Andrew Wang created HDFS-8538:
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Summary: Change the default volume choosing policy to
AvailableSpaceVolumeChoosingPolicy
Key: HDFS-8538
URL: https://issues.apache.org/jira/browse/HDFS-8538
Project: Hadoop HDFS
Issue Type: Improvement
Affects Versions: 2.7.0
Reporter: Andrew Wang
Assignee: Andrew Wang
For datanodes with different sized disks, they almost always want the available
space policy. Users with homogenous disks are unaffected.
Since this code has baked for a while, let's change it to be the default.
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