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https://issues.apache.org/jira/browse/HADOOP-1149?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12487326
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Hadoop QA commented on HADOOP-1149:
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+1, because
http://issues.apache.org/jira/secure/attachment/12354802/HADOOP-1149.patch
applied and successfully tested against trunk revision
http://svn.apache.org/repos/asf/lucene/hadoop/trunk/526215. Results are at
http://lucene.zones.apache.org:8080/hudson/job/Hadoop-Patch
> DFS Scalability: high cpu usage in addStoredBlock
> -------------------------------------------------
>
> Key: HADOOP-1149
> URL: https://issues.apache.org/jira/browse/HADOOP-1149
> Project: Hadoop
> Issue Type: Bug
> Components: dfs
> Reporter: dhruba borthakur
> Assigned To: Raghu Angadi
> Fix For: 0.13.0
>
> Attachments: HADOOP-1149.patch
>
>
> I have seen addStoredBlock() consume lots of CPU. One possible cause is that
> it invokes proccessOverReplicatedBlock. The logic to find and purge
> over-replicated blocks can be done much less often.
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