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Posted to common-dev@hadoop.apache.org by "Klaas Bosteels (JIRA)" <ji...@apache.org> on 2009/06/05 10:32:07 UTC

[jira] Commented: (HADOOP-5979) Streaming partitioner should allow command, not just Java class

    [ https://issues.apache.org/jira/browse/HADOOP-5979?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12716535#action_12716535 ] 

Klaas Bosteels commented on HADOOP-5979:
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I think the best approach would be to let the partitioner command take key/value pairs as input (just like the mapper command) and make it output a (new) key for each pair, which then gets hashed to determine the partition number for the pair. Any other thoughts or comments on this?

> Streaming partitioner should allow command, not just Java class
> ---------------------------------------------------------------
>
>                 Key: HADOOP-5979
>                 URL: https://issues.apache.org/jira/browse/HADOOP-5979
>             Project: Hadoop Core
>          Issue Type: Improvement
>          Components: contrib/streaming
>            Reporter: Klaas Bosteels
>
> Since HADOOP-4842 got committed, Streaming allows both commands and Java classes to be specified as mapper, reducer, and combiner, but the {{-partitioner}} option is still limited to Java classes only. Allowing commands to be specified as partitioner as well would greatly improve the flexibility of Streaming programs.

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