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From "Arun C Murthy (JIRA)" <j...@apache.org>
Subject [jira] Commented: (MAPREDUCE-722) More slots are getting reserved for HiRAM job tasks then required
Date Tue, 07 Jul 2009 16:54:14 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-722?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12728192#action_12728192
] 

Arun C Murthy commented on MAPREDUCE-722:
-----------------------------------------

+1 for the patch and not relying on CapacityScheduler.TaskSchedulingMgr.hasSpeculativeTask
which needs to be fixed anyway (MAPREDUCE-725).

> More slots are getting reserved for HiRAM job tasks then required
> -----------------------------------------------------------------
>
>                 Key: MAPREDUCE-722
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-722
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: contrib/capacity-sched
>         Environment: Cluster MR capacity=248/248 Map slot size=1500 mb and  reduce slot
size=2048 mb. Total number of nodes=124
> 4 queues each having Capacity=25% User Limit=100%.
>            Reporter: Karam Singh
>            Assignee: Vinod K V
>         Attachments: MAPREDUCE-722.1.txt, MAPREDUCE-722.txt
>
>
> Submitted a normal job with map=124=reduces
> After submitted High RAM with maps=31=reduces map.memory=1800 reduce.memory=2800
> Again 3 job maps=124=reduces
> total of 248 slots were reserved for both maps and reduces for High Job which much higher
then required.
> Is observed in Hadoop 0.20.0

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