hadoop UniformBroadcastPolicyManager 源码
haddop UniformBroadcastPolicyManager 代码
文件路径：/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-common/src/main/java/org/apache/hadoop/yarn/server/federation/policies/manager/UniformBroadcastPolicyManager.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.federation.policies.manager;
import org.apache.hadoop.yarn.server.federation.policies.amrmproxy.BroadcastAMRMProxyPolicy;
import org.apache.hadoop.yarn.server.federation.policies.router.UniformRandomRouterPolicy;
/**
* This class represents a simple implementation of a {@code
* FederationPolicyManager}.
*
* It combines the basic policies: {@link UniformRandomRouterPolicy} and
* {@link BroadcastAMRMProxyPolicy}, which are designed to work together and
* "spread" the load among sub-clusters uniformly.
*
* This simple policy might impose heavy load on the RMs and return more
* containers than a job requested as all requests are (replicated and)
* broadcasted.
*/
public class UniformBroadcastPolicyManager extends AbstractPolicyManager {
public UniformBroadcastPolicyManager() {
// this structurally hard-codes two compatible policies for Router and
// AMRMProxy.
routerFederationPolicy = UniformRandomRouterPolicy.class;
amrmProxyFederationPolicy = BroadcastAMRMProxyPolicy.class;
}
}
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