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From "Amareshwari Sriramadasu (JIRA)" <j...@apache.org>
Subject [jira] Commented: (MAPREDUCE-1354) Incremental enhancements to the JobTracker for better scalability
Date Fri, 26 Mar 2010 10:54:27 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-1354?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12850078#action_12850078
] 

Amareshwari Sriramadasu commented on MAPREDUCE-1354:
----------------------------------------------------

Shall we do the optimizations suggested at [comment|https://issues.apache.org/jira/browse/MAPREDUCE-1354?focusedCommentId=12834139&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#action_12834139]
as part of the trunk patch? 
Or raise a jira to do the same?

> Incremental enhancements to the JobTracker for better scalability
> -----------------------------------------------------------------
>
>                 Key: MAPREDUCE-1354
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1354
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: jobtracker
>            Reporter: Devaraj Das
>            Assignee: Arun C Murthy
>            Priority: Critical
>         Attachments: mapreduce-1354--2010-03-10.patch, MAPREDUCE-1354_yhadoop20.patch,
MAPREDUCE-1354_yhadoop20.patch, MAPREDUCE-1354_yhadoop20.patch, MAPREDUCE-1354_yhadoop20.patch,
MAPREDUCE-1354_yhadoop20.patch, MAPREDUCE-1354_yhadoop20.patch, MAPREDUCE-1354_yhadoop20.patch,
mr-1354-y20.patch
>
>
> It'd be nice to have the JobTracker object not be locked while accessing the HDFS for
reading the jobconf file and while writing the jobinfo file in the submitJob method. We should
see if we can avoid taking the lock altogether.

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