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From "Owen O'Malley (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-1194) map output should not do block level compression
Date Wed, 04 Apr 2007 18:10:32 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-1194?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12486724
] 

Owen O'Malley commented on HADOOP-1194:
---------------------------------------

+1

> map output should not do block level compression
> ------------------------------------------------
>
>                 Key: HADOOP-1194
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1194
>             Project: Hadoop
>          Issue Type: Improvement
>          Components: mapred
>    Affects Versions: 0.12.2
>            Reporter: Runping Qi
>         Assigned To: Arun C Murthy
>             Fix For: 0.13.0
>
>         Attachments: HADOOP-1194_20070403_1.patch
>
>
> If the user sets to compress the map output, the compression style should be record level,
not block level, since using block level compression for map outputs causes performance degragation
significantly.

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