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From "dhruba borthakur (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-3177) Expose DFSOutputStream.fsync API though the FileSystem interface
Date Mon, 28 Apr 2008 17:49:56 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-3177?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12592855#action_12592855
] 

dhruba borthakur commented on HADOOP-3177:
------------------------------------------

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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