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TriggeredCheckpointTest.java
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TriggeredCheckpointTest.java
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/*
* The Alluxio Open Foundation licenses this work under the Apache License, version 2.0
* (the "License"). You may not use this work except in compliance with the License, which is
* available at www.apache.org/licenses/LICENSE-2.0
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
* either express or implied, as more fully set forth in the License.
*
* See the NOTICE file distributed with this work for information regarding copyright ownership.
*/
package alluxio.server.ft.journal;
import static org.junit.Assert.assertEquals;
import alluxio.AlluxioURI;
import alluxio.Constants;
import alluxio.client.file.FileSystem;
import alluxio.client.meta.MetaMasterClient;
import alluxio.conf.PropertyKey;
import alluxio.master.NoopMaster;
import alluxio.master.journal.JournalType;
import alluxio.master.journal.ufs.UfsJournal;
import alluxio.master.journal.ufs.UfsJournalSnapshot;
import alluxio.metrics.MasterMetrics;
import alluxio.multi.process.MultiProcessCluster;
import alluxio.multi.process.PortCoordination;
import alluxio.util.URIUtils;
import org.junit.Assert;
import org.junit.Test;
import java.net.URI;
import java.util.Collections;
public class TriggeredCheckpointTest {
@Test
public void ufsJournal() throws Exception {
int numFiles = 100;
MultiProcessCluster cluster = MultiProcessCluster
.newBuilder(PortCoordination.TRIGGERED_UFS_CHECKPOINT)
.setClusterName("TriggeredUfsCheckpointTest")
.addProperty(PropertyKey.MASTER_JOURNAL_TYPE, JournalType.UFS.toString())
.addProperty(PropertyKey.MASTER_JOURNAL_CHECKPOINT_PERIOD_ENTRIES, String.valueOf(numFiles))
.setNumMasters(1)
.setNumWorkers(1)
.build();
try {
cluster.start();
cluster.waitForAllNodesRegistered(20 * Constants.SECOND_MS);
// Get enough journal entries
createFiles(cluster, numFiles);
// Trigger checkpoint
Assert.assertEquals(cluster.getMasterAddresses().get(0).getHostname(),
cluster.getMetaMasterClient().checkpoint());
String journalLocation = cluster.getJournalDir();
UfsJournal ufsJournal = new UfsJournal(URIUtils.appendPathOrDie(new URI(journalLocation),
Constants.FILE_SYSTEM_MASTER_NAME), new NoopMaster(""), 0, Collections::emptySet);
Assert.assertEquals(1, UfsJournalSnapshot.getSnapshot(ufsJournal).getCheckpoints().size());
validateCheckpointInClusterRestart(cluster);
cluster.notifySuccess();
} finally {
cluster.destroy();
}
}
@Test
public void embeddedJournal() throws Exception {
MultiProcessCluster cluster = MultiProcessCluster
.newBuilder(PortCoordination.TRIGGERED_EMBEDDED_CHECKPOINT)
.setClusterName("TriggeredEmbeddedCheckpointTest")
.addProperty(PropertyKey.MASTER_JOURNAL_TYPE, JournalType.EMBEDDED.toString())
.addProperty(PropertyKey.MASTER_JOURNAL_LOG_SIZE_BYTES_MAX, String.valueOf(Constants.KB))
.setNumMasters(1)
.setNumWorkers(1)
.build();
cluster.start();
try {
cluster.waitForAllNodesRegistered(20 * Constants.SECOND_MS);
// Get enough journal entries
createFiles(cluster, 100);
// Trigger checkpoint and check if checkpoint exists
Assert.assertEquals(cluster.getMasterAddresses().get(0).getHostname(),
cluster.getMetaMasterClient().checkpoint());
validateCheckpointInClusterRestart(cluster);
cluster.notifySuccess();
} finally {
cluster.destroy();
}
}
/**
* Creates files in the cluster.
*
* @param cluster the cluster inside which to create files
* @param numFiles num of files to create
*/
private void createFiles(MultiProcessCluster cluster, int numFiles)
throws Exception {
FileSystem fs = cluster.getFileSystemClient();
for (int i = 0; i < numFiles; i++) {
fs.createFile(new AlluxioURI("/file" + i)).close();
}
MetaMasterClient meta = cluster.getMetaMasterClient();
assertEquals(numFiles + 1,
meta.getMetrics().get("Master." + MasterMetrics.TOTAL_PATHS).getLongValue());
}
/**
* Validates checkpoint by restarting the cluster.
*
* @param cluster the cluster to restart
*/
private void validateCheckpointInClusterRestart(MultiProcessCluster cluster)
throws Exception {
cluster.stopMasters();
cluster.startMasters();
cluster.waitForAllNodesRegistered(20 * Constants.SECOND_MS);
assertEquals(100, cluster.getFileSystemClient().listStatus(new AlluxioURI("/")).size());
assertEquals(101, cluster.getMetaMasterClient().getMetrics()
.get("Master." + MasterMetrics.TOTAL_PATHS).getLongValue());
}
}