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Posted to issues@tajo.apache.org by "Hyunsik Choi (JIRA)" <ji...@apache.org> on 2014/09/19 16:39:36 UTC

[jira] [Assigned] (TAJO-1041) Change tuple-at-a-time execution model to block iteration.

     [ https://issues.apache.org/jira/browse/TAJO-1041?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Hyunsik Choi reassigned TAJO-1041:
----------------------------------

    Assignee: Hyunsik Choi

> Change tuple-at-a-time execution model to block iteration.
> ----------------------------------------------------------
>
>                 Key: TAJO-1041
>                 URL: https://issues.apache.org/jira/browse/TAJO-1041
>             Project: Tajo
>          Issue Type: Improvement
>            Reporter: Hyunsik Choi
>            Assignee: Hyunsik Choi
>              Labels: block_iteration
>
> Currently, our physical executor is based on a tuple-at-a-time model. It is a traditional model and is well known that it is not inefficient in terms of CPU costs.
> Also, I think that we can design integrated interface for row block with considering row block and vectorized row block. I'll add some possibility to extend row block iteration model to be vectorized.
> This is an umbrella issue, which is to change current execution model to block iteration model.



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