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From "Edward J. Yoon (JIRA)" <j...@apache.org>
Subject [jira] Assigned: (HADOOP-2729) Rack level copy of map outputs
Date Thu, 17 Apr 2008 01:35:21 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-2729?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Edward J. Yoon reassigned HADOOP-2729:
--------------------------------------

    Assignee: Edward J. Yoon

> 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
>            Assignee: Edward J. Yoon
>
> 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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