Modify or add a new block-volume device choosing policy that looks at free space
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Key: HDFS-1804
URL: https://issues.apache.org/jira/browse/HDFS-1804
Project: Hadoop HDFS
Issue Type: New Feature
Components: data-node
Reporter: Harsh J Chouraria
Priority: Minor
Fix For: 0.23.0
HDFS-1120 introduced pluggable block-volume choosing policies, but still
carries the vanilla RoundRobin as its default.
An additional implementation that also takes into consideration the free space
remaining on the disk (or other params) should be a good addition as an
alternative to vanilla RR.
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