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From "Chengxiang Li (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-11082) Support multi edge between nodes in SparkPlan[Spark Branch]
Date Tue, 14 Jul 2015 06:40:04 GMT

     [ https://issues.apache.org/jira/browse/HIVE-11082?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Chengxiang Li updated HIVE-11082:
---------------------------------
    Attachment: HIVE-11082.1-spark.patch

SparkPlan support multi edges between nodes in default, just remove the check during SparkPlan::connect.

But self join/union does not benifit from RDD caching with this patch actually, as self join/union
would set different alia names to the source table, which make the ReduceSinkOperators in
different MapWork do not equals with each other.  

> Support multi edge between nodes in SparkPlan[Spark Branch]
> -----------------------------------------------------------
>
>                 Key: HIVE-11082
>                 URL: https://issues.apache.org/jira/browse/HIVE-11082
>             Project: Hive
>          Issue Type: Sub-task
>          Components: Spark
>            Reporter: Chengxiang Li
>            Assignee: Chengxiang Li
>         Attachments: HIVE-11082.1-spark.patch
>
>
> For Dynamic RDD caching optimization, we found SparkPlan::connect throw exception while
we try to combine 2 works with same child, support multi edge between nodes in SparkPlan would
help to enable dynamic RDD caching in more use cases, like self join and self union.



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