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Posted to dev@hama.apache.org by "Tommaso Teofili (JIRA)" <ji...@apache.org> on 2012/10/28 08:15:15 UTC

[jira] [Resolved] (HAMA-660) Make item cost calculation consistent in GD BSP

     [ https://issues.apache.org/jira/browse/HAMA-660?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tommaso Teofili resolved HAMA-660.
----------------------------------

    Resolution: Fixed
      Assignee: Tommaso Teofili
    
> Make item cost calculation consistent in GD BSP
> -----------------------------------------------
>
>                 Key: HAMA-660
>                 URL: https://issues.apache.org/jira/browse/HAMA-660
>             Project: Hama
>          Issue Type: Improvement
>    Affects Versions: 0.5.0
>            Reporter: Tommaso Teofili
>            Assignee: Tommaso Teofili
>             Fix For: 0.6.0
>
>
> Cost per item is calculated without knowing the total number of items which is ok from an efficiency point of view but makes plugging of new cost functions bug prone since the total cost is then always divided by the number of items.
> It'd be good to have a 0th superstep where total number of items is read and then it's used in CostFunction#calculateCostPerItem

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