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https://issues.apache.org/jira/browse/HDFS-3960?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13487141#comment-13487141
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Sanjay Radia commented on HDFS-3960:
------------------------------------

bq.  Would it be useful to pass file length from the client, when it calls 
namenode.fsync()?

Good idea konstantine. 
 

                
> Snapshot of Being Written Files
> -------------------------------
>
>                 Key: HDFS-3960
>                 URL: https://issues.apache.org/jira/browse/HDFS-3960
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>            Reporter: Tsz Wo (Nicholas), SZE
>            Assignee: Tsz Wo (Nicholas), SZE
>
> Here is a design question: Suppose there is a being written file when a 
> snapshot is being taken.  What should the length of the file be shown in the 
> snapshot?  In other words, how to determine the length of being written file 
> when a snapshot is being taken?

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