[jira] [Created] (YARN-10613) Config to allow Intra-queue preemption to enable/disable conservativeDRF

["Eric Payne (Jira)" <ji...@apache.org>]

Eric Payne created YARN-10613:
---------------------------------

             Summary: Config to allow Intra-queue preemption to  enable/disable conservativeDRF
                 Key: YARN-10613
                 URL: https://issues.apache.org/jira/browse/YARN-10613
             Project: Hadoop YARN
          Issue Type: Improvement
          Components: capacity scheduler, scheduler preemption
    Affects Versions: 2.10.1, 3.1.4, 3.2.2, 3.3.0
            Reporter: Eric Payne
            Assignee: Eric Payne


YARN-8292 added code that prevents CS intra-queue preemption from preempting containers from an app unless all of the major resources used by the app are greater than the user limit for that user.

Ex:
| Used | User Limit |
| <58GB, 58> | <30GB, 300> |

In this example, only used memory is above the user limit, not used vcores. So, intra-queue preemption will not occur.

YARN-8292 added the {{conservativeDRF}} flag to {{CapacitySchedulerPreemptionUtils#tryPreemptContainerAndDeductResToObtain}}. If {{conservativeDRF}} is false, containers will be preempted from apps in the example state. If true, containers will not be preempted.

This flag is hard-coded to false for Inter-queue (cross-queue) preemption and true for intra-queue (in-queue) preemption.

I propose that in some cases, we want intra-queue preemption to be more aggressive and preempt in the example case. To accommodate that, I propose the addition of the following config property:
{code:xml}
  <property>
    <name>yarn.resourcemanager.monitor.capacity.preemption.intra-queue-preemption.conservative-drf</name>
    <value>true</value>
  </property>
{code}



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