[OOZIE-1335] The launcher job should use uber mode in Hadoop 2 by default

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: trunk
• Fix Version/s: 4.0.0
• Assignee: Robert Kanter
• Reporter: Robert Kanter
• Created: 19/Apr/13 20:29
• Updated: 31/Aug/13 00:02
• Resolved: 02/May/13 17:34

Description

In theory, running the launcher job in Hadoop 2's uber mode should make the overall action time faster because we don't need to launch as many JVMs.

I tested this out on a few of the examples in a VM, and it seems to save about 10 - 50 seconds per action. While my testing wasn't scientific and was only on a single VM, setting the launcher job to run in uber mode by default is such a trivial change and should at least not make it slower that I think we should do it.

Issue Links

• relates to: OOZIE-1385 Make Uber Mode the default
• relates to: OOZIE-1372 When using uber mode, Oozie should also make the AM container size larger
• relates to: OOZIE-1384 Make Uber Mode not the default