| /** |
| * 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.FileContext; |
| 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.junit.After; |
| import org.junit.Before; |
| import org.junit.Test; |
| |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import static org.junit.Assert.assertTrue; |
| |
| /** |
| * Testing correctness of FileSystem.getFileBlockLocations and |
| * FileSystem.listFiles for erasure coded files. |
| */ |
| public class TestDistributedFileSystemWithECFile { |
| private final ErasureCodingPolicy ecPolicy = |
| StripedFileTestUtil.getDefaultECPolicy(); |
| private final int cellSize = ecPolicy.getCellSize(); |
| private final short dataBlocks = (short) ecPolicy.getNumDataUnits(); |
| private final short parityBlocks = (short) ecPolicy.getNumParityUnits(); |
| private final int numDNs = dataBlocks + parityBlocks; |
| private final int stripesPerBlock = 4; |
| private final int blockSize = stripesPerBlock * cellSize; |
| private final int blockGroupSize = blockSize * dataBlocks; |
| |
| private MiniDFSCluster cluster; |
| private FileContext fileContext; |
| private DistributedFileSystem fs; |
| private Configuration conf = new HdfsConfiguration(); |
| |
| @Before |
| public void setup() throws IOException { |
| 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( |
| StripedFileTestUtil.getDefaultECPolicy().getName()); |
| fs.mkdirs(new Path("/ec")); |
| cluster.getFileSystem().getClient().setErasureCodingPolicy("/ec", |
| StripedFileTestUtil.getDefaultECPolicy().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 = 3; |
| 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); |
| } |
| } |