How to use

setSchedulingPolicy

method

in

org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FSQueueMetrics

/**
 * Test if the metric scheduling policy is set correctly.
 */
@Test
public void testSchedulingPolicy() {
 String queueName = "single";
 FSQueueMetrics metrics = FSQueueMetrics.forQueue(ms, queueName, null, false,
   CONF);
 metrics.setSchedulingPolicy("drf");
 checkSchedulingPolicy(queueName, "drf");
 // test resetting the scheduling policy
 metrics.setSchedulingPolicy("fair");
 checkSchedulingPolicy(queueName, "fair");
}

 /**
  * Initialize a {@link FSQueue} with queue-specific properties and its
  * metrics.
  * @param queue the FSQueue needed to be initialized
  */
 public void initFSQueue(FSQueue queue){
  // Set queue-specific properties.
  String name = queue.getName();
  queue.setWeights(getQueueWeight(name));
  queue.setMinShare(getMinResources(name));
  queue.setMaxShare(getMaxResources(name));
  queue.setMaxRunningApps(getQueueMaxApps(name));
  queue.setMaxAMShare(getQueueMaxAMShare(name));
  queue.setMaxChildQueueResource(getMaxChildResources(name));
  queue.setMaxContainerAllocation(getQueueMaxContainerAllocation(name));

  // Set queue metrics.
  queue.getMetrics().setMinShare(queue.getMinShare());
  queue.getMetrics().setMaxShare(queue.getMaxShare());
  queue.getMetrics().setMaxApps(queue.getMaxRunningApps());
  queue.getMetrics().setSchedulingPolicy(getSchedulingPolicy(name).getName());
 }
}