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https://issues.apache.org/jira/browse/HADOOP-6082?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12721962#action_12721962
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Rodrigo Schmidt commented on HADOOP-6082:
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I think we should make the jobtracker as light as possible. Dhruba's option
sounds a bit better in that sense, since the burden of choosing the
tasktrackers to be decommissioned is pushed to some external tool.
> Elegant decommission of lighty loaded tasktrackers from a map-reduce cluster
> ----------------------------------------------------------------------------
>
> Key: HADOOP-6082
> URL: https://issues.apache.org/jira/browse/HADOOP-6082
> Project: Hadoop Core
> Issue Type: New Feature
> Components: mapred
> Reporter: dhruba borthakur
> Assignee: Namit Jain
>
> There is a need to elegantly move some machines from one map-reduce cluster
> to another. This JIRA is to discuss how to find lightly loaded tasktrackers
> that are candidates for decommissioning and then to elegantly decommission
> them by waiting for existing tasks to finish.
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