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From "Qinghe Jin (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (MAPREDUCE-295) Jobtracker leaves tasktrackers underutilized
Date Thu, 13 Dec 2012 10:40:15 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-295?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Qinghe Jin updated MAPREDUCE-295:
---------------------------------

    Description: For some workloads, the jobtracker doesn't keep all the slots utilized even
under heavy load.  (was: For some workloads, the jobtracker doesn't keep all the slots utilized
even under heavy load.l;)
    
> Jobtracker leaves tasktrackers underutilized
> --------------------------------------------
>
>                 Key: MAPREDUCE-295
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-295
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>         Environment: 2x HT 2.8GHz Intel Xeon, 3GB RAM, 4x 250GB HD linux boxes, 100 node
cluster
>            Reporter: Khaled Elmeleegy
>         Attachments: hadoop-khaled-tasktracker.10s.uncompress.timeline.pdf, hadoop-khaled-tasktracker.150ms.uncompress.timeline.pdf,
jobtracker20.patch, jobtracker.patch
>
>
> For some workloads, the jobtracker doesn't keep all the slots utilized even under heavy
load.

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