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https://issues.apache.org/jira/browse/HADOOP-3712?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Amar Kamat reassigned HADOOP-3712:
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Assignee: Amar Kamat
> TaskTracker can skip a dfs check on every task launch.
> ------------------------------------------------------
>
> Key: HADOOP-3712
> URL: https://issues.apache.org/jira/browse/HADOOP-3712
> Project: Hadoop Core
> Issue Type: Improvement
> Components: mapred
> Reporter: Amar Kamat
> Assignee: Amar Kamat
>
> When tasktracker gets a new task to run, it queries the namenode to find out
> the job directory _size_. This _size_ is required if the job files are not
> yet localized. But if its already localized then the dfs call gets wasted.
> This will be true for all but 1 tasks that run for a job on a tracker. One
> can avoid it but checking if the job is already localized.
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