hadoop ResourceUtilizationTracker 源码
haddop ResourceUtilizationTracker 代码
文件路径：/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/java/org/apache/hadoop/yarn/server/nodemanager/containermanager/scheduler/ResourceUtilizationTracker.java
/**
* 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.Resource;
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);
/**
* Check if NM has resources available currently to run requested resources.
* @param resource the resources.
* @return True, if NM has enough available resources.
*/
boolean hasResourcesAvailable(Resource resource);
}
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