/**
* 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.server.datanode.fsdataset.impl;
import com.google.common.base.Supplier;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystemTestHelper;
import org.apache.hadoop.fs.StorageType;
import org.apache.hadoop.hdfs.DFSConfigKeys;
import org.apache.hadoop.hdfs.server.datanode.BlockScanner;
import org.apache.hadoop.hdfs.server.datanode.fsdataset.FsVolumeReference;
import org.apache.hadoop.hdfs.server.datanode.fsdataset.RoundRobinVolumeChoosingPolicy;
import org.apache.hadoop.hdfs.server.datanode.fsdataset.VolumeChoosingPolicy;
import org.apache.hadoop.test.GenericTestUtils;
import org.apache.hadoop.util.StringUtils;
import org.junit.Before;
import org.junit.Test;
import org.mockito.Mockito;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import static org.junit.Assert.assertEquals;
import java.util.concurrent.TimeoutException;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotEquals;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.fail;
import static org.mockito.Mockito.mock;
public class TestFsVolumeList {
private final Configuration conf = new Configuration();
private VolumeChoosingPolicy<FsVolumeImpl> blockChooser =
new RoundRobinVolumeChoosingPolicy<>();
private FsDatasetImpl dataset = null;
private String baseDir;
private BlockScanner blockScanner;
@Before
public void setUp() {
dataset = mock(FsDatasetImpl.class);
baseDir = new FileSystemTestHelper().getTestRootDir();
Configuration blockScannerConf = new Configuration();
blockScannerConf.setInt(DFSConfigKeys.
DFS_DATANODE_SCAN_PERIOD_HOURS_KEY, -1);
blockScanner = new BlockScanner(null, blockScannerConf);
}
@Test(timeout=30000)
public void testGetNextVolumeWithClosedVolume() throws IOException {
FsVolumeList volumeList = new FsVolumeList(
Collections.<VolumeFailureInfo>emptyList(), blockScanner, blockChooser);
final List<FsVolumeImpl> volumes = new ArrayList<>();
for (int i = 0; i < 3; i++) {
File curDir = new File(baseDir, "nextvolume-" + i);
curDir.mkdirs();
FsVolumeImpl volume = new FsVolumeImpl(dataset, "storage-id", curDir,
conf, StorageType.DEFAULT);
volume.setCapacityForTesting(1024 * 1024 * 1024);
volumes.add(volume);
volumeList.addVolume(volume.obtainReference());
}
// Close the second volume.
volumes.get(1).setClosed();
try {
GenericTestUtils.waitFor(new Supplier<Boolean>() {
@Override
public Boolean get() {
return volumes.get(1).checkClosed();
}
}, 100, 3000);
} catch (TimeoutException e) {
fail("timed out while waiting for volume to be removed.");
} catch (InterruptedException ie) {
Thread.currentThread().interrupt();
}
for (int i = 0; i < 10; i++) {
try (FsVolumeReference ref =
volumeList.getNextVolume(StorageType.DEFAULT, 128)) {
// volume No.2 will not be chosen.
assertNotEquals(ref.getVolume(), volumes.get(1));
}
}
}
@Test(timeout=30000)
public void testReleaseVolumeRefIfNoBlockScanner() throws IOException {
FsVolumeList volumeList = new FsVolumeList(
Collections.<VolumeFailureInfo>emptyList(), null, blockChooser);
File volDir = new File(baseDir, "volume-0");
volDir.mkdirs();
FsVolumeImpl volume = new FsVolumeImpl(dataset, "storage-id", volDir,
conf, StorageType.DEFAULT);
FsVolumeReference ref = volume.obtainReference();
volumeList.addVolume(ref);
assertNull(ref.getVolume());
}
@Test
public void testDfsReservedForDifferentStorageTypes() throws IOException {
Configuration conf = new Configuration();
conf.setLong(DFSConfigKeys.DFS_DATANODE_DU_RESERVED_KEY, 100L);
File volDir = new File(baseDir, "volume-0");
volDir.mkdirs();
// when storage type reserved is not configured,should consider
// dfs.datanode.du.reserved.
FsVolumeImpl volume = new FsVolumeImpl(dataset, "storage-id", volDir, conf,
StorageType.RAM_DISK);
assertEquals("", 100L, volume.getReserved());
// when storage type reserved is configured.
conf.setLong(
DFSConfigKeys.DFS_DATANODE_DU_RESERVED_KEY + "."
+ StringUtils.toLowerCase(StorageType.RAM_DISK.toString()), 1L);
conf.setLong(
DFSConfigKeys.DFS_DATANODE_DU_RESERVED_KEY + "."
+ StringUtils.toLowerCase(StorageType.SSD.toString()), 2L);
FsVolumeImpl volume1 = new FsVolumeImpl(dataset, "storage-id", volDir,
conf, StorageType.RAM_DISK);
assertEquals("", 1L, volume1.getReserved());
FsVolumeImpl volume2 = new FsVolumeImpl(dataset, "storage-id", volDir,
conf, StorageType.SSD);
assertEquals("", 2L, volume2.getReserved());
FsVolumeImpl volume3 = new FsVolumeImpl(dataset, "storage-id", volDir,
conf, StorageType.DISK);
assertEquals("", 100L, volume3.getReserved());
FsVolumeImpl volume4 = new FsVolumeImpl(dataset, "storage-id", volDir,
conf, StorageType.DEFAULT);
assertEquals("", 100L, volume4.getReserved());
}
@Test
public void testNonDfsUsedMetricForVolume() throws Exception {
File volDir = new File(baseDir, "volume-0");
volDir.mkdirs();
/*
* Lets have the example.
* Capacity - 1000
* Reserved - 100
* DfsUsed - 200
* Actual Non-DfsUsed - 300 -->(expected)
* ReservedForReplicas - 50
*/
long diskCapacity = 1000L;
long duReserved = 100L;
long dfsUsage = 200L;
long actualNonDfsUsage = 300L;
long reservedForReplicas = 50L;
conf.setLong(DFSConfigKeys.DFS_DATANODE_DU_RESERVED_KEY, duReserved);
FsVolumeImpl volume = new FsVolumeImpl(dataset, "storage-id", volDir, conf,
StorageType.DEFAULT);
FsVolumeImpl spyVolume = Mockito.spy(volume);
// Set Capacity for testing
long testCapacity = diskCapacity - duReserved;
spyVolume.setCapacityForTesting(testCapacity);
// Mock volume.getDfAvailable()
long dfAvailable = diskCapacity - dfsUsage - actualNonDfsUsage;
Mockito.doReturn(dfAvailable).when(spyVolume).getDfAvailable();
// Mock dfsUsage
Mockito.doReturn(dfsUsage).when(spyVolume).getDfsUsed();
// Mock reservedForReplcas
Mockito.doReturn(reservedForReplicas).when(spyVolume).getReservedForRbw();
Mockito.doReturn(actualNonDfsUsage).when(spyVolume).getActualNonDfsUsed();
long expectedNonDfsUsage = actualNonDfsUsage - duReserved;
assertEquals(expectedNonDfsUsage, spyVolume.getNonDfsUsed());
}
}