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Date: Fri, 16 Jan 2009 15:03:59 -0800 (PST)
From: "Jakob Homan (JIRA)" <jira@apache.org>
To: core-dev@hadoop.apache.org
Subject: [jira] Updated: (HADOOP-3953) Sticky bit for directories
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     [ https://issues.apache.org/jira/browse/HADOOP-3953?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jakob Homan updated HADOOP-3953:
--------------------------------

    Release Note: Implement sticky bit for directories in HDFS.   (was: Implement sticky bit for directories in HDFS.  Is incompatible as prior versions of Hadoop will not be able to read the persisted mode value.)
    Hadoop Flags: [Incompatible change, Reviewed]  (was: [Reviewed, Incompatible change])

> Sticky bit for directories
> --------------------------
>
>                 Key: HADOOP-3953
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3953
>             Project: Hadoop Core
>          Issue Type: Improvement
>          Components: dfs
>            Reporter: Koji Noguchi
>            Assignee: Jakob Homan
>             Fix For: 0.21.0
>
>         Attachments: HADOOP-3953.patch, HADOOP-3953.patch, HADOOP-3953.patch, HADOOP-3953.patch
>
>
> Our users (especially Pig) heavily use /tmp for temporary storage. 
> Permission are set to 777.
> However, this means any users can rename and also remove (by moving to .Trash) other users directories and files.
> It would be nice if we can have a sticky bit like unix. 
> Copy&Pasted from manpage.
> STICKY DIRECTORIES
>        When  the  sticky  bit  is set on a directory, files in that directory may be unlinked or renamed only by
>        root or their owner.  Without the sticky bit, anyone able to write to the directory can delete or  rename
>        files.  The sticky bit is commonly found on directories, such as /tmp, that are world-writable.

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