HDFS-5837. dfs.namenode.replication.considerLoad should consider decommissioned nodes. Contributed by Tao Luo.
git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1566410 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Konstantin Shvachko
parent
a2edb11b68
commit
204704a92d
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@ -940,6 +940,9 @@ Release 2.3.0 - UNRELEASED
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HDFS-5873. dfs.http.policy should have higher precedence over dfs.https.enable.
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(Haohui Mai via jing9)
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HDFS-5837. dfs.namenode.replication.considerLoad should consider
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decommissioned nodes. (Tao Luo via shv)
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BREAKDOWN OF HDFS-2832 SUBTASKS AND RELATED JIRAS
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HDFS-4985. Add storage type to the protocol and expose it in block report
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@ -633,9 +633,11 @@ public class BlockPlacementPolicyDefault extends BlockPlacementPolicy {
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// check the communication traffic of the target machine
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if (considerLoad) {
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double avgLoad = 0;
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int size = clusterMap.getNumOfLeaves();
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if (size != 0 && stats != null) {
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avgLoad = (double)stats.getTotalLoad()/size;
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if (stats != null) {
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int size = stats.getNumDatanodesInService();
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if (size != 0) {
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avgLoad = (double)stats.getTotalLoad()/size;
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}
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}
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if (node.getXceiverCount() > (2.0 * avgLoad)) {
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logNodeIsNotChosen(storage, "the node is too busy ");
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@ -42,6 +42,12 @@ public interface FSClusterStats {
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* for writing targets, and false otherwise.
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*/
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public boolean isAvoidingStaleDataNodesForWrite();
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/**
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* Indicates number of datanodes that are in service.
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* @return Number of datanodes that are both alive and not decommissioned.
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*/
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public int getNumDatanodesInService();
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}
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@ -6842,7 +6842,12 @@ public class FSNamesystem implements Namesystem, FSClusterStats,
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return this.blockManager.getDatanodeManager()
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.shouldAvoidStaleDataNodesForWrite();
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}
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@Override // FSClusterStats
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public int getNumDatanodesInService() {
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return getNumLiveDataNodes() - getNumDecomLiveDataNodes();
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}
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public SnapshotManager getSnapshotManager() {
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return snapshotManager;
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}
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@ -0,0 +1,161 @@
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/**
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.hadoop.hdfs.server.blockmanagement;
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import org.apache.hadoop.conf.Configuration;
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import org.apache.hadoop.fs.FileSystem;
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import org.apache.hadoop.hdfs.DFSConfigKeys;
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import org.apache.hadoop.hdfs.DFSTestUtil;
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import org.apache.hadoop.hdfs.HdfsConfiguration;
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import org.apache.hadoop.hdfs.StorageType;
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import org.apache.hadoop.hdfs.protocol.DatanodeInfo;
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import org.apache.hadoop.hdfs.protocol.HdfsConstants;
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import org.apache.hadoop.hdfs.security.token.block.ExportedBlockKeys;
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import org.apache.hadoop.hdfs.server.common.StorageInfo;
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import org.apache.hadoop.hdfs.server.namenode.NameNode;
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import org.apache.hadoop.hdfs.server.protocol.DatanodeRegistration;
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import org.apache.hadoop.test.PathUtils;
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import org.apache.hadoop.util.VersionInfo;
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import org.junit.AfterClass;
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import org.junit.BeforeClass;
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import org.junit.Test;
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import java.io.File;
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import java.io.IOException;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.HashSet;
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import java.util.List;
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import java.util.Set;
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import static org.junit.Assert.assertEquals;
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import static org.junit.Assert.assertTrue;
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public class TestReplicationPolicyConsiderLoad {
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private static NameNode namenode;
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private static DatanodeManager dnManager;
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private static List<DatanodeRegistration> dnrList;
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private static DatanodeDescriptor[] dataNodes;
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private static DatanodeStorageInfo[] storages;
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@BeforeClass
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public static void setupCluster() throws IOException {
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Configuration conf = new HdfsConfiguration();
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final String[] racks = {
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"/rack1",
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"/rack1",
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"/rack1",
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"/rack2",
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"/rack2",
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"/rack2"};
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storages = DFSTestUtil.createDatanodeStorageInfos(racks);
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dataNodes = DFSTestUtil.toDatanodeDescriptor(storages);
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FileSystem.setDefaultUri(conf, "hdfs://localhost:0");
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conf.set(DFSConfigKeys.DFS_NAMENODE_HTTP_ADDRESS_KEY, "0.0.0.0:0");
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File baseDir = PathUtils.getTestDir(TestReplicationPolicy.class);
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conf.set(DFSConfigKeys.DFS_NAMENODE_NAME_DIR_KEY,
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new File(baseDir, "name").getPath());
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conf.setBoolean(
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DFSConfigKeys.DFS_NAMENODE_AVOID_STALE_DATANODE_FOR_READ_KEY, true);
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conf.setBoolean(
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DFSConfigKeys.DFS_NAMENODE_AVOID_STALE_DATANODE_FOR_WRITE_KEY, true);
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conf.setBoolean(
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DFSConfigKeys.DFS_NAMENODE_REPLICATION_CONSIDERLOAD_KEY, true);
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DFSTestUtil.formatNameNode(conf);
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namenode = new NameNode(conf);
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int blockSize = 1024;
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dnrList = new ArrayList<DatanodeRegistration>();
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dnManager = namenode.getNamesystem().getBlockManager().getDatanodeManager();
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// Register DNs
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for (int i=0; i < 6; i++) {
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DatanodeRegistration dnr = new DatanodeRegistration(dataNodes[i],
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new StorageInfo(), new ExportedBlockKeys(), VersionInfo.getVersion());
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dnrList.add(dnr);
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dnManager.registerDatanode(dnr);
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dataNodes[i].getStorageInfos()[0].setUtilizationForTesting(
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2*HdfsConstants.MIN_BLOCKS_FOR_WRITE*blockSize, 0L,
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2*HdfsConstants.MIN_BLOCKS_FOR_WRITE*blockSize, 0L);
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dataNodes[i].updateHeartbeat(
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BlockManagerTestUtil.getStorageReportsForDatanode(dataNodes[i]),
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0L, 0L, 0, 0);
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}
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}
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/**
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* Tests that chooseTarget with considerLoad set to true correctly calculates
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* load with decommissioned nodes.
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*/
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@Test
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public void testChooseTargetWithDecomNodes() throws IOException {
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namenode.getNamesystem().writeLock();
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try {
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// Decommission DNs so BlockPlacementPolicyDefault.isGoodTarget()
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// returns false
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for (int i = 0; i < 3; i++) {
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DatanodeInfo d = dnManager.getDatanodeByXferAddr(
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dnrList.get(i).getIpAddr(),
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dnrList.get(i).getXferPort());
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d.setDecommissioned();
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}
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String blockPoolId = namenode.getNamesystem().getBlockPoolId();
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dnManager.handleHeartbeat(dnrList.get(3),
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BlockManagerTestUtil.getStorageReportsForDatanode(dataNodes[3]),
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blockPoolId, dataNodes[3].getCacheCapacity(),
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dataNodes[3].getCacheRemaining(),
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2, 0, 0);
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dnManager.handleHeartbeat(dnrList.get(4),
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BlockManagerTestUtil.getStorageReportsForDatanode(dataNodes[4]),
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blockPoolId, dataNodes[4].getCacheCapacity(),
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dataNodes[4].getCacheRemaining(),
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4, 0, 0);
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dnManager.handleHeartbeat(dnrList.get(5),
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BlockManagerTestUtil.getStorageReportsForDatanode(dataNodes[5]),
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blockPoolId, dataNodes[5].getCacheCapacity(),
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dataNodes[5].getCacheRemaining(),
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4, 0, 0);
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// Call chooseTarget()
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DatanodeStorageInfo[] targets = namenode.getNamesystem().getBlockManager()
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.getBlockPlacementPolicy().chooseTarget("testFile.txt", 3,
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dataNodes[0], new ArrayList<DatanodeStorageInfo>(), false, null,
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1024, StorageType.DEFAULT);
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assertEquals(3, targets.length);
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Set<DatanodeStorageInfo> targetSet = new HashSet<DatanodeStorageInfo>(
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Arrays.asList(targets));
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for (int i = 3; i < storages.length; i++) {
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assertTrue(targetSet.contains(storages[i]));
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}
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} finally {
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dataNodes[0].stopDecommission();
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dataNodes[1].stopDecommission();
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dataNodes[2].stopDecommission();
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namenode.getNamesystem().writeUnlock();
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}
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NameNode.LOG.info("Done working on it");
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}
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@AfterClass
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public static void teardownCluster() {
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if (namenode != null) namenode.stop();
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}
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}
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