[YARN-10938] Support reservation scheduling enabled switch for capacity scheduler

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: capacity scheduler
• Labels: pull-request-available
• Assignee: Weihao Zheng
• Reporter: Weihao Zheng
• Created: 09/Sep/21 06:51
• Updated: 30/Sep/21 21:22

Description

Currently the CapacityScheduler uses reservations in order to handle requests for large containers and the fact there might not currently be enough space available on a single host. But this algorithm is not suitable for small cluster which only have very limited resources. So we can add a switch property in capacity scheduler's configuration to avoid reservation scheduling in these use cases.

CHANGES:

Add "yarn.scheduler.capacity.reservation.enabled" in capacity scheduler's configuration.
 

Issue Links

• links to: GitHub Pull Request #3414