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Fair Share Preemption for undeclared (user) queues?

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Expert Contributor

Hi community,

 

I am trying to isolate my users from each other in YARN (CDH 5.15.1).

 

For that, I am using a queue root.users.<username>, in which each user is directed. The queues for users are not created, but will be created on submission - they are undeclared.

 

To guarantee resources, I would like to active FairShare Preemption on all user queues, although they are undeclared. Enabling Preemption on the root.users Queue did achieve any preemption.

 

I have set:

- Preemption is activated globally

- Fair Share Preemption Threshold of root.users is set to 0.5

- Fair Share Preemption Timeout of root.users is set to 5

- Preemptable of root.users is set to true

 

In my test, the cluster resources are fully allocated to root.users.alice. Then bob submits a job to root.users.bob but does not receive any resources.

 

Best,

Benjamin

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