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https://issues.apache.org/jira/browse/HDFS-15243?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17069165#comment-17069165
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liuyanyu commented on HDFS-15243:
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Yes, we tend to allow read/write but just prevent delete sub-directories under
the protected directories.
If performance is ok, we even want to protect files from being deleted.
My idea is to check if parent directory is in the protected directories list
when we try to directory , like this.
But this seems to cause performance degradation.
waiting for your advice [~ayushtkn]
!image-2020-03-28-09-23-31-335.png!
> Child directory should not be deleted or renamed if parent directory is a
> protected directory
> ---------------------------------------------------------------------------------------------
>
> Key: HDFS-15243
> URL: https://issues.apache.org/jira/browse/HDFS-15243
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: 3.1.1
> Affects Versions: 3.1.1
> Reporter: liuyanyu
> Priority: Major
> Attachments: image-2020-03-28-09-23-31-335.png
>
>
> HDFS-8983 add fs.protected.directories to support protected directories on
> NameNode. But as I test, when set a parent directory（eg /testA) to
> protected directory, the child directory (eg /testA/testB) still can be
> deleted or renamed. When we protect a directory mainly for protecting the
> data under this directory , So I think the child directory should not be
> delete or renamed if the parent directory is a protected directory.
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