| /** |
| * 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; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.BlockLocation; |
| import org.apache.hadoop.fs.FSDataOutputStream; |
| import org.apache.hadoop.fs.FileContext; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.LocatedFileStatus; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.fs.RemoteIterator; |
| import org.apache.hadoop.hdfs.protocol.ErasureCodingPolicy; |
| import org.apache.hadoop.hdfs.protocol.SystemErasureCodingPolicies; |
| import org.apache.hadoop.io.IOUtils; |
| import org.junit.After; |
| import org.junit.Before; |
| import org.junit.Rule; |
| import org.junit.Test; |
| import org.junit.rules.Timeout; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertNull; |
| import static org.junit.Assert.assertTrue; |
| |
| /** |
| * Testing correctness of FileSystem.getFileBlockLocations and |
| * FileSystem.listFiles for erasure coded files. |
| */ |
| public class TestDistributedFileSystemWithECFile { |
| private ErasureCodingPolicy ecPolicy; |
| private int cellSize; |
| private short dataBlocks; |
| private short parityBlocks; |
| private int numDNs; |
| private int stripesPerBlock; |
| private int blockSize; |
| private int blockGroupSize; |
| |
| private MiniDFSCluster cluster; |
| private FileContext fileContext; |
| private DistributedFileSystem fs; |
| private Configuration conf = new HdfsConfiguration(); |
| |
| public ErasureCodingPolicy getEcPolicy() { |
| return StripedFileTestUtil.getDefaultECPolicy(); |
| } |
| |
| @Rule |
| public final Timeout globalTimeout = new Timeout(60000 * 3); |
| |
| @Before |
| public void setup() throws IOException { |
| ecPolicy = getEcPolicy(); |
| cellSize = ecPolicy.getCellSize(); |
| dataBlocks = (short) ecPolicy.getNumDataUnits(); |
| parityBlocks = (short) ecPolicy.getNumParityUnits(); |
| numDNs = dataBlocks + parityBlocks; |
| stripesPerBlock = 4; |
| blockSize = stripesPerBlock * cellSize; |
| blockGroupSize = blockSize * dataBlocks; |
| |
| conf.setLong(DFSConfigKeys.DFS_BLOCK_SIZE_KEY, blockSize); |
| conf.setBoolean(DFSConfigKeys.DFS_NAMENODE_REDUNDANCY_CONSIDERLOAD_KEY, |
| false); |
| cluster = new MiniDFSCluster.Builder(conf).numDataNodes(numDNs).build(); |
| fileContext = FileContext.getFileContext(cluster.getURI(0), conf); |
| fs = cluster.getFileSystem(); |
| fs.enableErasureCodingPolicy(ecPolicy.getName()); |
| fs.mkdirs(new Path("/ec")); |
| cluster.getFileSystem().getClient().setErasureCodingPolicy("/ec", |
| ecPolicy.getName()); |
| } |
| |
| @After |
| public void tearDown() throws IOException { |
| if (cluster != null) { |
| cluster.shutdown(); |
| cluster = null; |
| } |
| } |
| |
| private void createFile(String path, int size) throws Exception { |
| byte[] expected = StripedFileTestUtil.generateBytes(size); |
| Path src = new Path(path); |
| DFSTestUtil.writeFile(fs, src, new String(expected)); |
| StripedFileTestUtil.waitBlockGroupsReported(fs, src.toString()); |
| StripedFileTestUtil.verifyLength(fs, src, size); |
| } |
| |
| @Test(timeout=60000) |
| public void testListECFilesSmallerThanOneCell() throws Exception { |
| createFile("/ec/smallcell", 1); |
| final List<LocatedFileStatus> retVal = new ArrayList<>(); |
| final RemoteIterator<LocatedFileStatus> iter = |
| cluster.getFileSystem().listFiles(new Path("/ec"), true); |
| while (iter.hasNext()) { |
| retVal.add(iter.next()); |
| } |
| assertTrue(retVal.size() == 1); |
| LocatedFileStatus fileStatus = retVal.get(0); |
| assertSmallerThanOneCell(fileStatus.getBlockLocations()); |
| |
| BlockLocation[] locations = cluster.getFileSystem().getFileBlockLocations( |
| fileStatus, 0, fileStatus.getLen()); |
| assertSmallerThanOneCell(locations); |
| |
| //Test FileContext |
| fileStatus = fileContext.listLocatedStatus(new Path("/ec")).next(); |
| assertSmallerThanOneCell(fileStatus.getBlockLocations()); |
| locations = fileContext.getFileBlockLocations(new Path("/ec/smallcell"), |
| 0, fileStatus.getLen()); |
| assertSmallerThanOneCell(locations); |
| } |
| |
| private void assertSmallerThanOneCell(BlockLocation[] locations) |
| throws IOException { |
| assertTrue(locations.length == 1); |
| BlockLocation blockLocation = locations[0]; |
| assertTrue(blockLocation.getOffset() == 0); |
| assertTrue(blockLocation.getLength() == 1); |
| assertTrue(blockLocation.getHosts().length == 1 + parityBlocks); |
| } |
| |
| @Test(timeout=60000) |
| public void testListECFilesSmallerThanOneStripe() throws Exception { |
| int dataBlocksNum = dataBlocks; |
| createFile("/ec/smallstripe", cellSize * dataBlocksNum); |
| RemoteIterator<LocatedFileStatus> iter = |
| cluster.getFileSystem().listFiles(new Path("/ec"), true); |
| LocatedFileStatus fileStatus = iter.next(); |
| assertSmallerThanOneStripe(fileStatus.getBlockLocations(), dataBlocksNum); |
| |
| BlockLocation[] locations = cluster.getFileSystem().getFileBlockLocations( |
| fileStatus, 0, fileStatus.getLen()); |
| assertSmallerThanOneStripe(locations, dataBlocksNum); |
| |
| //Test FileContext |
| fileStatus = fileContext.listLocatedStatus(new Path("/ec")).next(); |
| assertSmallerThanOneStripe(fileStatus.getBlockLocations(), dataBlocksNum); |
| locations = fileContext.getFileBlockLocations(new Path("/ec/smallstripe"), |
| 0, fileStatus.getLen()); |
| assertSmallerThanOneStripe(locations, dataBlocksNum); |
| } |
| |
| private void assertSmallerThanOneStripe(BlockLocation[] locations, |
| int dataBlocksNum) throws IOException { |
| int expectedHostNum = dataBlocksNum + parityBlocks; |
| assertTrue(locations.length == 1); |
| BlockLocation blockLocation = locations[0]; |
| assertTrue(blockLocation.getHosts().length == expectedHostNum); |
| assertTrue(blockLocation.getOffset() == 0); |
| assertTrue(blockLocation.getLength() == dataBlocksNum * cellSize); |
| } |
| |
| @Test(timeout=60000) |
| public void testListECFilesMoreThanOneBlockGroup() throws Exception { |
| createFile("/ec/group", blockGroupSize + 123); |
| RemoteIterator<LocatedFileStatus> iter = |
| cluster.getFileSystem().listFiles(new Path("/ec"), true); |
| LocatedFileStatus fileStatus = iter.next(); |
| assertMoreThanOneBlockGroup(fileStatus.getBlockLocations(), 123); |
| |
| BlockLocation[] locations = cluster.getFileSystem().getFileBlockLocations( |
| fileStatus, 0, fileStatus.getLen()); |
| assertMoreThanOneBlockGroup(locations, 123); |
| |
| //Test FileContext |
| iter = fileContext.listLocatedStatus(new Path("/ec")); |
| fileStatus = iter.next(); |
| assertMoreThanOneBlockGroup(fileStatus.getBlockLocations(), 123); |
| locations = fileContext.getFileBlockLocations(new Path("/ec/group"), |
| 0, fileStatus.getLen()); |
| assertMoreThanOneBlockGroup(locations, 123); |
| } |
| |
| private void assertMoreThanOneBlockGroup(BlockLocation[] locations, |
| int lastBlockSize) throws IOException { |
| assertTrue(locations.length == 2); |
| BlockLocation fistBlockGroup = locations[0]; |
| assertTrue(fistBlockGroup.getHosts().length == numDNs); |
| assertTrue(fistBlockGroup.getOffset() == 0); |
| assertTrue(fistBlockGroup.getLength() == blockGroupSize); |
| BlockLocation lastBlock = locations[1]; |
| assertTrue(lastBlock.getHosts().length == 1 + parityBlocks); |
| assertTrue(lastBlock.getOffset() == blockGroupSize); |
| assertTrue(lastBlock.getLength() == lastBlockSize); |
| } |
| |
| @Test(timeout=60000) |
| public void testReplayEditLogsForReplicatedFile() throws Exception { |
| cluster.shutdown(); |
| |
| ErasureCodingPolicy rs63 = SystemErasureCodingPolicies.getByID( |
| SystemErasureCodingPolicies.RS_6_3_POLICY_ID |
| ); |
| ErasureCodingPolicy rs32 = SystemErasureCodingPolicies.getByID( |
| SystemErasureCodingPolicies.RS_3_2_POLICY_ID |
| ); |
| // Test RS(6,3) as default policy |
| int numDataNodes = rs63.getNumDataUnits() + rs63.getNumParityUnits(); |
| cluster = new MiniDFSCluster.Builder(conf) |
| .nnTopology(MiniDFSNNTopology.simpleHATopology()) |
| .numDataNodes(numDataNodes) |
| .build(); |
| |
| cluster.transitionToActive(0); |
| fs = cluster.getFileSystem(0); |
| fs.enableErasureCodingPolicy(rs63.getName()); |
| fs.enableErasureCodingPolicy(rs32.getName()); |
| |
| Path dir = new Path("/ec"); |
| fs.mkdirs(dir); |
| fs.setErasureCodingPolicy(dir, rs63.getName()); |
| |
| // Create an erasure coded file with the default policy. |
| Path ecFile = new Path(dir, "ecFile"); |
| createFile(ecFile.toString(), 10); |
| // Create a replicated file. |
| Path replicatedFile = new Path(dir, "replicated"); |
| try (FSDataOutputStream out = fs.createFile(replicatedFile) |
| .replicate().build()) { |
| out.write(123); |
| } |
| // Create an EC file with a different policy. |
| Path ecFile2 = new Path(dir, "RS-3-2"); |
| try (FSDataOutputStream out = fs.createFile(ecFile2) |
| .ecPolicyName(rs32.getName()).build()) { |
| out.write(456); |
| } |
| |
| cluster.transitionToStandby(0); |
| cluster.transitionToActive(1); |
| |
| fs = cluster.getFileSystem(1); |
| assertNull(fs.getErasureCodingPolicy(replicatedFile)); |
| assertEquals(rs63, fs.getErasureCodingPolicy(ecFile)); |
| assertEquals(rs32, fs.getErasureCodingPolicy(ecFile2)); |
| } |
| |
| @SuppressWarnings("deprecation") |
| @Test |
| public void testStatistics() throws Exception { |
| final String fileName = "/ec/file"; |
| final int size = 3200; |
| createFile(fileName, size); |
| InputStream in = null; |
| try { |
| in = fs.open(new Path(fileName)); |
| IOUtils.copyBytes(in, System.out, 4096, false); |
| } finally { |
| IOUtils.closeStream(in); |
| } |
| |
| // verify stats are correct |
| Long totalBytesRead = 0L; |
| Long ecBytesRead = 0L; |
| for (FileSystem.Statistics stat : FileSystem.getAllStatistics()) { |
| totalBytesRead += stat.getBytesRead(); |
| ecBytesRead += stat.getBytesReadErasureCoded(); |
| } |
| assertEquals(Long.valueOf(size), totalBytesRead); |
| assertEquals(Long.valueOf(size), ecBytesRead); |
| |
| // verify thread local stats are correct |
| Long totalBytesReadThread = 0L; |
| Long ecBytesReadThread = 0L; |
| for (FileSystem.Statistics stat : FileSystem.getAllStatistics()) { |
| FileSystem.Statistics.StatisticsData data = stat.getThreadStatistics(); |
| totalBytesReadThread += data.getBytesRead(); |
| ecBytesReadThread += data.getBytesReadErasureCoded(); |
| } |
| assertEquals(Long.valueOf(size), totalBytesReadThread); |
| assertEquals(Long.valueOf(size), ecBytesReadThread); |
| } |
| } |