[120] | 1 | /** |
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| 2 | * Licensed to the Apache Software Foundation (ASF) under one |
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| 3 | * or more contributor license agreements. See the NOTICE file |
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| 4 | * distributed with this work for additional information |
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| 5 | * regarding copyright ownership. The ASF licenses this file |
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| 6 | * to you under the Apache License, Version 2.0 (the |
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| 7 | * "License"); you may not use this file except in compliance |
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| 8 | * with the License. You may obtain a copy of the License at |
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| 9 | * |
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| 10 | * http://www.apache.org/licenses/LICENSE-2.0 |
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| 11 | * |
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| 12 | * Unless required by applicable law or agreed to in writing, software |
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| 13 | * distributed under the License is distributed on an "AS IS" BASIS, |
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| 14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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| 15 | * See the License for the specific language governing permissions and |
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| 16 | * limitations under the License. |
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| 17 | */ |
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| 18 | |
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| 19 | package org.apache.hadoop.fs; |
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| 20 | |
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| 21 | import java.io.*; |
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| 22 | |
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| 23 | import junit.framework.TestCase; |
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| 24 | import java.util.Date; |
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| 25 | import java.util.StringTokenizer; |
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| 26 | |
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| 27 | import org.apache.commons.logging.*; |
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| 28 | |
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| 29 | import org.apache.hadoop.mapred.*; |
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| 30 | import org.apache.hadoop.util.StringUtils; |
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| 31 | import org.apache.hadoop.io.*; |
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| 32 | import org.apache.hadoop.io.SequenceFile.CompressionType; |
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| 33 | import org.apache.hadoop.conf.*; |
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| 34 | |
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| 35 | /** |
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| 36 | * Distributed i/o benchmark. |
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| 37 | * <p> |
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| 38 | * This test writes into or reads from a specified number of files. |
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| 39 | * File size is specified as a parameter to the test. |
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| 40 | * Each file is accessed in a separate map task. |
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| 41 | * <p> |
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| 42 | * The reducer collects the following statistics: |
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| 43 | * <ul> |
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| 44 | * <li>number of tasks completed</li> |
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| 45 | * <li>number of bytes written/read</li> |
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| 46 | * <li>execution time</li> |
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| 47 | * <li>io rate</li> |
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| 48 | * <li>io rate squared</li> |
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| 49 | * </ul> |
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| 50 | * |
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| 51 | * Finally, the following information is appended to a local file |
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| 52 | * <ul> |
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| 53 | * <li>read or write test</li> |
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| 54 | * <li>date and time the test finished</li> |
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| 55 | * <li>number of files</li> |
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| 56 | * <li>total number of bytes processed</li> |
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| 57 | * <li>throughput in mb/sec (total number of bytes / sum of processing times)</li> |
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| 58 | * <li>average i/o rate in mb/sec per file</li> |
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| 59 | * <li>standard deviation of i/o rate </li> |
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| 60 | * </ul> |
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| 61 | */ |
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| 62 | public class TestDFSIO extends TestCase { |
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| 63 | // Constants |
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| 64 | private static final int TEST_TYPE_READ = 0; |
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| 65 | private static final int TEST_TYPE_WRITE = 1; |
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| 66 | private static final int TEST_TYPE_CLEANUP = 2; |
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| 67 | private static final int DEFAULT_BUFFER_SIZE = 1000000; |
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| 68 | private static final String BASE_FILE_NAME = "test_io_"; |
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| 69 | private static final String DEFAULT_RES_FILE_NAME = "TestDFSIO_results.log"; |
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| 70 | |
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| 71 | private static final Log LOG = FileInputFormat.LOG; |
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| 72 | private static Configuration fsConfig = new Configuration(); |
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| 73 | private static final long MEGA = 0x100000; |
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| 74 | private static String TEST_ROOT_DIR = System.getProperty("test.build.data","/benchmarks/TestDFSIO"); |
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| 75 | private static Path CONTROL_DIR = new Path(TEST_ROOT_DIR, "io_control"); |
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| 76 | private static Path WRITE_DIR = new Path(TEST_ROOT_DIR, "io_write"); |
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| 77 | private static Path READ_DIR = new Path(TEST_ROOT_DIR, "io_read"); |
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| 78 | private static Path DATA_DIR = new Path(TEST_ROOT_DIR, "io_data"); |
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| 79 | |
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| 80 | /** |
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| 81 | * Run the test with default parameters. |
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| 82 | * |
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| 83 | * @throws Exception |
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| 84 | */ |
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| 85 | public void testIOs() throws Exception { |
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| 86 | testIOs(10, 10); |
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| 87 | } |
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| 88 | |
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| 89 | /** |
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| 90 | * Run the test with the specified parameters. |
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| 91 | * |
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| 92 | * @param fileSize file size |
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| 93 | * @param nrFiles number of files |
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| 94 | * @throws IOException |
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| 95 | */ |
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| 96 | public static void testIOs(int fileSize, int nrFiles) |
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| 97 | throws IOException { |
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| 98 | |
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| 99 | FileSystem fs = FileSystem.get(fsConfig); |
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| 100 | |
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| 101 | createControlFile(fs, fileSize, nrFiles); |
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| 102 | writeTest(fs); |
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| 103 | readTest(fs); |
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| 104 | cleanup(fs); |
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| 105 | } |
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| 106 | |
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| 107 | private static void createControlFile( |
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| 108 | FileSystem fs, |
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| 109 | int fileSize, // in MB |
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| 110 | int nrFiles |
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| 111 | ) throws IOException { |
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| 112 | LOG.info("creating control file: "+fileSize+" mega bytes, "+nrFiles+" files"); |
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| 113 | |
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| 114 | fs.delete(CONTROL_DIR, true); |
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| 115 | |
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| 116 | for(int i=0; i < nrFiles; i++) { |
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| 117 | String name = getFileName(i); |
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| 118 | Path controlFile = new Path(CONTROL_DIR, "in_file_" + name); |
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| 119 | SequenceFile.Writer writer = null; |
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| 120 | try { |
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| 121 | writer = SequenceFile.createWriter(fs, fsConfig, controlFile, |
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| 122 | UTF8.class, LongWritable.class, |
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| 123 | CompressionType.NONE); |
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| 124 | writer.append(new UTF8(name), new LongWritable(fileSize)); |
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| 125 | } catch(Exception e) { |
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| 126 | throw new IOException(e.getLocalizedMessage()); |
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| 127 | } finally { |
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| 128 | if (writer != null) |
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| 129 | writer.close(); |
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| 130 | writer = null; |
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| 131 | } |
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| 132 | } |
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| 133 | LOG.info("created control files for: "+nrFiles+" files"); |
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| 134 | } |
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| 135 | |
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| 136 | private static String getFileName(int fIdx) { |
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| 137 | return BASE_FILE_NAME + Integer.toString(fIdx); |
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| 138 | } |
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| 139 | |
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| 140 | /** |
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| 141 | * Write/Read mapper base class. |
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| 142 | * <p> |
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| 143 | * Collects the following statistics per task: |
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| 144 | * <ul> |
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| 145 | * <li>number of tasks completed</li> |
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| 146 | * <li>number of bytes written/read</li> |
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| 147 | * <li>execution time</li> |
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| 148 | * <li>i/o rate</li> |
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| 149 | * <li>i/o rate squared</li> |
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| 150 | * </ul> |
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| 151 | */ |
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| 152 | private abstract static class IOStatMapper extends IOMapperBase { |
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| 153 | IOStatMapper() { |
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| 154 | super(fsConfig); |
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| 155 | } |
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| 156 | |
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| 157 | void collectStats(OutputCollector<UTF8, UTF8> output, |
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| 158 | String name, |
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| 159 | long execTime, |
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| 160 | Object objSize) throws IOException { |
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| 161 | long totalSize = ((Long)objSize).longValue(); |
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| 162 | float ioRateMbSec = (float)totalSize * 1000 / (execTime * MEGA); |
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| 163 | LOG.info("Number of bytes processed = " + totalSize); |
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| 164 | LOG.info("Exec time = " + execTime); |
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| 165 | LOG.info("IO rate = " + ioRateMbSec); |
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| 166 | |
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| 167 | output.collect(new UTF8("l:tasks"), new UTF8(String.valueOf(1))); |
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| 168 | output.collect(new UTF8("l:size"), new UTF8(String.valueOf(totalSize))); |
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| 169 | output.collect(new UTF8("l:time"), new UTF8(String.valueOf(execTime))); |
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| 170 | output.collect(new UTF8("f:rate"), new UTF8(String.valueOf(ioRateMbSec*1000))); |
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| 171 | output.collect(new UTF8("f:sqrate"), new UTF8(String.valueOf(ioRateMbSec*ioRateMbSec*1000))); |
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| 172 | } |
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| 173 | } |
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| 174 | |
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| 175 | /** |
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| 176 | * Write mapper class. |
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| 177 | */ |
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| 178 | public static class WriteMapper extends IOStatMapper { |
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| 179 | |
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| 180 | public WriteMapper() { |
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| 181 | super(); |
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| 182 | for(int i=0; i < bufferSize; i++) |
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| 183 | buffer[i] = (byte)('0' + i % 50); |
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| 184 | } |
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| 185 | |
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| 186 | public Object doIO(Reporter reporter, |
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| 187 | String name, |
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| 188 | long totalSize |
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| 189 | ) throws IOException { |
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| 190 | // create file |
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| 191 | totalSize *= MEGA; |
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| 192 | OutputStream out; |
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| 193 | out = fs.create(new Path(DATA_DIR, name), true, bufferSize); |
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| 194 | |
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| 195 | try { |
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| 196 | // write to the file |
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| 197 | long nrRemaining; |
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| 198 | for (nrRemaining = totalSize; nrRemaining > 0; nrRemaining -= bufferSize) { |
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| 199 | int curSize = (bufferSize < nrRemaining) ? bufferSize : (int)nrRemaining; |
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| 200 | out.write(buffer, 0, curSize); |
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| 201 | reporter.setStatus("writing " + name + "@" + |
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| 202 | (totalSize - nrRemaining) + "/" + totalSize |
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| 203 | + " ::host = " + hostName); |
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| 204 | } |
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| 205 | } finally { |
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| 206 | out.close(); |
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| 207 | } |
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| 208 | return new Long(totalSize); |
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| 209 | } |
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| 210 | } |
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| 211 | |
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| 212 | private static void writeTest(FileSystem fs) |
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| 213 | throws IOException { |
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| 214 | |
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| 215 | fs.delete(DATA_DIR, true); |
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| 216 | fs.delete(WRITE_DIR, true); |
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| 217 | |
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| 218 | runIOTest(WriteMapper.class, WRITE_DIR); |
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| 219 | } |
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| 220 | |
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| 221 | private static void runIOTest( Class<? extends Mapper> mapperClass, |
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| 222 | Path outputDir |
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| 223 | ) throws IOException { |
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| 224 | JobConf job = new JobConf(fsConfig, TestDFSIO.class); |
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| 225 | |
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| 226 | FileInputFormat.setInputPaths(job, CONTROL_DIR); |
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| 227 | job.setInputFormat(SequenceFileInputFormat.class); |
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| 228 | |
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| 229 | job.setMapperClass(mapperClass); |
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| 230 | job.setReducerClass(AccumulatingReducer.class); |
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| 231 | |
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| 232 | FileOutputFormat.setOutputPath(job, outputDir); |
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| 233 | job.setOutputKeyClass(UTF8.class); |
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| 234 | job.setOutputValueClass(UTF8.class); |
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| 235 | job.setNumReduceTasks(1); |
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| 236 | JobClient.runJob(job); |
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| 237 | } |
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| 238 | |
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| 239 | /** |
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| 240 | * Read mapper class. |
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| 241 | */ |
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| 242 | public static class ReadMapper extends IOStatMapper { |
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| 243 | |
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| 244 | public ReadMapper() { |
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| 245 | super(); |
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| 246 | } |
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| 247 | |
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| 248 | public Object doIO(Reporter reporter, |
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| 249 | String name, |
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| 250 | long totalSize |
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| 251 | ) throws IOException { |
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| 252 | totalSize *= MEGA; |
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| 253 | // open file |
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| 254 | DataInputStream in = fs.open(new Path(DATA_DIR, name)); |
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| 255 | try { |
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| 256 | long actualSize = 0; |
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| 257 | for(int curSize = bufferSize; curSize == bufferSize;) { |
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| 258 | curSize = in.read(buffer, 0, bufferSize); |
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| 259 | actualSize += curSize; |
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| 260 | reporter.setStatus("reading " + name + "@" + |
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| 261 | actualSize + "/" + totalSize |
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| 262 | + " ::host = " + hostName); |
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| 263 | } |
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| 264 | } finally { |
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| 265 | in.close(); |
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| 266 | } |
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| 267 | return new Long(totalSize); |
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| 268 | } |
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| 269 | } |
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| 270 | |
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| 271 | private static void readTest(FileSystem fs) throws IOException { |
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| 272 | fs.delete(READ_DIR, true); |
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| 273 | runIOTest(ReadMapper.class, READ_DIR); |
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| 274 | } |
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| 275 | |
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| 276 | private static void sequentialTest( |
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| 277 | FileSystem fs, |
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| 278 | int testType, |
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| 279 | int fileSize, |
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| 280 | int nrFiles |
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| 281 | ) throws Exception { |
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| 282 | IOStatMapper ioer = null; |
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| 283 | if (testType == TEST_TYPE_READ) |
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| 284 | ioer = new ReadMapper(); |
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| 285 | else if (testType == TEST_TYPE_WRITE) |
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| 286 | ioer = new WriteMapper(); |
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| 287 | else |
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| 288 | return; |
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| 289 | for(int i=0; i < nrFiles; i++) |
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| 290 | ioer.doIO(Reporter.NULL, |
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| 291 | BASE_FILE_NAME+Integer.toString(i), |
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| 292 | MEGA*fileSize); |
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| 293 | } |
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| 294 | |
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| 295 | public static void main(String[] args) { |
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| 296 | int testType = TEST_TYPE_READ; |
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| 297 | int bufferSize = DEFAULT_BUFFER_SIZE; |
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| 298 | int fileSize = 1; |
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| 299 | int nrFiles = 1; |
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| 300 | String resFileName = DEFAULT_RES_FILE_NAME; |
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| 301 | boolean isSequential = false; |
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| 302 | |
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| 303 | String version="TestFDSIO.0.0.4"; |
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| 304 | String usage = "Usage: TestFDSIO -read | -write | -clean [-nrFiles N] [-fileSize MB] [-resFile resultFileName] [-bufferSize Bytes] "; |
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| 305 | |
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| 306 | System.out.println(version); |
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| 307 | if (args.length == 0) { |
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| 308 | System.err.println(usage); |
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| 309 | System.exit(-1); |
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| 310 | } |
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| 311 | for (int i = 0; i < args.length; i++) { // parse command line |
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| 312 | if (args[i].startsWith("-read")) { |
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| 313 | testType = TEST_TYPE_READ; |
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| 314 | } else if (args[i].equals("-write")) { |
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| 315 | testType = TEST_TYPE_WRITE; |
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| 316 | } else if (args[i].equals("-clean")) { |
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| 317 | testType = TEST_TYPE_CLEANUP; |
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| 318 | } else if (args[i].startsWith("-seq")) { |
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| 319 | isSequential = true; |
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| 320 | } else if (args[i].equals("-nrFiles")) { |
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| 321 | nrFiles = Integer.parseInt(args[++i]); |
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| 322 | } else if (args[i].equals("-fileSize")) { |
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| 323 | fileSize = Integer.parseInt(args[++i]); |
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| 324 | } else if (args[i].equals("-bufferSize")) { |
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| 325 | bufferSize = Integer.parseInt(args[++i]); |
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| 326 | } else if (args[i].equals("-resFile")) { |
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| 327 | resFileName = args[++i]; |
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| 328 | } |
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| 329 | } |
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| 330 | |
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| 331 | LOG.info("nrFiles = " + nrFiles); |
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| 332 | LOG.info("fileSize (MB) = " + fileSize); |
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| 333 | LOG.info("bufferSize = " + bufferSize); |
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| 334 | |
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| 335 | try { |
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| 336 | fsConfig.setInt("test.io.file.buffer.size", bufferSize); |
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| 337 | FileSystem fs = FileSystem.get(fsConfig); |
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| 338 | |
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| 339 | if (isSequential) { |
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| 340 | long tStart = System.currentTimeMillis(); |
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| 341 | sequentialTest(fs, testType, fileSize, nrFiles); |
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| 342 | long execTime = System.currentTimeMillis() - tStart; |
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| 343 | String resultLine = "Seq Test exec time sec: " + (float)execTime / 1000; |
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| 344 | LOG.info(resultLine); |
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| 345 | return; |
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| 346 | } |
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| 347 | if (testType == TEST_TYPE_CLEANUP) { |
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| 348 | cleanup(fs); |
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| 349 | return; |
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| 350 | } |
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| 351 | createControlFile(fs, fileSize, nrFiles); |
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| 352 | long tStart = System.currentTimeMillis(); |
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| 353 | if (testType == TEST_TYPE_WRITE) |
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| 354 | writeTest(fs); |
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| 355 | if (testType == TEST_TYPE_READ) |
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| 356 | readTest(fs); |
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| 357 | long execTime = System.currentTimeMillis() - tStart; |
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| 358 | |
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| 359 | analyzeResult(fs, testType, execTime, resFileName); |
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| 360 | } catch(Exception e) { |
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| 361 | System.err.print(StringUtils.stringifyException(e)); |
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| 362 | System.exit(-1); |
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| 363 | } |
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| 364 | } |
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| 365 | |
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| 366 | private static void analyzeResult( FileSystem fs, |
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| 367 | int testType, |
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| 368 | long execTime, |
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| 369 | String resFileName |
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| 370 | ) throws IOException { |
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| 371 | Path reduceFile; |
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| 372 | if (testType == TEST_TYPE_WRITE) |
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| 373 | reduceFile = new Path(WRITE_DIR, "part-00000"); |
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| 374 | else |
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| 375 | reduceFile = new Path(READ_DIR, "part-00000"); |
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| 376 | DataInputStream in; |
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| 377 | in = new DataInputStream(fs.open(reduceFile)); |
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| 378 | |
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| 379 | BufferedReader lines; |
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| 380 | lines = new BufferedReader(new InputStreamReader(in)); |
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| 381 | long tasks = 0; |
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| 382 | long size = 0; |
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| 383 | long time = 0; |
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| 384 | float rate = 0; |
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| 385 | float sqrate = 0; |
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| 386 | String line; |
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| 387 | while((line = lines.readLine()) != null) { |
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| 388 | StringTokenizer tokens = new StringTokenizer(line, " \t\n\r\f%"); |
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| 389 | String attr = tokens.nextToken(); |
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| 390 | if (attr.endsWith(":tasks")) |
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| 391 | tasks = Long.parseLong(tokens.nextToken()); |
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| 392 | else if (attr.endsWith(":size")) |
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| 393 | size = Long.parseLong(tokens.nextToken()); |
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| 394 | else if (attr.endsWith(":time")) |
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| 395 | time = Long.parseLong(tokens.nextToken()); |
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| 396 | else if (attr.endsWith(":rate")) |
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| 397 | rate = Float.parseFloat(tokens.nextToken()); |
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| 398 | else if (attr.endsWith(":sqrate")) |
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| 399 | sqrate = Float.parseFloat(tokens.nextToken()); |
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| 400 | } |
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| 401 | |
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| 402 | double med = rate / 1000 / tasks; |
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| 403 | double stdDev = Math.sqrt(Math.abs(sqrate / 1000 / tasks - med*med)); |
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| 404 | String resultLines[] = { |
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| 405 | "----- TestDFSIO ----- : " + ((testType == TEST_TYPE_WRITE) ? "write" : |
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| 406 | (testType == TEST_TYPE_READ) ? "read" : |
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| 407 | "unknown"), |
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| 408 | " Date & time: " + new Date(System.currentTimeMillis()), |
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| 409 | " Number of files: " + tasks, |
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| 410 | "Total MBytes processed: " + size/MEGA, |
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| 411 | " Throughput mb/sec: " + size * 1000.0 / (time * MEGA), |
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| 412 | "Average IO rate mb/sec: " + med, |
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| 413 | " IO rate std deviation: " + stdDev, |
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| 414 | " Test exec time sec: " + (float)execTime / 1000, |
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| 415 | "" }; |
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| 416 | |
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| 417 | PrintStream res = new PrintStream( |
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| 418 | new FileOutputStream( |
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| 419 | new File(resFileName), true)); |
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| 420 | for(int i = 0; i < resultLines.length; i++) { |
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| 421 | LOG.info(resultLines[i]); |
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| 422 | res.println(resultLines[i]); |
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| 423 | } |
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| 424 | } |
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| 425 | |
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| 426 | private static void cleanup(FileSystem fs) throws IOException { |
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| 427 | LOG.info("Cleaning up test files"); |
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| 428 | fs.delete(new Path(TEST_ROOT_DIR), true); |
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| 429 | } |
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| 430 | } |
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