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Posted to mapreduce-issues@hadoop.apache.org by "Vinod Kumar Vavilapalli (Updated) (JIRA)" <ji...@apache.org> on 2012/02/05 23:55:59 UTC

[jira] [Updated] (MAPREDUCE-3813) RackResolver should maintain a cache to avoid repetitive lookups.

     [ https://issues.apache.org/jira/browse/MAPREDUCE-3813?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Vinod Kumar Vavilapalli updated MAPREDUCE-3813:
-----------------------------------------------

          Description: With the current code, during task creation, we repeatedly resolve hosts and RackResolver doesn't cache any of the results. Caching will improve performance.
    Affects Version/s: 0.23.0
        Fix Version/s: 0.23.1
             Assignee: Vinod Kumar Vavilapalli
    
> RackResolver should maintain a cache to avoid repetitive lookups.
> -----------------------------------------------------------------
>
>                 Key: MAPREDUCE-3813
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3813
>             Project: Hadoop Map/Reduce
>          Issue Type: Sub-task
>          Components: mrv2, performance
>    Affects Versions: 0.23.0
>            Reporter: Vinod Kumar Vavilapalli
>            Assignee: Vinod Kumar Vavilapalli
>             Fix For: 0.23.1
>
>
> With the current code, during task creation, we repeatedly resolve hosts and RackResolver doesn't cache any of the results. Caching will improve performance.

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