| package org.apache.helix.controller.rebalancer; |
| |
| /* |
| * 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. |
| */ |
| |
| import java.util.ArrayList; |
| import java.util.HashMap; |
| import java.util.LinkedHashMap; |
| import java.util.List; |
| import java.util.Map; |
| |
| import org.apache.helix.ZNRecord; |
| import org.apache.helix.controller.dataproviders.ResourceControllerDataProvider; |
| import org.apache.helix.controller.rebalancer.strategy.AutoRebalanceStrategy; |
| import org.testng.Assert; |
| import org.testng.annotations.Test; |
| |
| public class TestAutoRebalanceStrategyImbalanceAssignment { |
| private static final String resourceName = "ImbalanceResource"; |
| |
| @Test |
| public void testImbalanceAssignments() { |
| final int nReplicas = 5; |
| final int nPartitions = 20; |
| final int nNode = 10; |
| |
| // Test all the combination of partitions, replicas and nodes |
| for (int i = nPartitions; i > 0; i--) { |
| for (int j = nReplicas; j > 0; j--) { |
| for (int k = nNode; k > 0; k--) { |
| if (k >= j) { |
| testAssignment(i, j, k); |
| } |
| } |
| } |
| } |
| } |
| |
| private void testAssignment(int nPartitions, int nReplicas, int nNode) { |
| final List<String> instanceNames = new ArrayList<>(); |
| for (int i = 0; i < nNode; i++) { |
| instanceNames.add("localhost_" + i); |
| } |
| List<String> partitions = new ArrayList<>(nPartitions); |
| for (int i = 0; i < nPartitions; i++) { |
| partitions.add(Integer.toString(i)); |
| } |
| |
| LinkedHashMap<String, Integer> states = new LinkedHashMap<>(2); |
| states.put("OFFLINE", 0); |
| states.put("ONLINE", nReplicas); |
| |
| AutoRebalanceStrategy strategy = new AutoRebalanceStrategy(resourceName, partitions, states); |
| ZNRecord record = strategy.computePartitionAssignment(instanceNames, instanceNames, |
| new HashMap<String, Map<String, String>>(0), new ResourceControllerDataProvider()); |
| |
| for (Map<String, String> stateMapping : record.getMapFields().values()) { |
| Assert.assertEquals(stateMapping.size(), nReplicas); |
| } |
| } |
| } |