[YARN-8178] [Umbrella] Resource Over-commitment Based on Opportunistic Container Preemption

• Type: New Feature
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: capacity scheduler
• Assignee: Unassigned
• Reporter: Zian Chen
• Created: 18/Apr/18 22:00
• Updated: 20/Sep/18 18:13

Description

We want to provide an opportunistic container-based solution to achieve more aggressive preemption with shorter preemption monitoring interval. 

Instead of allowing applications to allocate resources with a mix of guaranteed and opportunistic containers, we allow newly submitted applications to only contain guaranteed containers. Meanwhile, we change the preemption logic to, instead of killing containers, demote guaranteed containers into opportunistic ones, so that when there are new applications submitted, we can ensure that these containers can be launched by preempting opportunistic containers.

This approach is related to YARN-1011 but achieves over-commitment in a different way. However, we rely on opportunistic container part implemented in YARN-1011 to make our design work well. 

Issue Links

• is related to: YARN-6828 [Umbrella] Container preemption using OPPORTUNISTIC containers