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Posted to issues@kylin.apache.org by "zhaotianshuo (JIRA)" <ji...@apache.org> on 2016/09/09 06:49:21 UTC

[jira] [Commented] (KYLIN-2004) Make the creating intermediate hive table steps configurable (two options)

    [ https://issues.apache.org/jira/browse/KYLIN-2004?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15476121#comment-15476121 ] 

zhaotianshuo commented on KYLIN-2004:
-------------------------------------

great!  that is what I need too


> Make the creating intermediate hive table steps configurable (two options)
> --------------------------------------------------------------------------
>
>                 Key: KYLIN-2004
>                 URL: https://issues.apache.org/jira/browse/KYLIN-2004
>             Project: Kylin
>          Issue Type: Improvement
>          Components: Job Engine
>    Affects Versions: v1.5.3
>            Reporter: Shaofeng SHI
>            Assignee: Shaofeng SHI
>             Fix For: v1.5.4
>
>
> In 1.5.3 for KYLIN-1677, Kylin changed the steps when pull data from hive as: 1) count the source table 2) create intermediate flat table with redistribution (reducer number is determined by step1)
> This works good for many cases, but may not benefit for case like a view (which joins several tables) as the fact table.
> So it is better to keep the other option: 1) create intermediate flat table 2) count the intermediate table 3) redistribute it based on the output of step 2)
> Plan to make this configurable (system level & cube level).



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