Set up YARN workflow queues

To set up Capacity Scheduler queues on a view instance.

1. On the YARN Queue Manager view instance configuration page, click Add Queue.
   To return to a previously created YARN Queue Manager view instance:
   1. Click Views on the Manage Ambari page.
   2. Click CAPACITY-SCHEDULER.
   3. Click the applicable YARN Queue Manager view instance, then click Go to instance at the top of the page.
      The queue will be added under the top-level, or root queue. A default queue already exists under the root queue.
2. Type in a name for the new queue, then click the green check mark to create the queue.
   In the following example, we're creating a queue named Engineering.
   The Engineering queue is added, and its configuration page appears.
3. Set the capacity for the Engineering queue to 60%.
   The sum of queue capacities at any level in the YARN Queue Manager configuration must total 100%. Here the default queue is already set to 100%. Therefore, if we try to set the Engineering queue capacity to 60%, error messages appear warning that the total at this level is 160%.
4. If we click the Default queue and set its capacity to 0%, the Level Total bar at the top of the page lists the total queue capacity at this level as 60%.
   
5. To add more queues at the root level, click the root queue, then click Add Queue.
   In the following example, we have added a Support queue set to 10% of the level capacity, and a Marketing queue set to 30%. The root-level queue capacities now total 100%.
6. To save your configuration, click Actions > Save Only.
7. On the Notes pop-up, enter an optional description of your changes, then click Save.
   Each version is retained and listed in the Versions box.
8. To build a queue hierarchy, click a top-level queue, then click Add Queue.
   In the following example, the qa and development queues have been added under the Engineering queue.