| /** |
| * 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.ozone.container.common.volume; |
| |
| import org.apache.hadoop.fs.GetSpaceUsed; |
| import org.apache.hadoop.hdds.conf.OzoneConfiguration; |
| import org.apache.hadoop.hdfs.DFSConfigKeys; |
| import org.apache.hadoop.hdfs.MiniDFSCluster; |
| import org.apache.hadoop.util.DiskChecker.DiskOutOfSpaceException; |
| import org.apache.hadoop.util.ReflectionUtils; |
| import org.junit.After; |
| import org.junit.Assert; |
| import org.junit.Before; |
| import org.junit.Test; |
| import org.mockito.Mockito; |
| |
| import java.io.IOException; |
| import java.util.List; |
| import java.util.UUID; |
| |
| /** |
| * Tests {@link RoundRobinVolumeChoosingPolicy}. |
| */ |
| public class TestRoundRobinVolumeChoosingPolicy { |
| |
| private RoundRobinVolumeChoosingPolicy policy; |
| private List<HddsVolume> volumes; |
| private VolumeSet volumeSet; |
| |
| private final String baseDir = MiniDFSCluster.getBaseDirectory(); |
| private final String volume1 = baseDir + "disk1"; |
| private final String volume2 = baseDir + "disk2"; |
| |
| private static final String DUMMY_IP_ADDR = "0.0.0.0"; |
| |
| @Before |
| public void setup() throws Exception { |
| OzoneConfiguration conf = new OzoneConfiguration(); |
| String dataDirKey = volume1 + "," + volume2; |
| conf.set(DFSConfigKeys.DFS_DATANODE_DATA_DIR_KEY, dataDirKey); |
| policy = ReflectionUtils.newInstance( |
| RoundRobinVolumeChoosingPolicy.class, null); |
| volumeSet = new VolumeSet(UUID.randomUUID().toString(), conf); |
| volumes = volumeSet.getVolumesList(); |
| } |
| |
| @After |
| public void cleanUp() { |
| if (volumeSet != null) { |
| volumeSet.shutdown(); |
| volumeSet = null; |
| } |
| } |
| |
| @Test |
| public void testRRVolumeChoosingPolicy() throws Exception { |
| HddsVolume hddsVolume1 = volumes.get(0); |
| HddsVolume hddsVolume2 = volumes.get(1); |
| |
| // Set available space in volume1 to 100L |
| setAvailableSpace(hddsVolume1, 100L); |
| |
| // Set available space in volume1 to 200L |
| setAvailableSpace(hddsVolume2, 200L); |
| |
| Assert.assertEquals(100L, hddsVolume1.getAvailable()); |
| Assert.assertEquals(200L, hddsVolume2.getAvailable()); |
| |
| // Test two rounds of round-robin choosing |
| Assert.assertEquals(hddsVolume1, policy.chooseVolume(volumes, 0)); |
| Assert.assertEquals(hddsVolume2, policy.chooseVolume(volumes, 0)); |
| Assert.assertEquals(hddsVolume1, policy.chooseVolume(volumes, 0)); |
| Assert.assertEquals(hddsVolume2, policy.chooseVolume(volumes, 0)); |
| |
| // The first volume has only 100L space, so the policy should |
| // choose the second one in case we ask for more. |
| Assert.assertEquals(hddsVolume2, |
| policy.chooseVolume(volumes, 150)); |
| |
| // Fail if no volume has enough space available |
| try { |
| policy.chooseVolume(volumes, Long.MAX_VALUE); |
| Assert.fail(); |
| } catch (IOException e) { |
| // Passed. |
| } |
| } |
| |
| @Test |
| public void testRRPolicyExceptionMessage() throws Exception { |
| HddsVolume hddsVolume1 = volumes.get(0); |
| HddsVolume hddsVolume2 = volumes.get(1); |
| |
| // Set available space in volume1 to 100L |
| setAvailableSpace(hddsVolume1, 100L); |
| |
| // Set available space in volume1 to 200L |
| setAvailableSpace(hddsVolume2, 200L); |
| |
| int blockSize = 300; |
| try { |
| policy.chooseVolume(volumes, blockSize); |
| Assert.fail("expected to throw DiskOutOfSpaceException"); |
| } catch(DiskOutOfSpaceException e) { |
| Assert.assertEquals("Not returnig the expected message", |
| "Out of space: The volume with the most available space (=" + 200 |
| + " B) is less than the container size (=" + blockSize + " B).", |
| e.getMessage()); |
| } |
| } |
| |
| private void setAvailableSpace(HddsVolume hddsVolume, long availableSpace) |
| throws IOException { |
| GetSpaceUsed scmUsageMock = Mockito.mock(GetSpaceUsed.class); |
| hddsVolume.setScmUsageForTesting(scmUsageMock); |
| // Set used space to capacity -requiredAvailableSpace so that |
| // getAvailable() returns us the specified availableSpace. |
| Mockito.when(scmUsageMock.getUsed()).thenReturn( |
| (hddsVolume.getCapacity() - availableSpace)); |
| } |
| } |