hadoop-common-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Runping Qi (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-3651) When assigning tasks to trackers, the job tracker should try to balance the number of tasks among the available trackers
Date Fri, 27 Jun 2008 17:39:45 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-3651?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12608853#action_12608853
] 

Runping Qi commented on HADOOP-3651:
------------------------------------


There was only one job ever submitted.


> When assigning tasks to trackers, the job tracker should try to balance the number of
tasks among the available trackers
> ------------------------------------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-3651
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3651
>             Project: Hadoop Core
>          Issue Type: Improvement
>          Components: mapred
>    Affects Versions: 0.17.0
>            Reporter: Runping Qi
>
> I encounter a number of situations like this:
> A job tracker has 200 task trackers, each with 2 mapper slots and reducer slots.
> When a job with 200 or fewer reducers was submitted to the job tracker,
> one normally each task tracker will run one reducer.
> Unfortunately, it seems that only  about 1/3 of trackers have one reducer, and 1/3 trackers
don't have reducer, and 1/3 have 2 reducers!

-- 
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