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https://issues.apache.org/jira/browse/HDFS-8898?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15485346#comment-15485346
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Zhe Zhang commented on HDFS-8898:
---------------------------------

Quick note that I'm working on backporting HDFS-10744 to branch-2.7; since this 
change is not in branch-2.7, the overlapping part won't be backported.

If someone plans to backport this to branch-2.7, please remember to add the 
optimization from HDFS-10744.

> Create API and command-line argument to get quota and quota usage without 
> detailed content summary
> --------------------------------------------------------------------------------------------------
>
>                 Key: HDFS-8898
>                 URL: https://issues.apache.org/jira/browse/HDFS-8898
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: fs
>            Reporter: Joep Rottinghuis
>            Assignee: Ming Ma
>             Fix For: 2.8.0, 3.0.0-alpha1
>
>         Attachments: HDFS-8898-2.patch, HDFS-8898-3.patch, HDFS-8898-4.patch, 
> HDFS-8898-5.patch, HDFS-8898-6.patch, HDFS-8898-branch-2.patch, 
> HDFS-8898.patch
>
>
> On large directory structures it takes significant time to iterate through 
> the file and directory counts recursively to get a complete ContentSummary.
> When you want to just check for the quota on a higher level directory it 
> would be good to have an option to skip the file and directory counts.
> Moreover, currently one can only check the quota if you have access to all 
> the directories underneath. For example, if I have a large home directory 
> under /user/joep and I host some files for another user in a sub-directory, 
> the moment they create an unreadable sub-directory under my home I can no 
> longer check what my quota is. Understood that I cannot check the current 
> file counts unless I can iterate through all the usage, but for 
> administrative purposes it is nice to be able to get the current quota 
> setting on a directory without the need to iterate through and run into 
> permission issues on sub-directories.



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