Konstantin Shvachko created HADOOP-17477:
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             Summary: [SBN read] Implement msync() for ViewFS
                 Key: HADOOP-17477
                 URL: https://issues.apache.org/jira/browse/HADOOP-17477
             Project: Hadoop Common
          Issue Type: Improvement
          Components: viewfs
            Reporter: Konstantin Shvachko


We should implement {{FileSystem.mscyn()}} for {{ViewFS}} and 
{{ViewFileSystem}}.
It should call msync() on all volumes for which observer reads are enabled and 
{{dfs.namenode.state.context.enabled = true}}



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