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https://issues.apache.org/jira/browse/HADOOP-3177?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12592855#action_12592855
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dhruba borthakur commented on HADOOP-3177:
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I think it is sufficient (for now) for an application to cast a OutputStream to
a DFSOutputStream and then invoke fsync on it. However, it is better if we
expose this API on the generic FileSystem API so that an application can work
same on all FileSystems.
> Expose DFSOutputStream.fsync API though the FileSystem interface
> ----------------------------------------------------------------
>
> Key: HADOOP-3177
> URL: https://issues.apache.org/jira/browse/HADOOP-3177
> Project: Hadoop Core
> Issue Type: Improvement
> Components: dfs
> Reporter: dhruba borthakur
> Assignee: dhruba borthakur
>
> In the current code, there is a DFSOutputStream.fsync() API that allows a
> client to flush all buffered data to the datanodes and also persist block
> locations on the namenode. This API should be exposed through the generic API
> in the org.hadoop.fs.
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