To enable the Capacity Scheduler, set the following property in the /etc/hadoop/conf/yarn-site.xml file on the ResourceManager host:

<property>
 <name>yarn.resourcemanager.scheduler.class</name>
 <value>org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacityScheduler</value>
</property>

The settings for the Capacity Scheduler are contained in the /etc/hadoop/conf/capacity-scheduler.xml file on the ResourceManager host. The Capacity Scheduler reads this file when starting, and also when an administrator modifies the capacity- scheduler.xml file and then reloads the settings by running the following command:

yarn rmadmin -refreshQueues

This command can only be run by cluster administrators. Administrator privileges are configured with the yarn.admin.acl property on the ResourceManager.