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From "Owen O'Malley (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-6039) Computing Input Splits on the MR Cluster
Date Mon, 15 Jun 2009 16:50:07 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-6039?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12719638#action_12719638
] 

Owen O'Malley commented on HADOOP-6039:
---------------------------------------

This patch should reintroduce checkInputSplits into org.apache.hadoop.mapreduce.InputFormat.
This method should be documented as *optional*. It will only be invoked if Java code is doing
the submission to detect errors in the user's job configuration, such as missing or read-protected
input directory, before the job is submitted to the cluster.


> Computing Input Splits on the MR Cluster
> ----------------------------------------
>
>                 Key: HADOOP-6039
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6039
>             Project: Hadoop Core
>          Issue Type: New Feature
>          Components: mapred
>            Reporter: Philip Zeyliger
>
> Instead of computing the input splits as part of job submission, Hadoop could have a
separate "job task type" that computes the input splits, therefore allowing that computation
to happen on the cluster.

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