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https://issues.apache.org/jira/browse/HDFS-8944?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14728391#comment-14728391
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Colin Patrick McCabe commented on HDFS-8944:
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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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