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https://issues.apache.org/jira/browse/TAJO-161?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13806301#comment-13806301
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Jihoon Son commented on TAJO-161:
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+1 for this issue.
It can reduce the number of steps of distributed processing, and thus
significantly improve the performance.
> Optimization for input correlation and output sharing of physical operator
> --------------------------------------------------------------------------
>
> Key: TAJO-161
> URL: https://issues.apache.org/jira/browse/TAJO-161
> Project: Tajo
> Issue Type: New Feature
> Components: physical operator, planner/optimizer
> Reporter: Hyunsik Choi
> Labels: ysmart
>
> See the YSmart presentation material:
> https://skydrive.live.com/view.aspx?resid=B5907D87BB3B44F!445&app=PowerPoint&authkey=!ACManEpA_neVUZI
> If two or more physical operators can share tuple outputs of one child node,
> the YSmart approach can be applied to Tajo.
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