You are viewing a plain text version of this content. The canonical link for it is here.

Posted to dev@hive.apache.org by "Namit Jain (JIRA)" <ji...@apache.org> on 2010/12/06 08:14:11 UTC

[jira] Created: (HIVE-1831) Add a option to run task to check map-join possibility in non-local mode

Add a option to run task to check map-join possibility in non-local mode
------------------------------------------------------------------------

                 Key: HIVE-1831
                 URL: https://issues.apache.org/jira/browse/HIVE-1831
             Project: Hive
          Issue Type: Improvement
          Components: Query Processor
            Reporter: Namit Jain
            Assignee: Liyin Tang


In HIVE-1642, we run a local task to figure out if the small table can be held in memory, and then convert the join into a map-join.
However, this can be a good idea for thin clients (which may not have enough memory).

This should be made configurable - where the default can still be to run the task locally on the client machine, but an option
should be added for thin clients, where the task would be run as a map-only task

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.

[jira] Resolved: (HIVE-1831) Add a option to run task to check map-join possibility in non-local mode

Posted by "Namit Jain (JIRA)" <ji...@apache.org>.

     [ https://issues.apache.org/jira/browse/HIVE-1831?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Namit Jain resolved HIVE-1831.
------------------------------

       Resolution: Fixed
    Fix Version/s: 0.7.0
     Hadoop Flags: [Reviewed]

Committed. Thanks Liyin

> Add a option to run task to check map-join possibility in non-local mode
> ------------------------------------------------------------------------
>
>                 Key: HIVE-1831
>                 URL: https://issues.apache.org/jira/browse/HIVE-1831
>             Project: Hive
>          Issue Type: Improvement
>          Components: Query Processor
>            Reporter: Namit Jain
>            Assignee: Liyin Tang
>             Fix For: 0.7.0
>
>
> In HIVE-1642, we run a local task to figure out if the small table can be held in memory, and then convert the join into a map-join.
> However, this can be a good idea for thin clients (which may not have enough memory).
> This should be made configurable - where the default can still be to run the task locally on the client machine, but an option
> should be added for thin clients, where the task would be run as a map-only task

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.