/**
* 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.fs;
import java.io.BufferedReader;
import java.io.Closeable;
import java.io.DataInputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PrintStream;
import java.util.Date;
import java.util.Random;
import java.util.StringTokenizer;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hdfs.DFSConfigKeys;
import org.apache.hadoop.hdfs.MiniDFSCluster;
import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.io.SequenceFile;
import org.apache.hadoop.io.SequenceFile.CompressionType;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.io.compress.CompressionCodec;
import org.apache.hadoop.mapred.FileInputFormat;
import org.apache.hadoop.mapred.FileOutputFormat;
import org.apache.hadoop.mapred.JobClient;
import org.apache.hadoop.mapred.JobConf;
import org.apache.hadoop.mapred.Mapper;
import org.apache.hadoop.mapred.OutputCollector;
import org.apache.hadoop.mapred.Reporter;
import org.apache.hadoop.mapred.SequenceFileInputFormat;
import org.apache.hadoop.util.ReflectionUtils;
import org.apache.hadoop.util.StringUtils;
import org.apache.hadoop.util.Tool;
import org.apache.hadoop.util.ToolRunner;
import org.junit.AfterClass;
import org.junit.BeforeClass;
import org.junit.Test;
/**
* Distributed i/o benchmark.
* <p>
* This test writes into or reads from a specified number of files.
* Number of bytes to write or read is specified as a parameter to the test.
* Each file is accessed in a separate map task.
* <p>
* The reducer collects the following statistics:
* <ul>
* <li>number of tasks completed</li>
* <li>number of bytes written/read</li>
* <li>execution time</li>
* <li>io rate</li>
* <li>io rate squared</li>
* </ul>
*
* Finally, the following information is appended to a local file
* <ul>
* <li>read or write test</li>
* <li>date and time the test finished</li>
* <li>number of files</li>
* <li>total number of bytes processed</li>
* <li>throughput in mb/sec (total number of bytes / sum of processing times)</li>
* <li>average i/o rate in mb/sec per file</li>
* <li>standard deviation of i/o rate </li>
* </ul>
*/
public class TestDFSIO implements Tool {
// Constants
private static final Log LOG = LogFactory.getLog(TestDFSIO.class);
private static final int DEFAULT_BUFFER_SIZE = 1000000;
private static final String BASE_FILE_NAME = "test_io_";
private static final String DEFAULT_RES_FILE_NAME = "TestDFSIO_results.log";
private static final long MEGA = ByteMultiple.MB.value();
private static final int DEFAULT_NR_BYTES = 1;
private static final int DEFAULT_NR_FILES = 4;
private static final String USAGE =
"Usage: " + TestDFSIO.class.getSimpleName() +
" [genericOptions]" +
" -read [-random | -backward | -skip [-skipSize Size]] |" +
" -write | -append | -clean" +
" [-compression codecClassName]" +
" [-nrFiles N]" +
" [-size Size[B|KB|MB|GB|TB]]" +
" [-resFile resultFileName] [-bufferSize Bytes]" +
" [-rootDir]";
private Configuration config;
static{
Configuration.addDefaultResource("hdfs-default.xml");
Configuration.addDefaultResource("hdfs-site.xml");
Configuration.addDefaultResource("mapred-default.xml");
Configuration.addDefaultResource("mapred-site.xml");
}
private static enum TestType {
TEST_TYPE_READ("read"),
TEST_TYPE_WRITE("write"),
TEST_TYPE_CLEANUP("cleanup"),
TEST_TYPE_APPEND("append"),
TEST_TYPE_READ_RANDOM("random read"),
TEST_TYPE_READ_BACKWARD("backward read"),
TEST_TYPE_READ_SKIP("skip read");
private String type;
private TestType(String t) {
type = t;
}
@Override // String
public String toString() {
return type;
}
}
static enum ByteMultiple {
B(1L),
KB(0x400L),
MB(0x100000L),
GB(0x40000000L),
TB(0x10000000000L);
private long multiplier;
private ByteMultiple(long mult) {
multiplier = mult;
}
long value() {
return multiplier;
}
static ByteMultiple parseString(String sMultiple) {
if(sMultiple == null || sMultiple.isEmpty()) // MB by default
return MB;
String sMU = sMultiple.toUpperCase();
if(B.name().toUpperCase().endsWith(sMU))
return B;
if(KB.name().toUpperCase().endsWith(sMU))
return KB;
if(MB.name().toUpperCase().endsWith(sMU))
return MB;
if(GB.name().toUpperCase().endsWith(sMU))
return GB;
if(TB.name().toUpperCase().endsWith(sMU))
return TB;
throw new IllegalArgumentException("Unsupported ByteMultiple "+sMultiple);
}
}
public TestDFSIO() {
this.config = new Configuration();
}
private static String getBaseDir(Configuration conf) {
return conf.get("test.build.data","/benchmarks/TestDFSIO");
}
private static Path getControlDir(Configuration conf) {
return new Path(getBaseDir(conf), "io_control");
}
private static Path getWriteDir(Configuration conf) {
return new Path(getBaseDir(conf), "io_write");
}
private static Path getReadDir(Configuration conf) {
return new Path(getBaseDir(conf), "io_read");
}
private static Path getAppendDir(Configuration conf) {
return new Path(getBaseDir(conf), "io_append");
}
private static Path getRandomReadDir(Configuration conf) {
return new Path(getBaseDir(conf), "io_random_read");
}
private static Path getDataDir(Configuration conf) {
return new Path(getBaseDir(conf), "io_data");
}
private static MiniDFSCluster cluster;
private static TestDFSIO bench;
@BeforeClass
public static void beforeClass() throws Exception {
bench = new TestDFSIO();
bench.getConf().setBoolean(DFSConfigKeys.DFS_SUPPORT_APPEND_KEY, true);
cluster = new MiniDFSCluster.Builder(bench.getConf())
.numDataNodes(2)
.format(true)
.build();
FileSystem fs = cluster.getFileSystem();
bench.createControlFile(fs, DEFAULT_NR_BYTES, DEFAULT_NR_FILES);
/** Check write here, as it is required for other tests */
testWrite();
}
@AfterClass
public static void afterClass() throws Exception {
if(cluster == null)
return;
FileSystem fs = cluster.getFileSystem();
bench.cleanup(fs);
cluster.shutdown();
}
public static void testWrite() throws Exception {
FileSystem fs = cluster.getFileSystem();
long tStart = System.currentTimeMillis();
bench.writeTest(fs);
long execTime = System.currentTimeMillis() - tStart;
bench.analyzeResult(fs, TestType.TEST_TYPE_WRITE, execTime);
}
@Test (timeout = 3000)
public void testRead() throws Exception {
FileSystem fs = cluster.getFileSystem();
long tStart = System.currentTimeMillis();
bench.readTest(fs);
long execTime = System.currentTimeMillis() - tStart;
bench.analyzeResult(fs, TestType.TEST_TYPE_READ, execTime);
}
@Test (timeout = 3000)
public void testReadRandom() throws Exception {
FileSystem fs = cluster.getFileSystem();
long tStart = System.currentTimeMillis();
bench.getConf().setLong("test.io.skip.size", 0);
bench.randomReadTest(fs);
long execTime = System.currentTimeMillis() - tStart;
bench.analyzeResult(fs, TestType.TEST_TYPE_READ_RANDOM, execTime);
}
@Test (timeout = 3000)
public void testReadBackward() throws Exception {
FileSystem fs = cluster.getFileSystem();
long tStart = System.currentTimeMillis();
bench.getConf().setLong("test.io.skip.size", -DEFAULT_BUFFER_SIZE);
bench.randomReadTest(fs);
long execTime = System.currentTimeMillis() - tStart;
bench.analyzeResult(fs, TestType.TEST_TYPE_READ_BACKWARD, execTime);
}
@Test (timeout = 3000)
public void testReadSkip() throws Exception {
FileSystem fs = cluster.getFileSystem();
long tStart = System.currentTimeMillis();
bench.getConf().setLong("test.io.skip.size", 1);
bench.randomReadTest(fs);
long execTime = System.currentTimeMillis() - tStart;
bench.analyzeResult(fs, TestType.TEST_TYPE_READ_SKIP, execTime);
}
@Test (timeout = 6000)
public void testAppend() throws Exception {
FileSystem fs = cluster.getFileSystem();
long tStart = System.currentTimeMillis();
bench.appendTest(fs);
long execTime = System.currentTimeMillis() - tStart;
bench.analyzeResult(fs, TestType.TEST_TYPE_APPEND, execTime);
}
@SuppressWarnings("deprecation")
private void createControlFile(FileSystem fs,
long nrBytes, // in bytes
int nrFiles
) throws IOException {
LOG.info("creating control file: "+nrBytes+" bytes, "+nrFiles+" files");
Path controlDir = getControlDir(config);
fs.delete(controlDir, true);
for(int i=0; i < nrFiles; i++) {
String name = getFileName(i);
Path controlFile = new Path(controlDir, "in_file_" + name);
SequenceFile.Writer writer = null;
try {
writer = SequenceFile.createWriter(fs, config, controlFile,
Text.class, LongWritable.class,
CompressionType.NONE);
writer.append(new Text(name), new LongWritable(nrBytes));
} catch(Exception e) {
throw new IOException(e.getLocalizedMessage());
} finally {
if (writer != null)
writer.close();
writer = null;
}
}
LOG.info("created control files for: "+nrFiles+" files");
}
private static String getFileName(int fIdx) {
return BASE_FILE_NAME + Integer.toString(fIdx);
}
/**
* Write/Read mapper base class.
* <p>
* Collects the following statistics per task:
* <ul>
* <li>number of tasks completed</li>
* <li>number of bytes written/read</li>
* <li>execution time</li>
* <li>i/o rate</li>
* <li>i/o rate squared</li>
* </ul>
*/
private abstract static class IOStatMapper extends IOMapperBase<Long> {
protected CompressionCodec compressionCodec;
IOStatMapper() {
}
@Override // Mapper
public void configure(JobConf conf) {
super.configure(conf);
// grab compression
String compression = getConf().get("test.io.compression.class", null);
Class<? extends CompressionCodec> codec;
// try to initialize codec
try {
codec = (compression == null) ? null :
Class.forName(compression).asSubclass(CompressionCodec.class);
} catch(Exception e) {
throw new RuntimeException("Compression codec not found: ", e);
}
if(codec != null) {
compressionCodec = (CompressionCodec)
ReflectionUtils.newInstance(codec, getConf());
}
}
@Override // IOMapperBase
void collectStats(OutputCollector<Text, Text> output,
String name,
long execTime,
Long objSize) throws IOException {
long totalSize = objSize.longValue();
float ioRateMbSec = (float)totalSize * 1000 / (execTime * MEGA);
LOG.info("Number of bytes processed = " + totalSize);
LOG.info("Exec time = " + execTime);
LOG.info("IO rate = " + ioRateMbSec);
output.collect(new Text(AccumulatingReducer.VALUE_TYPE_LONG + "tasks"),
new Text(String.valueOf(1)));
output.collect(new Text(AccumulatingReducer.VALUE_TYPE_LONG + "size"),
new Text(String.valueOf(totalSize)));
output.collect(new Text(AccumulatingReducer.VALUE_TYPE_LONG + "time"),
new Text(String.valueOf(execTime)));
output.collect(new Text(AccumulatingReducer.VALUE_TYPE_FLOAT + "rate"),
new Text(String.valueOf(ioRateMbSec*1000)));
output.collect(new Text(AccumulatingReducer.VALUE_TYPE_FLOAT + "sqrate"),
new Text(String.valueOf(ioRateMbSec*ioRateMbSec*1000)));
}
}
/**
* Write mapper class.
*/
public static class WriteMapper extends IOStatMapper {
public WriteMapper() {
for(int i=0; i < bufferSize; i++)
buffer[i] = (byte)('0' + i % 50);
}
@Override // IOMapperBase
public Closeable getIOStream(String name) throws IOException {
// create file
OutputStream out =
fs.create(new Path(getDataDir(getConf()), name), true, bufferSize);
if(compressionCodec != null)
out = compressionCodec.createOutputStream(out);
LOG.info("out = " + out.getClass().getName());
return out;
}
@Override // IOMapperBase
public Long doIO(Reporter reporter,
String name,
long totalSize // in bytes
) throws IOException {
OutputStream out = (OutputStream)this.stream;
// write to the file
long nrRemaining;
for (nrRemaining = totalSize; nrRemaining > 0; nrRemaining -= bufferSize) {
int curSize = (bufferSize < nrRemaining) ? bufferSize : (int)nrRemaining;
out.write(buffer, 0, curSize);
reporter.setStatus("writing " + name + "@" +
(totalSize - nrRemaining) + "/" + totalSize
+ " ::host = " + hostName);
}
return Long.valueOf(totalSize);
}
}
private void writeTest(FileSystem fs) throws IOException {
Path writeDir = getWriteDir(config);
fs.delete(getDataDir(config), true);
fs.delete(writeDir, true);
runIOTest(WriteMapper.class, writeDir);
}
private void runIOTest(
Class<? extends Mapper<Text, LongWritable, Text, Text>> mapperClass,
Path outputDir) throws IOException {
JobConf job = new JobConf(config, TestDFSIO.class);
FileInputFormat.setInputPaths(job, getControlDir(config));
job.setInputFormat(SequenceFileInputFormat.class);
job.setMapperClass(mapperClass);
job.setReducerClass(AccumulatingReducer.class);
FileOutputFormat.setOutputPath(job, outputDir);
job.setOutputKeyClass(Text.class);
job.setOutputValueClass(Text.class);
job.setNumReduceTasks(1);
JobClient.runJob(job);
}
/**
* Append mapper class.
*/
public static class AppendMapper extends IOStatMapper {
public AppendMapper() {
for(int i=0; i < bufferSize; i++)
buffer[i] = (byte)('0' + i % 50);
}
@Override // IOMapperBase
public Closeable getIOStream(String name) throws IOException {
// open file for append
OutputStream out =
fs.append(new Path(getDataDir(getConf()), name), bufferSize);
if(compressionCodec != null)
out = compressionCodec.createOutputStream(out);
LOG.info("out = " + out.getClass().getName());
return out;
}
@Override // IOMapperBase
public Long doIO(Reporter reporter,
String name,
long totalSize // in bytes
) throws IOException {
OutputStream out = (OutputStream)this.stream;
// write to the file
long nrRemaining;
for (nrRemaining = totalSize; nrRemaining > 0; nrRemaining -= bufferSize) {
int curSize = (bufferSize < nrRemaining) ? bufferSize : (int)nrRemaining;
out.write(buffer, 0, curSize);
reporter.setStatus("writing " + name + "@" +
(totalSize - nrRemaining) + "/" + totalSize
+ " ::host = " + hostName);
}
return Long.valueOf(totalSize);
}
}
private void appendTest(FileSystem fs) throws IOException {
Path appendDir = getAppendDir(config);
fs.delete(appendDir, true);
runIOTest(AppendMapper.class, appendDir);
}
/**
* Read mapper class.
*/
public static class ReadMapper extends IOStatMapper {
public ReadMapper() {
}
@Override // IOMapperBase
public Closeable getIOStream(String name) throws IOException {
// open file
InputStream in = fs.open(new Path(getDataDir(getConf()), name));
if(compressionCodec != null)
in = compressionCodec.createInputStream(in);
LOG.info("in = " + in.getClass().getName());
return in;
}
@Override // IOMapperBase
public Long doIO(Reporter reporter,
String name,
long totalSize // in bytes
) throws IOException {
InputStream in = (InputStream)this.stream;
long actualSize = 0;
while (actualSize < totalSize) {
int curSize = in.read(buffer, 0, bufferSize);
if(curSize < 0) break;
actualSize += curSize;
reporter.setStatus("reading " + name + "@" +
actualSize + "/" + totalSize
+ " ::host = " + hostName);
}
return Long.valueOf(actualSize);
}
}
private void readTest(FileSystem fs) throws IOException {
Path readDir = getReadDir(config);
fs.delete(readDir, true);
runIOTest(ReadMapper.class, readDir);
}
/**
* Mapper class for random reads.
* The mapper chooses a position in the file and reads bufferSize
* bytes starting at the chosen position.
* It stops after reading the totalSize bytes, specified by -size.
*
* There are three type of reads.
* 1) Random read always chooses a random position to read from: skipSize = 0
* 2) Backward read reads file in reverse order : skipSize < 0
* 3) Skip-read skips skipSize bytes after every read : skipSize > 0
*/
public static class RandomReadMapper extends IOStatMapper {
private Random rnd;
private long fileSize;
private long skipSize;
@Override // Mapper
public void configure(JobConf conf) {
super.configure(conf);
skipSize = conf.getLong("test.io.skip.size", 0);
}
public RandomReadMapper() {
rnd = new Random();
}
@Override // IOMapperBase
public Closeable getIOStream(String name) throws IOException {
Path filePath = new Path(getDataDir(getConf()), name);
this.fileSize = fs.getFileStatus(filePath).getLen();
InputStream in = fs.open(filePath);
if(compressionCodec != null)
in = new FSDataInputStream(compressionCodec.createInputStream(in));
LOG.info("in = " + in.getClass().getName());
LOG.info("skipSize = " + skipSize);
return in;
}
@Override // IOMapperBase
public Long doIO(Reporter reporter,
String name,
long totalSize // in bytes
) throws IOException {
PositionedReadable in = (PositionedReadable)this.stream;
long actualSize = 0;
for(long pos = nextOffset(-1);
actualSize < totalSize; pos = nextOffset(pos)) {
int curSize = in.read(pos, buffer, 0, bufferSize);
if(curSize < 0) break;
actualSize += curSize;
reporter.setStatus("reading " + name + "@" +
actualSize + "/" + totalSize
+ " ::host = " + hostName);
}
return Long.valueOf(actualSize);
}
/**
* Get next offset for reading.
* If current < 0 then choose initial offset according to the read type.
*
* @param current offset
* @return
*/
private long nextOffset(long current) {
if(skipSize == 0)
return rnd.nextInt((int)(fileSize));
if(skipSize > 0)
return (current < 0) ? 0 : (current + bufferSize + skipSize);
// skipSize < 0
return (current < 0) ? Math.max(0, fileSize - bufferSize) :
Math.max(0, current + skipSize);
}
}
private void randomReadTest(FileSystem fs) throws IOException {
Path readDir = getRandomReadDir(config);
fs.delete(readDir, true);
runIOTest(RandomReadMapper.class, readDir);
}
private void sequentialTest(FileSystem fs,
TestType testType,
long fileSize, // in bytes
int nrFiles
) throws IOException {
IOStatMapper ioer = null;
switch(testType) {
case TEST_TYPE_READ:
ioer = new ReadMapper();
break;
case TEST_TYPE_WRITE:
ioer = new WriteMapper();
break;
case TEST_TYPE_APPEND:
ioer = new AppendMapper();
break;
case TEST_TYPE_READ_RANDOM:
case TEST_TYPE_READ_BACKWARD:
case TEST_TYPE_READ_SKIP:
ioer = new RandomReadMapper();
break;
default:
return;
}
for(int i=0; i < nrFiles; i++)
ioer.doIO(Reporter.NULL,
BASE_FILE_NAME+Integer.toString(i),
fileSize);
}
public static void main(String[] args) {
TestDFSIO bench = new TestDFSIO();
int res = -1;
try {
res = ToolRunner.run(bench, args);
} catch(Exception e) {
System.err.print(StringUtils.stringifyException(e));
res = -2;
}
if(res == -1)
System.err.print(USAGE);
System.exit(res);
}
@Override // Tool
public int run(String[] args) throws IOException {
TestType testType = null;
int bufferSize = DEFAULT_BUFFER_SIZE;
long nrBytes = 1*MEGA;
int nrFiles = 1;
long skipSize = 0;
String resFileName = DEFAULT_RES_FILE_NAME;
String compressionClass = null;
boolean isSequential = false;
String version = TestDFSIO.class.getSimpleName() + ".1.7";
LOG.info(version);
if (args.length == 0) {
System.err.println("Missing arguments.");
return -1;
}
for (int i = 0; i < args.length; i++) { // parse command line
if (args[i].startsWith("-read")) {
testType = TestType.TEST_TYPE_READ;
} else if (args[i].equals("-write")) {
testType = TestType.TEST_TYPE_WRITE;
} else if (args[i].equals("-append")) {
testType = TestType.TEST_TYPE_APPEND;
} else if (args[i].equals("-random")) {
if(testType != TestType.TEST_TYPE_READ) return -1;
testType = TestType.TEST_TYPE_READ_RANDOM;
} else if (args[i].equals("-backward")) {
if(testType != TestType.TEST_TYPE_READ) return -1;
testType = TestType.TEST_TYPE_READ_BACKWARD;
} else if (args[i].equals("-skip")) {
if(testType != TestType.TEST_TYPE_READ) return -1;
testType = TestType.TEST_TYPE_READ_SKIP;
} else if (args[i].equals("-clean")) {
testType = TestType.TEST_TYPE_CLEANUP;
} else if (args[i].startsWith("-seq")) {
isSequential = true;
} else if (args[i].startsWith("-compression")) {
compressionClass = args[++i];
} else if (args[i].equals("-nrFiles")) {
nrFiles = Integer.parseInt(args[++i]);
} else if (args[i].equals("-fileSize") || args[i].equals("-size")) {
nrBytes = parseSize(args[++i]);
} else if (args[i].equals("-skipSize")) {
skipSize = parseSize(args[++i]);
} else if (args[i].equals("-bufferSize")) {
bufferSize = Integer.parseInt(args[++i]);
} else if (args[i].equals("-resFile")) {
resFileName = args[++i];
} else {
System.err.println("Illegal argument: " + args[i]);
return -1;
}
}
if(testType == null)
return -1;
if(testType == TestType.TEST_TYPE_READ_BACKWARD)
skipSize = -bufferSize;
else if(testType == TestType.TEST_TYPE_READ_SKIP && skipSize == 0)
skipSize = bufferSize;
LOG.info("nrFiles = " + nrFiles);
LOG.info("nrBytes (MB) = " + toMB(nrBytes));
LOG.info("bufferSize = " + bufferSize);
if(skipSize > 0)
LOG.info("skipSize = " + skipSize);
LOG.info("baseDir = " + getBaseDir(config));
if(compressionClass != null) {
config.set("test.io.compression.class", compressionClass);
LOG.info("compressionClass = " + compressionClass);
}
config.setInt("test.io.file.buffer.size", bufferSize);
config.setLong("test.io.skip.size", skipSize);
config.setBoolean(DFSConfigKeys.DFS_SUPPORT_APPEND_KEY, true);
FileSystem fs = FileSystem.get(config);
if (isSequential) {
long tStart = System.currentTimeMillis();
sequentialTest(fs, testType, nrBytes, nrFiles);
long execTime = System.currentTimeMillis() - tStart;
String resultLine = "Seq Test exec time sec: " + (float)execTime / 1000;
LOG.info(resultLine);
return 0;
}
if (testType == TestType.TEST_TYPE_CLEANUP) {
cleanup(fs);
return 0;
}
createControlFile(fs, nrBytes, nrFiles);
long tStart = System.currentTimeMillis();
switch(testType) {
case TEST_TYPE_WRITE:
writeTest(fs);
break;
case TEST_TYPE_READ:
readTest(fs);
break;
case TEST_TYPE_APPEND:
appendTest(fs);
break;
case TEST_TYPE_READ_RANDOM:
case TEST_TYPE_READ_BACKWARD:
case TEST_TYPE_READ_SKIP:
randomReadTest(fs);
}
long execTime = System.currentTimeMillis() - tStart;
analyzeResult(fs, testType, execTime, resFileName);
return 0;
}
@Override // Configurable
public Configuration getConf() {
return this.config;
}
@Override // Configurable
public void setConf(Configuration conf) {
this.config = conf;
}
/**
* Returns size in bytes.
*
* @param arg = {d}[B|KB|MB|GB|TB]
* @return
*/
static long parseSize(String arg) {
String[] args = arg.split("\\D", 2); // get digits
assert args.length <= 2;
long nrBytes = Long.parseLong(args[0]);
String bytesMult = arg.substring(args[0].length()); // get byte multiple
return nrBytes * ByteMultiple.parseString(bytesMult).value();
}
static float toMB(long bytes) {
return ((float)bytes)/MEGA;
}
private void analyzeResult( FileSystem fs,
TestType testType,
long execTime,
String resFileName
) throws IOException {
Path reduceFile = getReduceFilePath(testType);
long tasks = 0;
long size = 0;
long time = 0;
float rate = 0;
float sqrate = 0;
DataInputStream in = null;
BufferedReader lines = null;
try {
in = new DataInputStream(fs.open(reduceFile));
lines = new BufferedReader(new InputStreamReader(in));
String line;
while((line = lines.readLine()) != null) {
StringTokenizer tokens = new StringTokenizer(line, " \t\n\r\f%");
String attr = tokens.nextToken();
if (attr.endsWith(":tasks"))
tasks = Long.parseLong(tokens.nextToken());
else if (attr.endsWith(":size"))
size = Long.parseLong(tokens.nextToken());
else if (attr.endsWith(":time"))
time = Long.parseLong(tokens.nextToken());
else if (attr.endsWith(":rate"))
rate = Float.parseFloat(tokens.nextToken());
else if (attr.endsWith(":sqrate"))
sqrate = Float.parseFloat(tokens.nextToken());
}
} finally {
if(in != null) in.close();
if(lines != null) lines.close();
}
double med = rate / 1000 / tasks;
double stdDev = Math.sqrt(Math.abs(sqrate / 1000 / tasks - med*med));
String resultLines[] = {
"----- TestDFSIO ----- : " + testType,
" Date & time: " + new Date(System.currentTimeMillis()),
" Number of files: " + tasks,
"Total MBytes processed: " + toMB(size),
" Throughput mb/sec: " + size * 1000.0 / (time * MEGA),
"Average IO rate mb/sec: " + med,
" IO rate std deviation: " + stdDev,
" Test exec time sec: " + (float)execTime / 1000,
"" };
PrintStream res = null;
try {
res = new PrintStream(new FileOutputStream(new File(resFileName), true));
for(int i = 0; i < resultLines.length; i++) {
LOG.info(resultLines[i]);
res.println(resultLines[i]);
}
} finally {
if(res != null) res.close();
}
}
private Path getReduceFilePath(TestType testType) {
switch(testType) {
case TEST_TYPE_WRITE:
return new Path(getWriteDir(config), "part-00000");
case TEST_TYPE_APPEND:
return new Path(getAppendDir(config), "part-00000");
case TEST_TYPE_READ:
return new Path(getReadDir(config), "part-00000");
case TEST_TYPE_READ_RANDOM:
case TEST_TYPE_READ_BACKWARD:
case TEST_TYPE_READ_SKIP:
return new Path(getRandomReadDir(config), "part-00000");
}
return null;
}
private void analyzeResult(FileSystem fs, TestType testType, long execTime)
throws IOException {
analyzeResult(fs, testType, execTime, DEFAULT_RES_FILE_NAME);
}
private void cleanup(FileSystem fs)
throws IOException {
LOG.info("Cleaning up test files");
fs.delete(new Path(getBaseDir(config)), true);
}
}