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From "Hyunsik Choi (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (TAJO-181) Improvmemt disk scheduler policies for straggler disk
Date Sat, 14 Sep 2013 08:45:51 GMT

     [ https://issues.apache.org/jira/browse/TAJO-181?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Hyunsik Choi updated TAJO-181:
------------------------------

    Summary: Improvmemt disk scheduler policies for straggler disk  (was: Improvmemt allocation
policies empty disk scheduler)
    
> Improvmemt disk scheduler policies for straggler disk
> -----------------------------------------------------
>
>                 Key: TAJO-181
>                 URL: https://issues.apache.org/jira/browse/TAJO-181
>             Project: Tajo
>          Issue Type: Improvement
>          Components: storage
>    Affects Versions: 0.2-incubating
>            Reporter: hyoungjunkim
>            Assignee: hyoungjunkim
>            Priority: Minor
>         Attachments: TAJO-181.patch
>
>
> Current new StorageManager assigns to DiskScanScheduler with disk id regardless of each
DiskScanScheduler's queue size. This policy is the cause of poor performance. 
> If some DiskScanScheduler is empty, the DiskScanScheduler is assigned a priority.

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