@Override
public Resource getHeadroom() {
final FSQueue queue = (FSQueue) this.queue;
SchedulingPolicy policy = queue.getPolicy();
Resource queueFairShare = queue.getFairShare();
Resource queueUsage = queue.getResourceUsage();
Resource clusterResource = this.scheduler.getClusterResource();
Resource clusterUsage = this.scheduler.getRootQueueMetrics().getAllocatedResources();
Resource clusterAvailableResource = Resources.subtract(clusterResource, clusterUsage);
Resource headroom = policy.getHeadroom(queueFairShare, queueUsage, clusterAvailableResource);
if (LOG.isDebugEnabled()) {
LOG.debug(
"Headroom calculation for "
+ this.getName()
+ ":"
+ "Min("
+ "(queueFairShare="
+ queueFairShare
+ " - queueUsage="
+ queueUsage
+ "),"
+ " clusterAvailableResource="
+ clusterAvailableResource
+ "(clusterResource="
+ clusterResource
+ " - clusterUsage="
+ clusterUsage
+ ")"
+ "Headroom="
+ headroom);
}
return headroom;
}
