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https://issues.apache.org/jira/browse/HADOOP-1900?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12542599
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Sameer Paranjpye commented on HADOOP-1900:
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> But I don't see the importance of faster heartbeats on faster hardware, 
> especially if it adds complexity to the code.

+1

> the heartbeat and task event queries interval should be set dynamically by 
> the JobTracker
> -----------------------------------------------------------------------------------------
>
>                 Key: HADOOP-1900
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1900
>             Project: Hadoop
>          Issue Type: Improvement
>          Components: mapred
>            Reporter: Owen O'Malley
>            Assignee: Amareshwari Sri Ramadasu
>         Attachments: patch-1900.txt, patch-1900.txt
>
>
> The JobTracker should scale the intervals that the TaskTrackers use to 
> contact it dynamically, based on how the busy it is and the size of the 
> cluster.

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