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From "Rodrigo Schmidt (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-6082) Elegant decommission of lighty loaded tasktrackers from a map-reduce cluster
Date Fri, 19 Jun 2009 19:52:07 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-6082?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12721962#action_12721962
] 

Rodrigo Schmidt commented on HADOOP-6082:
-----------------------------------------

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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