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