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https://issues.apache.org/jira/browse/HADOOP-2371?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12568376#action_12568376
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Tsz Wo (Nicholas), SZE commented on HADOOP-2371:
------------------------------------------------
Below are my comments:
In "Understanding the Implementation",
- ... Block files on the data nodes ...
"Block files" might be confussing. It might be better to use "blocks".
In "Changes to the File System API"
- NotPermittedException should be AccessControlException
- mkdirs(...) is also a new methods
- create(...) can only create files. Directories are created by mkdir(...).
In "Changes to the Application Shell"
- The usages for chown is
{code}-chown [-R] [OWNER][:[GROUP]] PATH...
{code}
- id is not a command in hadoop
- Currently, we have ls and lsr but not ls [-R]
In "Configuration Parameters"
- The value for dfs.permissions is either true or false.
> Candidate user guide for permissions feature of Hadoop DFS
> ----------------------------------------------------------
>
> Key: HADOOP-2371
> URL: https://issues.apache.org/jira/browse/HADOOP-2371
> Project: Hadoop Core
> Issue Type: New Feature
> Components: dfs
> Affects Versions: 0.16.0
> Reporter: Robert Chansler
> Assignee: Robert Chansler
> Fix For: 0.16.1
>
> Attachments: hadoopPerm.patch, hdfs_permissions_guide.html
>
>
> This feature introduces a POSIX-like permissions model for DFS in Hadoop
> 0.16. The user guide describes the behavior users of DFS will experience. In
> this release, the user identity model is very elementary: you are who your
> host says you are. It is understood that this is not "secure" in any
> meaningful sense, but rather the permissions model allows a cooperative
> community to share file system resources in an organized fashion. The user
> identity model will evolve in the coming months.
> As mentioned in the draft, the content of the guide will be incorporated into
> the regular Hadoop documentation from Forrest. This document is being
> published as an early preview.
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