Refactor double-buffering code out of JournalManagers
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Key: HDFS-2212
URL: https://issues.apache.org/jira/browse/HDFS-2212
Project: Hadoop HDFS
Issue Type: Improvement
Components: name-node
Affects Versions: 0.23.0
Reporter: Todd Lipcon
Assignee: Todd Lipcon
Fix For: 0.23.0
This is a small cleanup that makes EditLogFileOutputStream and
EditLogBackupOutputStream more consistent with each other on how they buffer
edits. It simply refactors the double-buffering behavior into a new class.
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