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https://issues.apache.org/jira/browse/HADOOP-1873?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12553482
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hairong edited comment on HADOOP-1873 at 12/19/07 12:43 PM:
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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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