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Date: Thu, 14 Feb 2008 14:33:07 -0800 (PST)
From: "Doug Cutting (JIRA)" <jira@apache.org>
To: core-dev@hadoop.apache.org
Subject: [jira] Commented: (HADOOP-2834) Iterator for MapFileOutputFormat
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    [ https://issues.apache.org/jira/browse/HADOOP-2834?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12569119#action_12569119 ] 

Doug Cutting commented on HADOOP-2834:
--------------------------------------

One more nit: the isFile() call in MapFilePathFilter is expensive.  Is it really required?  Isn't checking that the name is "part-" sufficient?

> Iterator for MapFileOutputFormat
> --------------------------------
>
>                 Key: HADOOP-2834
>                 URL: https://issues.apache.org/jira/browse/HADOOP-2834
>             Project: Hadoop Core
>          Issue Type: Improvement
>          Components: mapred
>    Affects Versions: 0.17.0
>            Reporter: Andrzej Bialecki 
>             Fix For: 0.17.0
>
>         Attachments: map-file-v2.patch
>
>
> MapFileOutputFormat produces output data that is sorted locally in each part-NNNNN file - however, there is no easy way to iterate over keys from all parts in a globally ascending order.

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