[MAPREDUCE-744] Support in DistributedCache to share cache files with other users after HADOOP-4493

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.21.0
• Component/s: distributed-cache, security, tasktracker
• Hadoop Flags: Reviewed

Release Note

Fixed DistributedCache to support sharing of the local cache files with other users on the same TaskTracker. The cache files are checked at the client side for public/private access on the file system, and that information is passed in the configuration. The TaskTrackers look at the configuration for each file during task localization, and, if the file was public on the filesystem, they are localized to a common space for sharing by all users' tasks on the TaskTracker. Else the file is localized to the user's private directory on the local filesystem.

• Assignee: Devaraj Das
• Reporter: Vinod Kumar Vavilapalli
• Created: 09/Jul/09 09:49
• Updated: 24/Aug/10 21:14
• Resolved: 25/Dec/09 00:56

Description

HADOOP-4493 aims to completely privatize the files distributed to TT via DistributedCache. This jira issues focuses on sharing some/all of these files with all other users.

Issue Links

• is blocked by: MAPREDUCE-856 Localized files from DistributedCache should have right access-control