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https://issues.apache.org/jira/browse/TAJO-603?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13945983#comment-13945983
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Hyunsik Choi commented on TAJO-603:
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Min,
Sure, I'll take it :) I also think that it is hard to handle the part due to
lack of comments and not good design.
> Move container allocation from SubQuery down to QueryUnitAttempt
> ----------------------------------------------------------------
>
> Key: TAJO-603
> URL: https://issues.apache.org/jira/browse/TAJO-603
> Project: Tajo
> Issue Type: Sub-task
> Reporter: Min Zhou
> Assignee: Hyunsik Choi
> Fix For: 1.0-incubating
>
> Attachments: schedule.png
>
>
> Tajo currently allocates all of the containers in SubQuery. That make things
> complicated. Both SubQuery and DefaultTaskScheduler should hold a copy of
> allocated containers and running tasks. And the event flow is difficult to
> understand.
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