rmdmattingly commented on code in PR #6651: URL: https://github.com/apache/hbase/pull/6651#discussion_r1959719614
########## hbase-balancer/src/test/java/org/apache/hadoop/hbase/master/balancer/TestLargeClusterBalancingConditionalReplicaDistribution.java: ########## @@ -0,0 +1,113 @@ +/* + * 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.hbase.master.balancer; + +import static org.apache.hadoop.hbase.master.balancer.CandidateGeneratorTestUtil.runBalancerToExhaustion; + +import java.util.ArrayList; +import java.util.HashMap; +import java.util.List; +import java.util.Map; +import java.util.Set; +import org.apache.hadoop.conf.Configuration; +import org.apache.hadoop.hbase.HBaseClassTestRule; +import org.apache.hadoop.hbase.ServerName; +import org.apache.hadoop.hbase.TableName; +import org.apache.hadoop.hbase.client.RegionInfo; +import org.apache.hadoop.hbase.client.RegionInfoBuilder; +import org.apache.hadoop.hbase.master.balancer.replicas.ReplicaKeyCache; +import org.apache.hadoop.hbase.testclassification.MediumTests; +import org.apache.hadoop.hbase.util.Bytes; +import org.junit.BeforeClass; +import org.junit.ClassRule; +import org.junit.Test; +import org.junit.experimental.categories.Category; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +@Category(MediumTests.class) +public class TestLargeClusterBalancingConditionalReplicaDistribution { + + @ClassRule + public static final HBaseClassTestRule CLASS_RULE = + HBaseClassTestRule.forClass(TestLargeClusterBalancingConditionalReplicaDistribution.class); + + private static final Logger LOG = + LoggerFactory.getLogger(TestLargeClusterBalancingConditionalReplicaDistribution.class); + + private static final int NUM_SERVERS = 1000; + private static final int NUM_REGIONS = 20_000; + private static final int NUM_REPLICAS = 3; + private static final int NUM_TABLES = 100; + + private static final ServerName[] servers = new ServerName[NUM_SERVERS]; + private static final Map<ServerName, List<RegionInfo>> serverToRegions = new HashMap<>(); + + @BeforeClass + public static void setup() { + // Initialize servers + for (int i = 0; i < NUM_SERVERS; i++) { + servers[i] = ServerName.valueOf("server" + i, i, System.currentTimeMillis()); + serverToRegions.put(servers[i], new ArrayList<>()); + } + + // Create primary regions and their replicas + List<RegionInfo> allRegions = new ArrayList<>(); + for (int i = 0; i < NUM_REGIONS; i++) { + TableName tableName = getTableName(i); + // Define startKey and endKey for the region + byte[] startKey = Bytes.toBytes(i); + byte[] endKey = Bytes.toBytes(i + 1); + + // Create 3 replicas for each primary region + for (int replicaId = 0; replicaId < NUM_REPLICAS; replicaId++) { + RegionInfo regionInfo = RegionInfoBuilder.newBuilder(tableName).setStartKey(startKey) + .setEndKey(endKey).setReplicaId(replicaId).build(); + allRegions.add(regionInfo); + } + } + + // Assign all regions to one server + for (RegionInfo regionInfo : allRegions) { + serverToRegions.get(servers[0]).add(regionInfo); + } + } + + private static TableName getTableName(int i) { + return TableName.valueOf("userTable" + i % NUM_TABLES); + } + + @Test + public void testReplicaDistribution() { + Configuration conf = new Configuration(false); Review Comment: I don't think it matters in this context, but I'm happy to do whatever's more typical -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
