fanluo created HDFS-17887:
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Summary: Avoid slow disks datanode when reading data
Key: HDFS-17887
URL: https://issues.apache.org/jira/browse/HDFS-17887
Project: Hadoop HDFS
Issue Type: Improvement
Reporter: fanluo
Assignee: fanluo
During HDFS read operations, replicas on slow disks should be deprioritized so
that replicas on healthy disks are preferred
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