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Posted to common-dev@hadoop.apache.org by "Robert Chansler (JIRA)" <ji...@apache.org> on 2007/12/06 21:55:43 UTC
[jira] Created: (HADOOP-2371) Candidate user guide for permissions
feature of Hadoop DFS
Candidate user guide for permissions feature of Hadoop DFS
----------------------------------------------------------
Key: HADOOP-2371
URL: https://issues.apache.org/jira/browse/HADOOP-2371
Project: Hadoop
Issue Type: New Feature
Components: dfs
Affects Versions: 0.16.0
Reporter: Robert Chansler
Assignee: Robert Chansler
Fix For: 0.16.0
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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[jira] Commented: (HADOOP-2371) Candidate user guide for
permissions feature of Hadoop DFS
Posted by "Tsz Wo (Nicholas), SZE (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HADOOP-2371?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12550706 ]
Tsz Wo (Nicholas), SZE commented on HADOOP-2371:
------------------------------------------------
- User Identity
The commands `whoami` for username and `bash -c groups` for groups are used since they are more portable. Also, almost all the Unix commands using in Hadoop can be found in org.apache.hadoop.fs.ShellCommand. (other Unix command should be moved there later.)
Related jire: HADOOP-2229, HADOOP-2368
- Changes to the Client API
It may be better to call it "Changes to the FileSystem API" since they are defined there. Also, the actual method signatures are
{code}
org.apache.hadoop.fs.FileSystem
public FSDataOutputStream create(Path f,
FsPermission permission,
boolean overwrite,
int bufferSize,
short replication,
long blockSize,
Progressable progress) throws IOException
public void setPermission(Path p, FsPermission permission
) throws IOException
public void setOwner(Path p, String username, String groupname
) throws IOException
public FileStatus getFileStatus(Path f) throws IOException
{code}
Related jire: HADOOP-2288, HADOOP-2381
> Candidate user guide for permissions feature of Hadoop DFS
> ----------------------------------------------------------
>
> Key: HADOOP-2371
> URL: https://issues.apache.org/jira/browse/HADOOP-2371
> Project: Hadoop
> Issue Type: New Feature
> Components: dfs
> Affects Versions: 0.16.0
> Reporter: Robert Chansler
> Assignee: Robert Chansler
> Fix For: 0.16.0
>
> Attachments: Grid_HadoopPermissionsUserGuide1.pdf
>
>
> 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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[jira] Updated: (HADOOP-2371) Candidate user guide for permissions
feature of Hadoop DFS
Posted by "Robert Chansler (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HADOOP-2371?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Robert Chansler updated HADOOP-2371:
------------------------------------
Attachment: Grid_HadoopPermissionsUserGuide1.pdf
First draft
> Candidate user guide for permissions feature of Hadoop DFS
> ----------------------------------------------------------
>
> Key: HADOOP-2371
> URL: https://issues.apache.org/jira/browse/HADOOP-2371
> Project: Hadoop
> Issue Type: New Feature
> Components: dfs
> Affects Versions: 0.16.0
> Reporter: Robert Chansler
> Assignee: Robert Chansler
> Fix For: 0.16.0
>
> Attachments: Grid_HadoopPermissionsUserGuide1.pdf
>
>
> 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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