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19 package org.apache.hadoop.hbase;
20
21 import java.io.IOException;
22 import java.nio.ByteBuffer;
23 import java.util.Random;
24
25 import org.apache.commons.logging.Log;
26 import org.apache.commons.logging.LogFactory;
27 import org.apache.commons.math.random.RandomData;
28 import org.apache.commons.math.random.RandomDataImpl;
29 import org.apache.hadoop.conf.Configuration;
30 import org.apache.hadoop.fs.FileSystem;
31 import org.apache.hadoop.fs.Path;
32 import org.apache.hadoop.hbase.io.ImmutableBytesWritable;
33 import org.apache.hadoop.hbase.io.compress.Compression;
34 import org.apache.hadoop.hbase.io.hfile.CacheConfig;
35 import org.apache.hadoop.hbase.io.hfile.HFile;
36 import org.apache.hadoop.hbase.io.hfile.HFileScanner;
37 import org.apache.hadoop.hbase.util.Bytes;
38
39
40
41
42
43
44 public class HFilePerformanceEvaluation {
45
46 private static final int ROW_LENGTH = 10;
47 private static final int ROW_COUNT = 1000000;
48 private static final int RFILE_BLOCKSIZE = 8 * 1024;
49
50 static final Log LOG =
51 LogFactory.getLog(HFilePerformanceEvaluation.class.getName());
52
53 static byte [] format(final int i) {
54 String v = Integer.toString(i);
55 return Bytes.toBytes("0000000000".substring(v.length()) + v);
56 }
57
58 static ImmutableBytesWritable format(final int i, ImmutableBytesWritable w) {
59 w.set(format(i));
60 return w;
61 }
62
63 private void runBenchmarks() throws Exception {
64 final Configuration conf = new Configuration();
65 final FileSystem fs = FileSystem.get(conf);
66 final Path mf = fs.makeQualified(new Path("performanceevaluation.mapfile"));
67 if (fs.exists(mf)) {
68 fs.delete(mf, true);
69 }
70
71 runBenchmark(new SequentialWriteBenchmark(conf, fs, mf, ROW_COUNT),
72 ROW_COUNT);
73 PerformanceEvaluationCommons.concurrentReads(new Runnable() {
74 public void run() {
75 try {
76 runBenchmark(new UniformRandomSmallScan(conf, fs, mf, ROW_COUNT),
77 ROW_COUNT);
78 } catch (Exception e) {
79 e.printStackTrace();
80 }
81 }
82 });
83 PerformanceEvaluationCommons.concurrentReads(new Runnable() {
84 public void run() {
85 try {
86 runBenchmark(new UniformRandomReadBenchmark(conf, fs, mf, ROW_COUNT),
87 ROW_COUNT);
88 } catch (Exception e) {
89 e.printStackTrace();
90 }
91 }
92 });
93 PerformanceEvaluationCommons.concurrentReads(new Runnable() {
94 public void run() {
95 try {
96 runBenchmark(new GaussianRandomReadBenchmark(conf, fs, mf, ROW_COUNT),
97 ROW_COUNT);
98 } catch (Exception e) {
99 e.printStackTrace();
100 }
101 }
102 });
103 PerformanceEvaluationCommons.concurrentReads(new Runnable() {
104 public void run() {
105 try {
106 runBenchmark(new SequentialReadBenchmark(conf, fs, mf, ROW_COUNT),
107 ROW_COUNT);
108 } catch (Exception e) {
109 e.printStackTrace();
110 }
111 }
112 });
113
114 }
115
116 protected void runBenchmark(RowOrientedBenchmark benchmark, int rowCount)
117 throws Exception {
118 LOG.info("Running " + benchmark.getClass().getSimpleName() + " for " +
119 rowCount + " rows.");
120 long elapsedTime = benchmark.run();
121 LOG.info("Running " + benchmark.getClass().getSimpleName() + " for " +
122 rowCount + " rows took " + elapsedTime + "ms.");
123 }
124
125 static abstract class RowOrientedBenchmark {
126
127 protected final Configuration conf;
128 protected final FileSystem fs;
129 protected final Path mf;
130 protected final int totalRows;
131
132 public RowOrientedBenchmark(Configuration conf, FileSystem fs, Path mf,
133 int totalRows) {
134 this.conf = conf;
135 this.fs = fs;
136 this.mf = mf;
137 this.totalRows = totalRows;
138 }
139
140 void setUp() throws Exception {
141
142 }
143
144 abstract void doRow(int i) throws Exception;
145
146 protected int getReportingPeriod() {
147 return this.totalRows / 10;
148 }
149
150 void tearDown() throws Exception {
151
152 }
153
154
155
156
157
158
159 long run() throws Exception {
160 long elapsedTime;
161 setUp();
162 long startTime = System.currentTimeMillis();
163 try {
164 for (int i = 0; i < totalRows; i++) {
165 if (i > 0 && i % getReportingPeriod() == 0) {
166 LOG.info("Processed " + i + " rows.");
167 }
168 doRow(i);
169 }
170 elapsedTime = System.currentTimeMillis() - startTime;
171 } finally {
172 tearDown();
173 }
174 return elapsedTime;
175 }
176
177 }
178
179 static class SequentialWriteBenchmark extends RowOrientedBenchmark {
180 protected HFile.Writer writer;
181 private Random random = new Random();
182 private byte[] bytes = new byte[ROW_LENGTH];
183
184 public SequentialWriteBenchmark(Configuration conf, FileSystem fs, Path mf,
185 int totalRows) {
186 super(conf, fs, mf, totalRows);
187 }
188
189 @Override
190 void setUp() throws Exception {
191 writer =
192 HFile.getWriterFactoryNoCache(conf)
193 .withPath(fs, mf)
194 .withBlockSize(RFILE_BLOCKSIZE)
195 .create();
196 }
197
198 @Override
199 void doRow(int i) throws Exception {
200 writer.append(format(i), generateValue());
201 }
202
203 private byte[] generateValue() {
204 random.nextBytes(bytes);
205 return bytes;
206 }
207
208 @Override
209 protected int getReportingPeriod() {
210 return this.totalRows;
211 }
212
213 @Override
214 void tearDown() throws Exception {
215 writer.close();
216 }
217
218 }
219
220 static abstract class ReadBenchmark extends RowOrientedBenchmark {
221
222 protected HFile.Reader reader;
223
224 public ReadBenchmark(Configuration conf, FileSystem fs, Path mf,
225 int totalRows) {
226 super(conf, fs, mf, totalRows);
227 }
228
229 @Override
230 void setUp() throws Exception {
231 reader = HFile.createReader(this.fs, this.mf, new CacheConfig(this.conf));
232 this.reader.loadFileInfo();
233 }
234
235 @Override
236 void tearDown() throws Exception {
237 reader.close();
238 }
239
240 }
241
242 static class SequentialReadBenchmark extends ReadBenchmark {
243 private HFileScanner scanner;
244
245 public SequentialReadBenchmark(Configuration conf, FileSystem fs,
246 Path mf, int totalRows) {
247 super(conf, fs, mf, totalRows);
248 }
249
250 @Override
251 void setUp() throws Exception {
252 super.setUp();
253 this.scanner = this.reader.getScanner(false, false);
254 this.scanner.seekTo();
255 }
256
257 @Override
258 void doRow(int i) throws Exception {
259 if (this.scanner.next()) {
260 ByteBuffer k = this.scanner.getKey();
261 PerformanceEvaluationCommons.assertKey(format(i + 1), k);
262 ByteBuffer v = scanner.getValue();
263 PerformanceEvaluationCommons.assertValueSize(v.limit(), ROW_LENGTH);
264 }
265 }
266
267 @Override
268 protected int getReportingPeriod() {
269 return this.totalRows;
270 }
271
272 }
273
274 static class UniformRandomReadBenchmark extends ReadBenchmark {
275
276 private Random random = new Random();
277
278 public UniformRandomReadBenchmark(Configuration conf, FileSystem fs,
279 Path mf, int totalRows) {
280 super(conf, fs, mf, totalRows);
281 }
282
283 @Override
284 void doRow(int i) throws Exception {
285 HFileScanner scanner = this.reader.getScanner(false, true);
286 byte [] b = getRandomRow();
287 scanner.seekTo(b);
288 ByteBuffer k = scanner.getKey();
289 PerformanceEvaluationCommons.assertKey(b, k);
290 ByteBuffer v = scanner.getValue();
291 PerformanceEvaluationCommons.assertValueSize(v.limit(), ROW_LENGTH);
292 }
293
294 private byte [] getRandomRow() {
295 return format(random.nextInt(totalRows));
296 }
297 }
298
299 static class UniformRandomSmallScan extends ReadBenchmark {
300 private Random random = new Random();
301
302 public UniformRandomSmallScan(Configuration conf, FileSystem fs,
303 Path mf, int totalRows) {
304 super(conf, fs, mf, totalRows/10);
305 }
306
307 @Override
308 void doRow(int i) throws Exception {
309 HFileScanner scanner = this.reader.getScanner(false, false);
310 byte [] b = getRandomRow();
311 if (scanner.seekTo(b) != 0) {
312 System.out.println("Nonexistent row: " + new String(b));
313 return;
314 }
315 ByteBuffer k = scanner.getKey();
316 PerformanceEvaluationCommons.assertKey(b, k);
317
318 for (int ii = 0; ii < 30; ii++) {
319 if (!scanner.next()) {
320 System.out.println("NOTHING FOLLOWS");
321 }
322 ByteBuffer v = scanner.getValue();
323 PerformanceEvaluationCommons.assertValueSize(v.limit(), ROW_LENGTH);
324 }
325 }
326
327 private byte [] getRandomRow() {
328 return format(random.nextInt(totalRows));
329 }
330 }
331
332 static class GaussianRandomReadBenchmark extends ReadBenchmark {
333
334 private RandomData randomData = new RandomDataImpl();
335
336 public GaussianRandomReadBenchmark(Configuration conf, FileSystem fs,
337 Path mf, int totalRows) {
338 super(conf, fs, mf, totalRows);
339 }
340
341 @Override
342 void doRow(int i) throws Exception {
343 HFileScanner scanner = this.reader.getScanner(false, true);
344 scanner.seekTo(getGaussianRandomRowBytes());
345 for (int ii = 0; ii < 30; ii++) {
346 if (!scanner.next()) {
347 System.out.println("NOTHING FOLLOWS");
348 }
349 scanner.getKey();
350 scanner.getValue();
351 }
352 }
353
354 private byte [] getGaussianRandomRowBytes() {
355 int r = (int) randomData.nextGaussian((double)totalRows / 2.0,
356 (double)totalRows / 10.0);
357 return format(r);
358 }
359 }
360
361
362
363
364
365
366 public static void main(String[] args) throws Exception {
367 new HFilePerformanceEvaluation().runBenchmarks();
368 }
369 }