Sho Shimauchi created HDFS-3552:
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Summary: change the placement policy without restarting NameNode
Key: HDFS-3552
URL: https://issues.apache.org/jira/browse/HDFS-3552
Project: Hadoop HDFS
Issue Type: New Feature
Reporter: Sho Shimauchi
Pluggable placement policy was introduced into 0.21 as HDFS-385, but it would
be more useful if user could change the placement policy without restarting
NameNode.
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