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From "Colin Patrick McCabe (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-8944) Make dfsadmin command options case insensitive
Date Thu, 03 Sep 2015 02:09:46 GMT

    [ https://issues.apache.org/jira/browse/HDFS-8944?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14728391#comment-14728391
] 

Colin Patrick McCabe commented on HDFS-8944:
--------------------------------------------

This seems inconsistent with other UNIX commands.  "LS" is not the same as "Ls", is not the
same as "ls".  This also might create confusion since if people read a tutorial about Hadoop
telling them to use RestoreFailedStorage instead of restoreFailedStorage, it will work with
the new version, but not the old.  Of course, there is nothing in the compatibility policy
preventing us from doing this-- clearly not, otherwise new additions to Hadoop would be impossible.
 But it just seems unnecessary in this case.

I agree that there are a few ambiguous cases.  For example, "metasave" should probably have
been "metaSave" and "refreshNamenodes" should probably have been "refreshNameNodes".  How
about just checking for the few alternatives that are ambiguous, rather than making everything
case-insensistive and allowing in silly things like {{fInAliZeUpGrAdE}}?

> 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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