[YARN-7017] Enable preemption for a single queue.

• Type: New Feature
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Component/s: capacity scheduler, yarn
• Assignee: Unassigned
• Reporter: sarun singla
• Created: 15/Aug/17 18:58
• Updated: 14/Oct/19 15:38
• Resolved: 18/Aug/17 16:22

Description

PROBLEM
How to enable preemption on a single queue in a cluster?
DESCRIPTION
As of today the only way to enable preemption at a queue level is:

• Enable cluster level preemption
• Disable preemption on the queues where not required using yarn.scheduler.capacity.<queue-path>.disable_preemption to true

Can we have some sort of a parameter like
yarn.scheduler.capacity.<queue-path>.enable_preemption
which would just enable preemption per queue instead of going the other way round which is more time consuming and error prone.