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https://issues.apache.org/jira/browse/HDFS-4704?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13638393#comment-13638393
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Daryn Sharp commented on HDFS-4704:
-----------------------------------

This would fit nicely into adding xattr support for hdfs.  If we are going to 
add a attribute, we may as well make it extensible for future attributes.
                
> Add a transient flag to file so that transient files won't be included in any 
> snapshot
> --------------------------------------------------------------------------------------
>
>                 Key: HDFS-4704
>                 URL: https://issues.apache.org/jira/browse/HDFS-4704
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: namenode
>            Reporter: Tsz Wo (Nicholas), SZE
>            Assignee: Tsz Wo (Nicholas), SZE
>
> See the description HDFS-4529.  We are going to implement (4) shown below:
> (4) mark the files with a new transient flag in HDFS. The files with the new 
> flag will not be included in any snapshot. Then, concat could remove the 
> files as usual.

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