hive-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Chao (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-7503) Support Hive's multi-table insert query with Spark [Spark Branch]
Date Fri, 05 Sep 2014 20:34:28 GMT

     [ https://issues.apache.org/jira/browse/HIVE-7503?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Chao updated HIVE-7503:
-----------------------
    Attachment: HIVE-7503.3-spark.patch

Addressing comments from RB. Also, trying to make the tester happy by adding a dependency
task.

The task is for multi-table insertion. However, with current implementation, it is generated
even in cases that are not multi-table insertion. We may open a separate JIRA for this minor
issue.

> Support Hive's multi-table insert query with Spark [Spark Branch]
> -----------------------------------------------------------------
>
>                 Key: HIVE-7503
>                 URL: https://issues.apache.org/jira/browse/HIVE-7503
>             Project: Hive
>          Issue Type: Sub-task
>          Components: Spark
>            Reporter: Xuefu Zhang
>            Assignee: Chao
>              Labels: spark-m1
>         Attachments: HIVE-7503.1-spark.patch, HIVE-7503.2-spark.patch, HIVE-7503.3-spark.patch
>
>
> For Hive's multi insert query (https://cwiki.apache.org/confluence/display/Hive/LanguageManual+DML),
there may be an MR job for each insert.  When we achieve this with Spark, it would be nice
if all the inserts can happen concurrently.
> It seems that this functionality isn't available in Spark. To make things worse, the
source of the insert may be re-computed unless it's staged. Even with this, the inserts will
happen sequentially, making the performance suffer.
> This task is to find out what takes in Spark to enable this without requiring staging
the source and sequential insertion. If this has to be solved in Hive, find out an optimum
way to do this.



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

Mime
View raw message