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From "Karthik Kambatla (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (YARN-23) FairScheduler: FSQueueSchedulable#updateDemand() - potential redundant aggregation
Date Tue, 14 Aug 2012 18:47:38 GMT

     [ https://issues.apache.org/jira/browse/YARN-23?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Karthik Kambatla updated YARN-23:
---------------------------------

    Description: 
In FS, FSQueueSchedulable#updateDemand() limits the demand to maxTasks only after iterating
though all the pools and computing the final demand. 

By checking if the demand has reached maxTasks in every iteration, we can avoid redundant
work, at the expense of one condition check every iteration.

  was:
In FS, PoolSchedulable#updateDemand() limits the demand to maxTasks only after iterating though
all the pools and computing the final demand. 

By checking if the demand has reached maxTasks in every iteration, we can avoid redundant
work, at the expense of one condition check every iteration.

        Summary: FairScheduler: FSQueueSchedulable#updateDemand() - potential redundant aggregation
 (was: FairScheduler: PoolSchedulable#updateDemand() - potential redundant aggregation)
    
> FairScheduler: FSQueueSchedulable#updateDemand() - potential redundant aggregation
> ----------------------------------------------------------------------------------
>
>                 Key: YARN-23
>                 URL: https://issues.apache.org/jira/browse/YARN-23
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: scheduler
>    Affects Versions: 2.1.0-alpha
>            Reporter: Karthik Kambatla
>            Assignee: Karthik Kambatla
>         Attachments: trunk-MR-4518.patch, trunk-MR-4518.patch, YARN-23.patch
>
>
> In FS, FSQueueSchedulable#updateDemand() limits the demand to maxTasks only after iterating
though all the pools and computing the final demand. 
> By checking if the demand has reached maxTasks in every iteration, we can avoid redundant
work, at the expense of one condition check every iteration.

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