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https://issues.apache.org/jira/browse/HADOOP-2729?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Edward J. Yoon reassigned HADOOP-2729:
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Assignee: (was: Edward J. Yoon)
mis-click.
> Rack level copy of map outputs
> ------------------------------
>
> Key: HADOOP-2729
> URL: https://issues.apache.org/jira/browse/HADOOP-2729
> Project: Hadoop Core
> Issue Type: Improvement
> Components: mapred
> Reporter: Amar Kamat
>
> In case of maps taking of lot of time to complete, a rack level copy of the
> map output can be maintained so that incase of master node for that map goes
> down the other copy can be served. This will be useful since re-executing the
> map can be time consuming and rack-level copy is much cheaper than
> network-level copy.
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