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Posted to issues@hive.apache.org by "tangyun (JIRA)" <ji...@apache.org> on 2019/07/10 04:26:00 UTC

[jira] [Commented] (HIVE-21978) mr data skew while druid handler indexing data

    [ https://issues.apache.org/jira/browse/HIVE-21978?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16881718#comment-16881718 ] 

tangyun commented on HIVE-21978:
--------------------------------

{{modify partitioning key from basing on floor(1/rand) % targetShardsPerGranularity to on floor(targetShardsPerGranularity * rand) % targetShardsPerGranularity ,which is Linear transformation}}

> mr data skew while druid handler indexing data
> ----------------------------------------------
>
>                 Key: HIVE-21978
>                 URL: https://issues.apache.org/jira/browse/HIVE-21978
>             Project: Hive
>          Issue Type: Improvement
>          Components: Druid integration
>    Affects Versions: 2.3.2, 3.1.1
>            Reporter: tangyun
>            Assignee: tangyun
>            Priority: Major
>         Attachments: optimized_algorithm.png, origin_algorithm.png
>
>




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