/**
* 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.hbase;
import static org.junit.Assert.*;
import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import org.apache.hadoop.fs.FSDataInputStream;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hbase.PerformanceEvaluation.RandomReadTest;
import org.apache.hadoop.hbase.PerformanceEvaluation.TestOptions;
import org.apache.hadoop.hbase.testclassification.MiscTests;
import org.apache.hadoop.hbase.testclassification.SmallTests;
import org.codehaus.jackson.JsonGenerationException;
import org.codehaus.jackson.map.JsonMappingException;
import org.codehaus.jackson.map.ObjectMapper;
import org.junit.Ignore;
import org.junit.Test;
import org.junit.experimental.categories.Category;
import com.yammer.metrics.core.Histogram;
import com.yammer.metrics.stats.Snapshot;
import com.yammer.metrics.stats.UniformSample;
@Category({MiscTests.class, SmallTests.class})
public class TestPerformanceEvaluation {
private static final HBaseTestingUtility HTU = new HBaseTestingUtility();
@Test
public void testSerialization()
throws JsonGenerationException, JsonMappingException, IOException {
PerformanceEvaluation.TestOptions options = new PerformanceEvaluation.TestOptions();
assertTrue(!options.isAutoFlush());
options.setAutoFlush(true);
ObjectMapper mapper = new ObjectMapper();
String optionsString = mapper.writeValueAsString(options);
PerformanceEvaluation.TestOptions optionsDeserialized =
mapper.readValue(optionsString, PerformanceEvaluation.TestOptions.class);
assertTrue(optionsDeserialized.isAutoFlush());
}
/**
* Exercise the mr spec writing. Simple assertions to make sure it is basically working.
* @throws IOException
*/
@Ignore @Test
public void testWriteInputFile() throws IOException {
TestOptions opts = new PerformanceEvaluation.TestOptions();
final int clients = 10;
opts.setNumClientThreads(clients);
opts.setPerClientRunRows(10);
Path dir =
PerformanceEvaluation.writeInputFile(HTU.getConfiguration(), opts, HTU.getDataTestDir());
FileSystem fs = FileSystem.get(HTU.getConfiguration());
Path p = new Path(dir, PerformanceEvaluation.JOB_INPUT_FILENAME);
long len = fs.getFileStatus(p).getLen();
assertTrue(len > 0);
byte [] content = new byte[(int)len];
FSDataInputStream dis = fs.open(p);
try {
dis.readFully(content);
BufferedReader br =
new BufferedReader(new InputStreamReader(new ByteArrayInputStream(content)));
int count = 0;
while (br.readLine() != null) {
count++;
}
assertEquals(clients * PerformanceEvaluation.TASKS_PER_CLIENT, count);
} finally {
dis.close();
}
}
@Test
public void testSizeCalculation() {
TestOptions opts = new PerformanceEvaluation.TestOptions();
opts = PerformanceEvaluation.calculateRowsAndSize(opts);
int rows = opts.getPerClientRunRows();
// Default row count
final int defaultPerClientRunRows = 1024 * 1024;
assertEquals(defaultPerClientRunRows, rows);
// If size is 2G, then twice the row count.
opts.setSize(2.0f);
opts = PerformanceEvaluation.calculateRowsAndSize(opts);
assertEquals(defaultPerClientRunRows * 2, opts.getPerClientRunRows());
// If two clients, then they get half the rows each.
opts.setNumClientThreads(2);
opts = PerformanceEvaluation.calculateRowsAndSize(opts);
assertEquals(defaultPerClientRunRows, opts.getPerClientRunRows());
// What if valueSize is 'random'? Then half of the valueSize so twice the rows.
opts.valueRandom = true;
opts = PerformanceEvaluation.calculateRowsAndSize(opts);
assertEquals(defaultPerClientRunRows * 2, opts.getPerClientRunRows());
}
@Test
public void testZipfian()
throws NoSuchMethodException, SecurityException, InstantiationException, IllegalAccessException,
IllegalArgumentException, InvocationTargetException {
TestOptions opts = new PerformanceEvaluation.TestOptions();
opts.setValueZipf(true);
final int valueSize = 1024;
opts.setValueSize(valueSize);
RandomReadTest rrt = new RandomReadTest(null, opts, null);
Constructor<?> ctor =
Histogram.class.getDeclaredConstructor(com.yammer.metrics.stats.Sample.class);
ctor.setAccessible(true);
Histogram histogram = (Histogram)ctor.newInstance(new UniformSample(1024 * 500));
for (int i = 0; i < 100; i++) {
histogram.update(rrt.getValueLength(null));
}
double stddev = histogram.stdDev();
assertTrue(stddev != 0 && stddev != 1.0);
assertTrue(histogram.stdDev() != 0);
Snapshot snapshot = histogram.getSnapshot();
double median = snapshot.getMedian();
assertTrue(median != 0 && median != 1 && median != valueSize);
}
}