| /** |
| * 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.resource; |
| |
| import org.apache.hadoop.yarn.api.records.Resource; |
| |
| public class DefaultResourceCalculator extends ResourceCalculator { |
| |
| Resource clusterResource; |
| |
| @Override |
| public int compare(Resource unused, Resource lhs, Resource rhs) { |
| // Only consider memory |
| return lhs.getMemory() - rhs.getMemory(); |
| } |
| |
| @Override |
| public int computeAvailableContainers(Resource available, Resource required) { |
| // Only consider memory |
| return available.getMemory() / required.getMemory(); |
| } |
| |
| @Override |
| public float divide(Resource unused, |
| Resource numerator, Resource denominator) { |
| return ratio(numerator, denominator); |
| } |
| |
| @Override |
| public float ratio(Resource a, Resource b) { |
| return (float)a.getMemory() / b.getMemory(); |
| } |
| |
| @Override |
| public Resource divideAndCeil(Resource numerator, int denominator) { |
| return Resources.createResource( |
| divideAndCeil(numerator.getMemory(), denominator)); |
| } |
| |
| @Override |
| public Resource normalize(Resource r, Resource minimumResource) { |
| return Resources.createResource( |
| roundUp( |
| Math.max(r.getMemory(), minimumResource.getMemory()), |
| minimumResource.getMemory()) |
| ); |
| } |
| |
| @Override |
| public Resource roundUp(Resource r, Resource minimumResource) { |
| return Resources.createResource( |
| roundUp(r.getMemory(),minimumResource.getMemory()) |
| ); |
| } |
| |
| @Override |
| public Resource roundDown(Resource r, Resource stepFactor) { |
| return Resources.createResource( |
| roundDown(r.getMemory(), stepFactor.getMemory())); |
| } |
| |
| @Override |
| public Resource multiplyAndNormalizeUp(Resource r, double by, |
| Resource stepFactor) { |
| return Resources.createResource( |
| roundUp((int)(r.getMemory() * by + 0.5), stepFactor.getMemory()) |
| ); |
| } |
| |
| @Override |
| public Resource multiplyAndNormalizeDown(Resource r, double by, |
| Resource stepFactor) { |
| return Resources.createResource( |
| roundDown( |
| (int)(r.getMemory() * by), |
| stepFactor.getMemory() |
| ) |
| ); |
| } |
| |
| } |