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From "Owen O'Malley (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-1873) User permissions for Map/Reduce
Date Wed, 26 Sep 2007 22:24:50 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-1873?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12530575

Owen O'Malley commented on HADOOP-1873:

> That's not clear to me. Can't we make the system directory world-writable but readable
only by 
> the jobtracker/tasktracker user?

I assume you mean that the system directory is rwx-wx-wx so that you can create directories
in it, but not scan what is there? Even so, the job directory under the system dir would need
to be world readable and writable so that the job tracker can read it and delete it when the
job is done.  But you don't want the users to be able to guess the directory names and grab
each other's tickets by looking at their job.xmls. I suspect that we just need to send the
JobConf and input splits via rpc.

> User permissions for Map/Reduce
> -------------------------------
>                 Key: HADOOP-1873
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1873
>             Project: Hadoop
>          Issue Type: Improvement
>            Reporter: Raghu Angadi
>            Assignee: Raghu Angadi
> HADOOP-1298 and HADOOP-1701 add permissions and pluggable security for DFS files and
DFS accesses. Same users permission should work for Map/Reduce jobs as well. 
> User persmission should propegate from client to map/reduce tasks and all the file operations
should be subject to user permissions. This is transparent to the user (i.e. no changes to
user code should be required). 

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