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From "Bikas Saha (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-8101) Access Control support for Non-secure deployment of Hadoop on Windows
Date Wed, 04 Apr 2012 20:19:25 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-8101?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13246688#comment-13246688

Bikas Saha commented on HADOOP-8101:

bq.Problem 1: Group Mappings for HDFS. HDFS file permissions are implemented inside HDFS -
there is no interaction with the local file system in order to implement these permissions.
However, HDFS needs a user-to-group mapping. Currently there is a pluggable module for obtaining
a mapping via LDap and via shell commands. We need a group mapping for windows.
HADOOP-8234 tracks this
bq.Problem 3: Permissions for RawLocalFileSystem when using Hadoop on a local desktop (no
HDFS is involved here). We need to emulate set-permissions and get-permissions APIs of the
class FileSystem.java when the local file system and desktop are windows. Hadoop FileSystem
permission are the same as those in Unix.
HADOOP-8235 tracks this. 
bq.Problem 2: HDFS and MR Impl Protecting its local OS resources from Tasks. Hadoop impl uses
local OS resources such as files and tasks. Hadoop protects these resources from tasks that
run on the same hosts. HDFS and MR daemons uses local files & dirs and sets permissions
when creating dirs/file and later on checks these permissions. For example, a Datanode sets
the permission of its "block dirs" to be unreadable by others when it formats a data node.
In some cases the permissions are set using a RawLocalFileSystem's permissions. We need a
way to set such protections for windows.
HADOOP-8235 might lead to a solution to this or we may be able to do something simpler for
> Access Control support for Non-secure deployment of Hadoop on Windows
> ---------------------------------------------------------------------
>                 Key: HADOOP-8101
>                 URL: https://issues.apache.org/jira/browse/HADOOP-8101
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: native
>            Reporter: Sanjay Radia
>         Attachments: security.patch, security1.patch

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