http://git-wip-us.apache.org/repos/asf/hadoop/blob/b64a3064/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/sps/BlockStorageMovementNeeded.java
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http://git-wip-us.apache.org/repos/asf/hadoop/blob/0b71ea21/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/sps/TestStoragePolicySatisfierWithStripedFile.java
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http://git-wip-us.apache.org/repos/asf/hadoop/blob/e36384a4/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestStoragePolicySatisfier.java
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