Additional performance improvement to chooseTarget
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Key: HADOOP-1155
URL: https://issues.apache.org/jira/browse/HADOOP-1155
Project: Hadoop
Issue Type: Improvement
Components: dfs
Affects Versions: 0.12.2
Reporter: Hairong Kuang
Assigned To: Hairong Kuang
Fix For: 0.13.0
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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