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Posted to issues@kylin.apache.org by "kangkaisen (JIRA)" <ji...@apache.org> on 2017/02/10 09:45:42 UTC

[jira] [Commented] (KYLIN-2135) Enlarge FactDistinctColumns reducer number

    [ https://issues.apache.org/jira/browse/KYLIN-2135?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15861001#comment-15861001 ] 

kangkaisen commented on KYLIN-2135:
-----------------------------------

The IT has covered  KYLIN-2135.

> Enlarge FactDistinctColumns reducer number
> ------------------------------------------
>
>                 Key: KYLIN-2135
>                 URL: https://issues.apache.org/jira/browse/KYLIN-2135
>             Project: Kylin
>          Issue Type: Improvement
>          Components: Job Engine
>    Affects Versions: v1.5.4.1
>            Reporter: kangkaisen
>            Assignee: kangkaisen
>             Fix For: v2.0.0
>
>         Attachments: KYLIN-2135.patch, new.png, old.png
>
>
> When the hive table has billions of rows and use global dictionary for precise count distinct measures, the  {{Extract Fact Table Distinct Columns}} job will run o long time.
> So we could use more reducer to deal with the one column.



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