HuangTao created HDFS-15260:
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Summary: Change from List to Set to improve the chooseTarget
performance
Key: HDFS-15260
URL: https://issues.apache.org/jira/browse/HDFS-15260
Project: Hadoop HDFS
Issue Type: Improvement
Components: namenode
Reporter: HuangTao
Assignee: HuangTao
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