| /** |
| * 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.hdfs.server.balancer; |
| |
| import java.util.Collections; |
| import java.util.Set; |
| |
| import org.apache.hadoop.classification.InterfaceAudience; |
| |
| @InterfaceAudience.Private |
| final class BalancerParameters { |
| private final BalancingPolicy policy; |
| private final double threshold; |
| private final int maxIdleIteration; |
| /** Exclude the nodes in this set. */ |
| private final Set<String> excludedNodes; |
| /** If empty, include any node; otherwise, include only these nodes. */ |
| private final Set<String> includedNodes; |
| /** |
| * If empty, any node can be a source; otherwise, use only these nodes as |
| * source nodes. |
| */ |
| private final Set<String> sourceNodes; |
| /** |
| * A set of block pools to run the balancer on. |
| */ |
| private final Set<String> blockpools; |
| /** |
| * Whether to run the balancer during upgrade. |
| */ |
| private final boolean runDuringUpgrade; |
| |
| static final BalancerParameters DEFAULT = new BalancerParameters(); |
| |
| private BalancerParameters() { |
| this(new Builder()); |
| } |
| |
| private BalancerParameters(Builder builder) { |
| this.policy = builder.policy; |
| this.threshold = builder.threshold; |
| this.maxIdleIteration = builder.maxIdleIteration; |
| this.excludedNodes = builder.excludedNodes; |
| this.includedNodes = builder.includedNodes; |
| this.sourceNodes = builder.sourceNodes; |
| this.blockpools = builder.blockpools; |
| this.runDuringUpgrade = builder.runDuringUpgrade; |
| } |
| |
| BalancingPolicy getBalancingPolicy() { |
| return this.policy; |
| } |
| |
| double getThreshold() { |
| return this.threshold; |
| } |
| |
| int getMaxIdleIteration() { |
| return this.maxIdleIteration; |
| } |
| |
| Set<String> getExcludedNodes() { |
| return this.excludedNodes; |
| } |
| |
| Set<String> getIncludedNodes() { |
| return this.includedNodes; |
| } |
| |
| Set<String> getSourceNodes() { |
| return this.sourceNodes; |
| } |
| |
| Set<String> getBlockPools() { |
| return this.blockpools; |
| } |
| |
| boolean getRunDuringUpgrade() { |
| return this.runDuringUpgrade; |
| } |
| |
| @Override |
| public String toString() { |
| return String.format("%s.%s [%s," + " threshold = %s," |
| + " max idle iteration = %s," + " #excluded nodes = %s," |
| + " #included nodes = %s," + " #source nodes = %s," |
| + " #blockpools = %s," + " run during upgrade = %s]", |
| Balancer.class.getSimpleName(), getClass().getSimpleName(), policy, |
| threshold, maxIdleIteration, excludedNodes.size(), |
| includedNodes.size(), sourceNodes.size(), blockpools.size(), |
| runDuringUpgrade); |
| } |
| |
| static class Builder { |
| // Defaults |
| private BalancingPolicy policy = BalancingPolicy.Node.INSTANCE; |
| private double threshold = 10.0; |
| private int maxIdleIteration = |
| NameNodeConnector.DEFAULT_MAX_IDLE_ITERATIONS; |
| private Set<String> excludedNodes = Collections.<String> emptySet(); |
| private Set<String> includedNodes = Collections.<String> emptySet(); |
| private Set<String> sourceNodes = Collections.<String> emptySet(); |
| private Set<String> blockpools = Collections.<String> emptySet(); |
| private boolean runDuringUpgrade = false; |
| |
| Builder() { |
| } |
| |
| Builder setBalancingPolicy(BalancingPolicy p) { |
| this.policy = p; |
| return this; |
| } |
| |
| Builder setThreshold(double t) { |
| this.threshold = t; |
| return this; |
| } |
| |
| Builder setMaxIdleIteration(int m) { |
| this.maxIdleIteration = m; |
| return this; |
| } |
| |
| Builder setExcludedNodes(Set<String> nodes) { |
| this.excludedNodes = nodes; |
| return this; |
| } |
| |
| Builder setIncludedNodes(Set<String> nodes) { |
| this.includedNodes = nodes; |
| return this; |
| } |
| |
| Builder setSourceNodes(Set<String> nodes) { |
| this.sourceNodes = nodes; |
| return this; |
| } |
| |
| Builder setBlockpools(Set<String> pools) { |
| this.blockpools = pools; |
| return this; |
| } |
| |
| Builder setRunDuringUpgrade(boolean run) { |
| this.runDuringUpgrade = run; |
| return this; |
| } |
| |
| BalancerParameters build() { |
| return new BalancerParameters(this); |
| } |
| } |
| } |