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https://issues.apache.org/jira/browse/HDFS-8944?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14708801#comment-14708801
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Akira AJISAKA commented on HDFS-8944:
-------------------------------------

Thanks [~rakeshr] for the comment. Updated the release note. I don't think this 
issue breaks backward compatibility because camel case is supported after the 
patch, however, this issue and HADOOP-10901 (Thanks Kengo for the link!) should 
be discussed. Obviously I'm +1 for make them case insensitive for usability.

> Make dfsadmin command options case insensitive
> ----------------------------------------------
>
>                 Key: HDFS-8944
>                 URL: https://issues.apache.org/jira/browse/HDFS-8944
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>            Reporter: Akira AJISAKA
>            Assignee: Akira AJISAKA
>         Attachments: HDFS-8944.001.patch
>
>
> Now dfsadmin command options are case sensitive except allowSnapshot and  
> disallowSnapshot. It would be better to make them case insensitive for 
> usability and consistency.



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