minor
>             Fix For: 0.21.0, 1.1.0
>
>         Attachments: MAPREDUCE-782.branch-1.patch, mapreduce-782.txt
>
>
> HADOOP-6148 implemented a Pure Java implementation of CRC32 which performs better than
the built-in one. This issue is to make use of it in the mapred package

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