Arpit Agarwal created HDFS-8457:
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             Summary: Refactor FsDatasetSpi to pull up HDFS-agnostic 
functionality into parent interface
                 Key: HDFS-8457
                 URL: https://issues.apache.org/jira/browse/HDFS-8457
             Project: Hadoop HDFS
          Issue Type: Sub-task
          Components: datanode
            Reporter: Arpit Agarwal
            Assignee: Arpit Agarwal


FsDatasetSpi can be split up into HDFS-specific and HDFS-agnostic parts. The 
HDFS-specific parts can continue to be retained in FsDataSpi while those 
relating to volume management, block pools and upgrade can be moved to a parent 
interface.

There will be minimal net change to FsDatasetSpi.



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