You are viewing a plain text version of this content. The canonical link for it is here.

Posted to issues@tajo.apache.org by "Hyunsik Choi (JIRA)" <ji...@apache.org> on 2015/09/02 03:46:45 UTC

[jira] [Commented] (TAJO-1722) Even distribution of intermediate data for join queries

    [ https://issues.apache.org/jira/browse/TAJO-1722?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14726567#comment-14726567 ] 

Hyunsik Choi commented on TAJO-1722:
------------------------------------

This issue does not seem to be critical in 0.11.0 release. If you didn't start this issues, it would be better if you reschedule this issue.

> Even distribution of intermediate data for join queries
> -------------------------------------------------------
>
>                 Key: TAJO-1722
>                 URL: https://issues.apache.org/jira/browse/TAJO-1722
>             Project: Tajo
>          Issue Type: Improvement
>          Components: distributed query plan
>            Reporter: Jihoon Son
>            Assignee: Jihoon Son
>             Fix For: 0.11.0
>
>
> Data skew is one of the most important problems which affects to the query performance in distributed systems. To do handle this problem, we have used an algorithm for evenly distributing intermediate data for aggregation.
> This ticket is to apply our algorithm for join queries, too.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)