| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair; |
| |
| import org.apache.hadoop.classification.InterfaceAudience.Private; |
| import org.apache.hadoop.classification.InterfaceStability.Unstable; |
| import org.apache.hadoop.yarn.api.records.Resource; |
| |
| /** |
| * A {@code ConfigurableResource} object represents an entity that is used to |
| * configure resources, such as maximum resources of a queue. It can be |
| * percentage of cluster resources or an absolute value. |
| */ |
| @Private |
| @Unstable |
| public class ConfigurableResource { |
| private final Resource resource; |
| private final double[] percentages; |
| |
| public ConfigurableResource(double[] percentages) { |
| this.percentages = percentages.clone(); |
| this.resource = null; |
| } |
| |
| public ConfigurableResource(Resource resource) { |
| this.percentages = null; |
| this.resource = resource; |
| } |
| |
| /** |
| * Get resource by multiplying the cluster resource and the percentage of |
| * each resource respectively. Return the absolute resource if either |
| * {@code percentages} or {@code clusterResource} is null. |
| * |
| * @param clusterResource the cluster resource |
| * @return resource |
| */ |
| public Resource getResource(Resource clusterResource) { |
| if (percentages != null && clusterResource != null) { |
| long memory = (long) (clusterResource.getMemorySize() * percentages[0]); |
| int vcore = (int) (clusterResource.getVirtualCores() * percentages[1]); |
| return Resource.newInstance(memory, vcore); |
| } else { |
| return resource; |
| } |
| } |
| |
| /** |
| * Get the absolute resource. |
| * |
| * @return the absolute resource |
| */ |
| public Resource getResource() { |
| return resource; |
| } |
| } |