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From "Hairong Kuang (JIRA)" <j...@apache.org>
Subject [jira] Issue Comment Edited: (HADOOP-1873) User permissions for Map/Reduce
Date Wed, 19 Dec 2007 20:43:43 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-1873?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12553482
] 

hairong edited comment on HADOOP-1873 at 12/19/07 12:43 PM:
------------------------------------------------------------------

This patch makes the following changes to map/reduce:
1. JobTracker removes all the files/subdirectories under the map/reduce system instead of
removing the mapreduce system directory. If the system directory does not exist, it creates
it with the permission \-wx\-wx\-wx. This requires that the runner of the job tracker is the
same as the namenode.
2. JobClient creates job direoctories using the permission \-wx\-wx\-wx and creates job files
using the permission rw\-r\-\-r\-\-. It also stores its user id in the job configuration.

      was (Author: hairong):
    This patch makes the following changes to map/reduce:
1. JobTracker removes all the files/subdirectories under the map/reduce system instead of
removing the mapreduce system directory. If the system directory does not exist, it creates
it with the right permission -wx-wx-wx. This requires that the runner of the job tracker is
the same as the namenode.
2. JobClient creates job direoctories using the permission -wx-wx-wx and creates job files
using the permission rw-r--r--. It also stores its user id in the job configuration.
  
> 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: Hairong Kuang
>         Attachments: mapred.patch
>
>
> 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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