BELUGA BEHR created HDFS-13958:
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Summary: Miscellaneous Improvements for FsVolumeSpi
Key: HDFS-13958
URL: https://issues.apache.org/jira/browse/HDFS-13958
Project: Hadoop HDFS
Issue Type: Improvement
Components: datanode
Affects Versions: 3.3.0
Reporter: BELUGA BEHR
The work in [HDFS-13947] allowed for using {{ArrayList}} instead of
{{LinkedList}} when scanning DataNode local directories, however the
{{FsVolumeSpi}} implementations were still using (and forcing) {{LinkedList}}.
I propose changing the {{FsVolumeSpi}} signatures to allow for {{Collection}}
instead of {{LinkedList}}. Since I'm looking at the code, I made some small
improvements and check-style fixes.
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