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Posted to issues@tajo.apache.org by "Jinho Kim (JIRA)" <ji...@apache.org> on 2014/03/04 06:13:20 UTC

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

Jinho Kim created TAJO-647:
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             Summary: 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


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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