[HADOOP-5726] Remove pre-emption from the capacity scheduler code base

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.20.1
• Hadoop Flags: Incompatible change, Reviewed

Release Note

Removed pre-emption from capacity scheduler. The impact of this change is that capacities for queues can no longer be guaranteed within a given span of time. Also changed configuration variables to remove pre-emption related variables and better reflect the absence of guarantees.

• Assignee: rahul k singh
• Reporter: Hemanth Yamijala
• Created: 23/Apr/09 07:50
• Updated: 22/Jun/12 17:48
• Resolved: 05/May/09 07:36

Description

In an effort to simplify the code base, we would like to remove the pre-emption related code in the capacity scheduler. We would reintroduce this (possibly with some revisions to the original design) after a while. This will be an incompatible change. Any objections ?

Issue Links

• blocks: HADOOP-5736 Update CapacityScheduler documentation to reflect latest changes