[ 
https://issues.apache.org/jira/browse/HADOOP-1298?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12523767
 ] 

dhruba borthakur commented on HADOOP-1298:
------------------------------------------

This patch implements access checks for all components of a path when a 
filename-lookup occurs. This could potentially complicate things when we go to 
a more distributed namenode. If, in future, we consider a hash function to map 
a filename to the location of its namenode, then permission checking along the 
entire path while looking up a file cannot be implemented efficiently.

In short, i think we need some more discussion on whether HDFS will do access 
checks along the entire path while looking up a file. I believe NFS does not do 
access checks along the entire path (especially because it uses fileids for 
lookups). 

> adding user info to file
> ------------------------
>
>                 Key: HADOOP-1298
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1298
>             Project: Hadoop
>          Issue Type: New Feature
>          Components: dfs, fs
>            Reporter: Kurtis Heimerl
>            Assignee: Christophe Taton
>             Fix For: 0.15.0
>
>         Attachments: 1298_2007-08-23a.patch, hadoop-user-munncha.patch17
>
>
> I'm working on adding a permissions model to hadoop's DFS. The first step is 
> this change, which associates user info with files. Following this I'll 
> assoicate permissions info, then block methods based on that user info, then 
> authorization of the user info. 
> So, right now i've implemented adding user info to files. I'm looking for 
> feedback before I clean this up and make it offical. 
> I wasn't sure what release, i'm working off trunk. 

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.

Reply via email to