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https://issues.apache.org/jira/browse/HADOOP-1194?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Runping Qi updated HADOOP-1194:
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          Component/s: mapred
    Affects Version/s: 0.12.2

> map output should not do block level compression
> ------------------------------------------------
>
>                 Key: HADOOP-1194
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1194
>             Project: Hadoop
>          Issue Type: Bug
>          Components: mapred
>    Affects Versions: 0.12.2
>            Reporter: Runping Qi
>
> 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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