BenchmarkThroughput.java
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上传日期:2018-01-08
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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;
- import java.io.File;
- import java.io.FileInputStream;
- import java.io.FileOutputStream;
- import java.io.IOException;
- import java.io.InputStream;
- import java.io.OutputStream;
- 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.conf.Configured;
- import org.apache.hadoop.fs.ChecksumFileSystem;
- import org.apache.hadoop.fs.FileSystem;
- import org.apache.hadoop.fs.LocalDirAllocator;
- import org.apache.hadoop.fs.Path;
- import org.apache.hadoop.util.Tool;
- import org.apache.hadoop.util.ToolRunner;
- import org.apache.log4j.Level;
- /**
- * This class benchmarks the performance of the local file system, raw local
- * file system and HDFS at reading and writing files. The user should invoke
- * the main of this class and optionally include a repetition count.
- */
- public class BenchmarkThroughput extends Configured implements Tool {
- // the property in the config that specifies a working directory
- private LocalDirAllocator dir;
- private long startTime;
- // the size of the buffer to use
- private int BUFFER_SIZE;
- private void resetMeasurements() {
- startTime = System.currentTimeMillis();
- }
- private void printMeasurements() {
- System.out.println(" time: " +
- ((System.currentTimeMillis() - startTime)/1000));
- }
- private Path writeLocalFile(String name, Configuration conf,
- long total) throws IOException {
- Path path = dir.getLocalPathForWrite(name, total, conf);
- System.out.print("Writing " + name);
- resetMeasurements();
- OutputStream out = new FileOutputStream(new File(path.toString()));
- byte[] data = new byte[BUFFER_SIZE];
- for(long size=0; size < total; size += BUFFER_SIZE) {
- out.write(data);
- }
- out.close();
- printMeasurements();
- return path;
- }
- private void readLocalFile(Path path,
- String name,
- Configuration conf) throws IOException {
- System.out.print("Reading " + name);
- resetMeasurements();
- InputStream in = new FileInputStream(new File(path.toString()));
- byte[] data = new byte[BUFFER_SIZE];
- long size = 0;
- while (size >= 0) {
- size = in.read(data);
- }
- in.close();
- printMeasurements();
- }
- private void writeAndReadLocalFile(String name,
- Configuration conf,
- long size
- ) throws IOException {
- Path f = null;
- try {
- f = writeLocalFile(name, conf, size);
- readLocalFile(f, name, conf);
- } finally {
- if (f != null) {
- new File(f.toString()).delete();
- }
- }
- }
- private Path writeFile(FileSystem fs,
- String name,
- Configuration conf,
- long total
- ) throws IOException {
- Path f = dir.getLocalPathForWrite(name, total, conf);
- System.out.print("Writing " + name);
- resetMeasurements();
- OutputStream out = fs.create(f);
- byte[] data = new byte[BUFFER_SIZE];
- for(long size = 0; size < total; size += BUFFER_SIZE) {
- out.write(data);
- }
- out.close();
- printMeasurements();
- return f;
- }
- private void readFile(FileSystem fs,
- Path f,
- String name,
- Configuration conf
- ) throws IOException {
- System.out.print("Reading " + name);
- resetMeasurements();
- InputStream in = fs.open(f);
- byte[] data = new byte[BUFFER_SIZE];
- long val = 0;
- while (val >= 0) {
- val = in.read(data);
- }
- in.close();
- printMeasurements();
- }
- private void writeAndReadFile(FileSystem fs,
- String name,
- Configuration conf,
- long size
- ) throws IOException {
- Path f = null;
- try {
- f = writeFile(fs, name, conf, size);
- readFile(fs, f, name, conf);
- } finally {
- try {
- if (f != null) {
- fs.delete(f, true);
- }
- } catch (IOException ie) {
- // IGNORE
- }
- }
- }
- private static void printUsage() {
- ToolRunner.printGenericCommandUsage(System.err);
- System.err.println("Usage: dfsthroughput [#reps]");
- System.err.println("Config properties:n" +
- " dfsthroughput.file.size:tsize of each write/read (10GB)n" +
- " dfsthroughput.buffer.size:tbuffer size for write/read (4k)n");
- }
- public int run(String[] args) throws IOException {
- // silence the minidfs cluster
- Log hadoopLog = LogFactory.getLog("org");
- if (hadoopLog instanceof Log4JLogger) {
- ((Log4JLogger) hadoopLog).getLogger().setLevel(Level.WARN);
- }
- int reps = 1;
- if (args.length == 1) {
- try {
- reps = Integer.parseInt(args[0]);
- } catch (NumberFormatException e) {
- printUsage();
- return -1;
- }
- } else if (args.length > 1) {
- printUsage();
- return -1;
- }
- Configuration conf = getConf();
- // the size of the file to write
- long SIZE = conf.getLong("dfsthroughput.file.size",
- 10L * 1024 * 1024 * 1024);
- BUFFER_SIZE = conf.getInt("dfsthroughput.buffer.size", 4 * 1024);
- String localDir = conf.get("mapred.temp.dir");
- dir = new LocalDirAllocator("mapred.temp.dir");
- System.setProperty("test.build.data", localDir);
- System.out.println("Local = " + localDir);
- ChecksumFileSystem checkedLocal = FileSystem.getLocal(conf);
- FileSystem rawLocal = checkedLocal.getRawFileSystem();
- for(int i=0; i < reps; ++i) {
- writeAndReadLocalFile("local", conf, SIZE);
- writeAndReadFile(rawLocal, "raw", conf, SIZE);
- writeAndReadFile(checkedLocal, "checked", conf, SIZE);
- }
- MiniDFSCluster cluster = null;
- try {
- cluster = new MiniDFSCluster(conf, 1, true, new String[]{"/foo"});
- cluster.waitActive();
- FileSystem dfs = cluster.getFileSystem();
- for(int i=0; i < reps; ++i) {
- writeAndReadFile(dfs, "dfs", conf, SIZE);
- }
- } finally {
- if (cluster != null) {
- cluster.shutdown();
- // clean up minidfs junk
- rawLocal.delete(new Path(localDir, "dfs"), true);
- }
- }
- return 0;
- }
- /**
- * @param args
- */
- public static void main(String[] args) throws Exception {
- int res = ToolRunner.run(new Configuration(),
- new BenchmarkThroughput(), args);
- System.exit(res);
- }
- }