| /** |
| * 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.nodemanager.containermanager.scheduler; |
| |
| import org.apache.hadoop.yarn.api.records.ResourceUtilization; |
| import org.apache.hadoop.yarn.server.nodemanager.containermanager.container.Container; |
| |
| /** |
| * This interface abstracts out how a container contributes to |
| * Resource Utilization of the node. |
| * It is used by the {@link ContainerScheduler} to determine which |
| * OPPORTUNISTIC containers to be killed to make room for a GUARANTEED |
| * container. |
| */ |
| public interface ResourceUtilizationTracker { |
| |
| /** |
| * Get the current total utilization of all the Containers running on |
| * the node. |
| * @return ResourceUtilization Resource Utilization. |
| */ |
| ResourceUtilization getCurrentUtilization(); |
| |
| /** |
| * Add Container's resources to Node Utilization. |
| * @param container Container. |
| */ |
| void addContainerResources(Container container); |
| |
| /** |
| * Subtract Container's resources to Node Utilization. |
| * @param container Container. |
| */ |
| void subtractContainerResource(Container container); |
| |
| /** |
| * Check if NM has resources available currently to run the container. |
| * @param container Container. |
| * @return True, if NM has resources available currently to run the container. |
| */ |
| boolean hasResourcesAvailable(Container container); |
| |
| } |