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From "Arun C Murthy (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-1851) Map output compression codec cannot be set independently of job output compression codec
Date Thu, 27 Sep 2007 06:38:50 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-1851?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12530641
] 

Arun C Murthy commented on HADOOP-1851:
---------------------------------------

As Riccardo says we clearly need another configuration property... how about:

Map Outputs:
mapred.map.output.compression.{type|codec}
JobConf.{get|set}MapOutputCompression{Type|Codec}

Job Outputs:
mapred.output.compression.{type|codec}
JobConf.{get|set}OutputCompression{Type|Codec}

That's the easy bit, however I think that this will snow-ball into a large-ish patch since
this will entail hunting down all {{OutputFormat}} implementations and ensuring that they
use mapred.output.compression.{type|codec} properties... clearly something we *have* to fix.
Of course, I'll ensure this is clearly documented for folks who write their own {{OutputFormat}}s.

> Map output compression codec cannot be set independently of job output compression codec
> ----------------------------------------------------------------------------------------
>
>                 Key: HADOOP-1851
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1851
>             Project: Hadoop
>          Issue Type: Bug
>          Components: mapred
>    Affects Versions: 0.14.1
>            Reporter: Riccardo
>            Assignee: Arun C Murthy
>
> The property "mapred.output.compression.codec" is used when setting and getting the map
output compression codec in JobConf, thus making it impossible to use a different codec for
map outputs and overall job outputs.

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