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From "Hyunsik Choi (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (TAJO-314) Make TaskScheduler be pluggable
Date Tue, 19 Nov 2013 05:45:21 GMT

    [ https://issues.apache.org/jira/browse/TAJO-314?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13826219#comment-13826219
] 

Hyunsik Choi commented on TAJO-314:
-----------------------------------

The main reason why the storage manager uses handler names and a map to indicate an actual
class name is to enable users to not specify very long canonical class names within a SQL
statement. However, for scheduler, I think that just a class name may be enough. Also, I would
like to suggest 'tajo.querymaster.task-scheduler.class' because TaskScheduler works in querymaster.

I'll continue to review the remain parts.

> Make TaskScheduler be pluggable
> -------------------------------
>
>                 Key: TAJO-314
>                 URL: https://issues.apache.org/jira/browse/TAJO-314
>             Project: Tajo
>          Issue Type: Improvement
>          Components: master
>            Reporter: Jihoon Son
>            Assignee: Jihoon Son
>             Fix For: 0.8-incubating
>
>         Attachments: TAJO-314.patch
>
>
> The task scheduler can be changed according to the task scheduling algorithm, the locality
policy of the storage, and so on.
> Thus, we need to improve the task scheduler interface to be pluggable.



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