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Posted to issues@tajo.apache.org by "Jinho Kim (JIRA)" <ji...@apache.org> on 2014/03/04 06:19:23 UTC

[jira] [Commented] (TAJO-647) Work unbalance on disk schedule of DefaultScheduler

    [ https://issues.apache.org/jira/browse/TAJO-647?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13919028#comment-13919028 ] 

Jinho Kim commented on TAJO-647:
--------------------------------

Created a review request against branch master in reviewboard 


> Work unbalance on disk schedule of DefaultScheduler 
> ----------------------------------------------------
>
>                 Key: TAJO-647
>                 URL: https://issues.apache.org/jira/browse/TAJO-647
>             Project: Tajo
>          Issue Type: Bug
>          Components: resource manager
>    Affects Versions: 0.8-incubating
>            Reporter: Jinho Kim
>            Assignee: Jinho Kim
>         Attachments: TAJO-647.patch
>
>
> The main problem is that localAllocation does not find next lowest volume. and it will assign to remote in rack.
> We should control the remote tasks.
> * Leaf scheduling priorities
> 1. tasks in a volume of host
> 2. unknown disk, non-splitable in local host
> 3. remote tasks in rack. (consider the remaining tasks)
> 4. random remote tasks. (tail concurrency control of scheduled tasks)



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