/**
* 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.activemq.store.kahadb.disk.journal;
import org.apache.activemq.management.TimeStatisticImpl;
import org.apache.activemq.store.kahadb.KahaDBStore;
import org.apache.activemq.util.ByteSequence;
import org.apache.activemq.util.Wait;
import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.File;
import java.util.Random;
import static org.junit.Assert.assertTrue;
public class PreallocationJournalLatencyTest {
private static final Logger LOG = LoggerFactory.getLogger(PreallocationJournalLatencyTest.class);
final Random rand = new Random();
@Test
public void preallocationLatency() throws Exception {
TimeStatisticImpl sparse = executeTest(Journal.PreallocationStrategy.SPARSE_FILE.name());
TimeStatisticImpl chunked_zeros = executeTest(Journal.PreallocationStrategy.CHUNKED_ZEROS.name());
//TimeStatisticImpl zeros = executeTest(Journal.PreallocationStrategy.ZEROS.name());
TimeStatisticImpl kernel = executeTest(Journal.PreallocationStrategy.OS_KERNEL_COPY.name());
LOG.info(" sparse: " + sparse);
LOG.info(" chunked: " + chunked_zeros);
//LOG.info(" zeros: " + zeros);
LOG.info(" kernel: " + kernel);
}
private TimeStatisticImpl executeTest(String preallocationStrategy)throws Exception {
int randInt = rand.nextInt(100);
File dataDirectory = new File("./target/activemq-data/kahadb" + randInt);
final KahaDBStore store = new KahaDBStore();
store.setCheckpointInterval(5000);
store.setJournalMaxFileLength(32*1204*1024);
store.deleteAllMessages();
store.setDirectory(dataDirectory);
store.setPreallocationStrategy(preallocationStrategy);
store.setPreallocationScope(Journal.PreallocationScope.ENTIRE_JOURNAL_ASYNC.name());
store.start();
final File journalLog = new File(dataDirectory, "db-1.log");
assertTrue("file exists", Wait.waitFor(new Wait.Condition() {
@Override
public boolean isSatisified() throws Exception {
return journalLog.exists();
}
}));
final Journal journal = store.getJournal();
ByteSequence byteSequence = new ByteSequence(new byte[16*1024]);
TimeStatisticImpl timeStatistic = new TimeStatisticImpl("append", "duration");
for (int i=0;i<5000; i++) {
final long start = System.currentTimeMillis();
journal.write(byteSequence, true);
timeStatistic.addTime(System.currentTimeMillis() - start);
}
LOG.info("current journal dataFile id: " + journal.getCurrentDataFileId());
store.stop();
return timeStatistic;
}
}