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From "Milind Bhandarkar (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HDFS-1113) Allow users with write access to a directory to change ownership of its subdirectories/files
Date Tue, 27 Apr 2010 21:45:36 GMT

    [ https://issues.apache.org/jira/browse/HDFS-1113?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12861563#action_12861563
] 

Milind Bhandarkar commented on HDFS-1113:
-----------------------------------------

One way to think about ownership / quota etc attributes (metadata) is that it is data in the
parent directory, so if I can write to a parent directory, I should be able to change the
attributes of files / subdirectories in that directory.

In posix model, these attributes are inode attributes (which makes sense, given that posix
supports hardlinks).

> Allow users with write access to a directory to change ownership of its subdirectories/files
> --------------------------------------------------------------------------------------------
>
>                 Key: HDFS-1113
>                 URL: https://issues.apache.org/jira/browse/HDFS-1113
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>          Components: name-node
>         Environment: All
>            Reporter: Milind Bhandarkar
>            Assignee: Sanjay Radia
>
> owner and group of a file/directory, and namespace/diskspace quota for a directory are
mutable attributes. If I have writable access to a directory, say /team/MyTeam, and if there
are subdirectories underneath, such as /team/MyTeam/TeamMember1, /team/MyTeam/TeamMember2,
then I should be able to chown, chgrp, setQuota, clrQuota on TeamMemeber{1|2} subdirectories.
Currently in HDFS (and in Posix), it requires me to be a superuser to perform these operations.

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