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

Posted to mapreduce-issues@hadoop.apache.org by "Joseph Doss (Updated) (JIRA)" <ji...@apache.org> on 2012/04/09 14:03:21 UTC

[jira] [Updated] (MAPREDUCE-4126) This is a fix both for oracle support and managing DB splits in general.

     [ https://issues.apache.org/jira/browse/MAPREDUCE-4126?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Joseph Doss updated MAPREDUCE-4126:
-----------------------------------

    Attachment: hadoop.dbinputformat.query.split.patch.patch
    
> This is a fix both for oracle support and managing DB splits in general.
> ------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-4126
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4126
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: performance
>    Affects Versions: 1.0.0
>         Environment: Redhat 6.1 x86_64 
>            Reporter: Joseph Doss
>              Labels: hadoop, newbie, patch
>             Fix For: 1.0.0
>
>         Attachments: hadoop.dbinputformat.query.split.patch.patch
>
>
> This is and addition to an older patch that addressed oracle support. We found that in large result sets, the map reduce was both splitting the results ( as expected ) and running a duplicate ( full result set ) on one node, resulting in a long runtime that should have been reduced by splitting. 

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira