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https://issues.apache.org/jira/browse/NIFI-940?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15869261#comment-15869261
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Joseph Witt commented on NIFI-940:
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We can improve the efficiency/overhead on cases as necessary.  For something 
like this though I am highly skeptical that is a problem.  If we're talking 
file IO (as is the case here) we're already way faster/more efficient than any 
file IO case would require.  We also want to be careful about ensuring 
processors are composable/reusable and that stems from them being appropriately 
cohesive.

>From a user POV i do agree that we should update the documentation of these 
>processors to ensure it specifies 'readsAttribute' for filename if it doesn't 
>already and that users can use UpdateAttribute to manipulate it before 
>delivery.

> Expose 'filename' as a Property on PutFile, PutHDFS, PutFTP, PutSFTP, and 
> other Put-esque processors
> ----------------------------------------------------------------------------------------------------
>
>                 Key: NIFI-940
>                 URL: https://issues.apache.org/jira/browse/NIFI-940
>             Project: Apache NiFi
>          Issue Type: Improvement
>          Components: Extensions
>    Affects Versions: 0.3.0
>            Reporter: Michael Kobit
>            Assignee: Andre
>
> Allow a NFM to set the filename to save files as. Should support Expression 
> language, and default to '${filename}' 



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