| /** |
| * 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 |
| * <p/> |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * <p/> |
| * 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.datanode; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertTrue; |
| |
| import java.util.List; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.hdfs.DFSConfigKeys; |
| import org.apache.hadoop.hdfs.HdfsConfiguration; |
| import org.apache.hadoop.hdfs.MiniDFSCluster; |
| import org.junit.Test; |
| |
| public class TestDataNodeTransferSocketSize { |
| |
| @Test |
| public void testSpecifiedDataSocketSize() throws Exception { |
| Configuration conf = new HdfsConfiguration(); |
| conf.setInt( |
| DFSConfigKeys.DFS_DATANODE_TRANSFER_SOCKET_RECV_BUFFER_SIZE_KEY, 4 * 1024); |
| SimulatedFSDataset.setFactory(conf); |
| MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf).build(); |
| try { |
| List<DataNode> datanodes = cluster.getDataNodes(); |
| DataNode datanode = datanodes.get(0); |
| assertEquals("Receive buffer size should be 4K", |
| 4 * 1024, datanode.getXferServer().getPeerServer().getReceiveBufferSize()); |
| } finally { |
| if (cluster != null) { |
| cluster.shutdown(); |
| } |
| } |
| } |
| |
| @Test |
| public void testAutoTuningDataSocketSize() throws Exception { |
| Configuration conf = new HdfsConfiguration(); |
| conf.setInt( |
| DFSConfigKeys.DFS_DATANODE_TRANSFER_SOCKET_RECV_BUFFER_SIZE_KEY, 0); |
| SimulatedFSDataset.setFactory(conf); |
| MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf).build(); |
| try { |
| List<DataNode> datanodes = cluster.getDataNodes(); |
| DataNode datanode = datanodes.get(0); |
| assertTrue( |
| "Receive buffer size should be a default value (determined by kernel)", |
| datanode.getXferServer().getPeerServer().getReceiveBufferSize() > 0); |
| } finally { |
| if (cluster != null) { |
| cluster.shutdown(); |
| } |
| } |
| } |
| } |