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src/test/org/apache/hadoop/hdfs/server/namenode/web/resources/TestWebHdfsDataLocality.java
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| /** | ||
| * 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.namenode.web.resources; | ||
|
|
||
| import java.util.Arrays; | ||
| import java.util.List; | ||
|
|
||
| import org.apache.commons.logging.Log; | ||
| import org.apache.commons.logging.LogFactory; | ||
| import org.apache.commons.logging.impl.Log4JLogger; | ||
| import org.apache.hadoop.conf.Configuration; | ||
| import org.apache.hadoop.fs.FSDataOutputStream; | ||
| import org.apache.hadoop.fs.Path; | ||
| import org.apache.hadoop.hdfs.DFSConfigKeys; | ||
| import org.apache.hadoop.hdfs.DistributedFileSystem; | ||
| import org.apache.hadoop.hdfs.MiniDFSCluster; | ||
| import org.apache.hadoop.hdfs.protocol.DatanodeInfo; | ||
| import org.apache.hadoop.hdfs.protocol.LocatedBlock; | ||
| import org.apache.hadoop.hdfs.protocol.LocatedBlocks; | ||
| import org.apache.hadoop.hdfs.server.datanode.DataNode; | ||
| import org.apache.hadoop.hdfs.server.namenode.FSNamesystem; | ||
| import org.apache.hadoop.hdfs.server.namenode.LeaseManager; | ||
| import org.apache.hadoop.hdfs.server.namenode.NameNode; | ||
| import org.apache.hadoop.hdfs.server.namenode.NameNodeAdapter; | ||
| import org.apache.hadoop.hdfs.web.WebHdfsTestUtil; | ||
| import org.apache.hadoop.hdfs.web.resources.GetOpParam; | ||
| import org.apache.hadoop.hdfs.web.resources.PostOpParam; | ||
| import org.apache.hadoop.hdfs.web.resources.PutOpParam; | ||
| import org.apache.log4j.Level; | ||
| import org.junit.Assert; | ||
| import org.junit.Test; | ||
|
|
||
| /** | ||
| * Test WebHDFS which provides data locality using HTTP redirection. | ||
| */ | ||
| public class TestWebHdfsDataLocality { | ||
| static final Log LOG = LogFactory.getLog(TestWebHdfsDataLocality.class); | ||
| { | ||
| ((Log4JLogger)NameNode.stateChangeLog).getLogger().setLevel(Level.OFF); | ||
| ((Log4JLogger)LeaseManager.LOG).getLogger().setLevel(Level.OFF); | ||
| ((Log4JLogger)LogFactory.getLog(FSNamesystem.class)).getLogger().setLevel(Level.OFF); | ||
| } | ||
|
|
||
| private static final String RACK0 = "/rack0"; | ||
| private static final String RACK1 = "/rack1"; | ||
| private static final String RACK2 = "/rack2"; | ||
|
|
||
| @Test | ||
| public void testDataLocality() throws Exception { | ||
| final Configuration conf = WebHdfsTestUtil.createConf(); | ||
| final String[] racks = {RACK0, RACK0, RACK1, RACK1, RACK2, RACK2}; | ||
| final int nDataNodes = racks.length; | ||
| LOG.info("nDataNodes=" + nDataNodes + ", racks=" + Arrays.asList(racks)); | ||
|
|
||
| final MiniDFSCluster cluster = new MiniDFSCluster( | ||
| conf, nDataNodes, true, racks); | ||
| try { | ||
| cluster.waitActive(); | ||
|
|
||
| final DistributedFileSystem dfs = (DistributedFileSystem)cluster.getFileSystem(); | ||
| final NameNode namenode = cluster.getNameNode(); | ||
| final FSNamesystem ns = namenode.getNamesystem(); | ||
| LOG.info("ns=" + ns); | ||
|
|
||
| final long blocksize = DFSConfigKeys.DFS_BLOCK_SIZE_DEFAULT; | ||
| final String f = "/foo"; | ||
|
|
||
| { //test CREATE | ||
| for(int i = 0; i < nDataNodes; i++) { | ||
| //set client address to a particular datanode | ||
| final DataNode dn = cluster.getDataNodes().get(i); | ||
| final String host = ns.getDatanode(dn.dnRegistration).getHost(); | ||
| NamenodeWebHdfsMethods.setRemoteAddress(host); | ||
|
|
||
| //The chosen datanode must be the same as the client address | ||
| final DatanodeInfo chosen = NamenodeWebHdfsMethods.chooseDatanode( | ||
| namenode, f, PutOpParam.Op.CREATE, -1L, blocksize); | ||
| Assert.assertEquals(host, chosen.getHost()); | ||
| } | ||
| } | ||
|
|
||
| //create a file with one replica. | ||
| final Path p = new Path(f); | ||
| final FSDataOutputStream out = dfs.create(p, (short)1); | ||
| out.write(1); | ||
| out.close(); | ||
|
|
||
| //get replica location. | ||
| final LocatedBlocks locatedblocks = NameNodeAdapter.getBlockLocations( | ||
| namenode, f, 0, 1); | ||
| final List<LocatedBlock> lb = locatedblocks.getLocatedBlocks(); | ||
| Assert.assertEquals(1, lb.size()); | ||
| final DatanodeInfo[] locations = lb.get(0).getLocations(); | ||
| Assert.assertEquals(1, locations.length); | ||
| final DatanodeInfo expected = locations[0]; | ||
|
|
||
| //For GETFILECHECKSUM, OPEN and APPEND, | ||
| //the chosen datanode must be the same as the replica location. | ||
|
|
||
| { //test GETFILECHECKSUM | ||
| final DatanodeInfo chosen = NamenodeWebHdfsMethods.chooseDatanode( | ||
| namenode, f, GetOpParam.Op.GETFILECHECKSUM, -1L, blocksize); | ||
| Assert.assertEquals(expected, chosen); | ||
| } | ||
|
|
||
| { //test OPEN | ||
| final DatanodeInfo chosen = NamenodeWebHdfsMethods.chooseDatanode( | ||
| namenode, f, GetOpParam.Op.OPEN, 0, blocksize); | ||
| Assert.assertEquals(expected, chosen); | ||
| } | ||
|
|
||
| { //test APPEND | ||
| final DatanodeInfo chosen = NamenodeWebHdfsMethods.chooseDatanode( | ||
| namenode, f, PostOpParam.Op.APPEND, -1L, blocksize); | ||
| Assert.assertEquals(expected, chosen); | ||
| } | ||
| } finally { | ||
| cluster.shutdown(); | ||
| } | ||
| } | ||
| } |
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