hadoop-mapreduce-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Hong Tang (JIRA)" <j...@apache.org>
Subject [jira] Commented: (MAPREDUCE-801) MAPREDUCE framework should issue warning with too many locations for a split
Date Wed, 12 Aug 2009 16:47:14 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-801?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12742443#action_12742443
] 

Hong Tang commented on MAPREDUCE-801:
-------------------------------------

Yet another solution, which I think is more general, is proposed and a jira MAPREDUCE-841
is created for track it.

> MAPREDUCE framework should issue warning with too many locations for a split
> ----------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-801
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-801
>             Project: Hadoop Map/Reduce
>          Issue Type: New Feature
>            Reporter: Hong Tang
>
> Customized input-format may be buggy and report misleading locations through input-split,
an example of which is PIG-878. When an input split returns too many locations, it would not
only artificially inflate the percentage of data local or rack local maps, but also force
scheduler to use more memory and work harder to conduct task assignment.

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


Mime
View raw message