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https://issues.apache.org/jira/browse/HDFS-814?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12793402#action_12793402
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dhruba borthakur commented on HDFS-814:
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Can this be added to 0.21 as well?
> Add an api to get the visible length of a DFSDataInputStream.
> -------------------------------------------------------------
>
> Key: HDFS-814
> URL: https://issues.apache.org/jira/browse/HDFS-814
> Project: Hadoop HDFS
> Issue Type: New Feature
> Components: hdfs client
> Reporter: Tsz Wo (Nicholas), SZE
> Assignee: Tsz Wo (Nicholas), SZE
> Fix For: 0.21.0, 0.22.0
>
> Attachments: h814_20091221.patch
>
>
> Hflush guarantees that the bytes written before are visible to the new
> readers. However, there is no way to get the length of the visible bytes.
> The visible length is useful in some applications like SequenceFile.
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