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https://issues.apache.org/jira/browse/HDFS-290?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hairong Kuang resolved HDFS-290.
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Resolution: Later
> Additional performance improvement to chooseTarget
> --------------------------------------------------
>
> Key: HDFS-290
> URL: https://issues.apache.org/jira/browse/HDFS-290
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Hairong Kuang
> Assignee: Hairong Kuang
> Attachments: rackMap.patch, rackMap1.patch, rackMap2.patch,
> rackMap3.patch
>
>
> A few additional thoughts to improve the performance of chooseTarget:
> 1. Reduce the # of calls to getDistance in sortedByDistance
> 2. Improve the performance of getNode by adding a rack name to rack node map
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