[120] | 1 | /** |
---|
| 2 | * Licensed to the Apache Software Foundation (ASF) under one |
---|
| 3 | * or more contributor license agreements. See the NOTICE file |
---|
| 4 | * distributed with this work for additional information |
---|
| 5 | * regarding copyright ownership. The ASF licenses this file |
---|
| 6 | * to you under the Apache License, Version 2.0 (the |
---|
| 7 | * "License"); you may not use this file except in compliance |
---|
| 8 | * with the License. You may obtain a copy of the License at |
---|
| 9 | * |
---|
| 10 | * http://www.apache.org/licenses/LICENSE-2.0 |
---|
| 11 | * |
---|
| 12 | * Unless required by applicable law or agreed to in writing, software |
---|
| 13 | * distributed under the License is distributed on an "AS IS" BASIS, |
---|
| 14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
---|
| 15 | * See the License for the specific language governing permissions and |
---|
| 16 | * limitations under the License. |
---|
| 17 | */ |
---|
| 18 | package org.apache.hadoop.hdfs.server.datanode; |
---|
| 19 | |
---|
| 20 | import java.io.DataInputStream; |
---|
| 21 | import java.io.IOException; |
---|
| 22 | import java.io.InputStream; |
---|
| 23 | import java.io.OutputStream; |
---|
| 24 | import junit.framework.TestCase; |
---|
| 25 | |
---|
| 26 | import org.apache.hadoop.conf.Configuration; |
---|
| 27 | import org.apache.hadoop.hdfs.protocol.Block; |
---|
| 28 | import org.apache.hadoop.hdfs.server.datanode.FSDatasetInterface; |
---|
| 29 | import org.apache.hadoop.hdfs.server.datanode.SimulatedFSDataset; |
---|
| 30 | import org.apache.hadoop.util.DataChecksum; |
---|
| 31 | |
---|
| 32 | /** |
---|
| 33 | * this class tests the methods of the SimulatedFSDataset. |
---|
| 34 | * |
---|
| 35 | */ |
---|
| 36 | |
---|
| 37 | public class TestSimulatedFSDataset extends TestCase { |
---|
| 38 | |
---|
| 39 | Configuration conf = null; |
---|
| 40 | |
---|
| 41 | |
---|
| 42 | |
---|
| 43 | static final int NUMBLOCKS = 20; |
---|
| 44 | static final int BLOCK_LENGTH_MULTIPLIER = 79; |
---|
| 45 | |
---|
| 46 | protected void setUp() throws Exception { |
---|
| 47 | super.setUp(); |
---|
| 48 | conf = new Configuration(); |
---|
| 49 | conf.setBoolean(SimulatedFSDataset.CONFIG_PROPERTY_SIMULATED, true); |
---|
| 50 | |
---|
| 51 | } |
---|
| 52 | |
---|
| 53 | protected void tearDown() throws Exception { |
---|
| 54 | super.tearDown(); |
---|
| 55 | } |
---|
| 56 | |
---|
| 57 | long blockIdToLen(long blkid) { |
---|
| 58 | return blkid*BLOCK_LENGTH_MULTIPLIER; |
---|
| 59 | } |
---|
| 60 | |
---|
| 61 | int addSomeBlocks(FSDatasetInterface fsdataset, int startingBlockId) throws IOException { |
---|
| 62 | int bytesAdded = 0; |
---|
| 63 | for (int i = startingBlockId; i < startingBlockId+NUMBLOCKS; ++i) { |
---|
| 64 | Block b = new Block(i, 0, 0); // we pass expected len as zero, - fsdataset should use the sizeof actual data written |
---|
| 65 | OutputStream dataOut = fsdataset.writeToBlock(b, false).dataOut; |
---|
| 66 | assertEquals(0, fsdataset.getLength(b)); |
---|
| 67 | for (int j=1; j <= blockIdToLen(i); ++j) { |
---|
| 68 | dataOut.write(j); |
---|
| 69 | assertEquals(j, fsdataset.getLength(b)); // correct length even as we write |
---|
| 70 | bytesAdded++; |
---|
| 71 | } |
---|
| 72 | dataOut.close(); |
---|
| 73 | b.setNumBytes(blockIdToLen(i)); |
---|
| 74 | fsdataset.finalizeBlock(b); |
---|
| 75 | assertEquals(blockIdToLen(i), fsdataset.getLength(b)); |
---|
| 76 | } |
---|
| 77 | return bytesAdded; |
---|
| 78 | } |
---|
| 79 | int addSomeBlocks(FSDatasetInterface fsdataset ) throws IOException { |
---|
| 80 | return addSomeBlocks(fsdataset, 1); |
---|
| 81 | } |
---|
| 82 | |
---|
| 83 | public void testGetMetaData() throws IOException { |
---|
| 84 | FSDatasetInterface fsdataset = new SimulatedFSDataset(conf); |
---|
| 85 | Block b = new Block(1, 5, 0); |
---|
| 86 | try { |
---|
| 87 | assertFalse(fsdataset.metaFileExists(b)); |
---|
| 88 | assertTrue("Expected an IO exception", false); |
---|
| 89 | } catch (IOException e) { |
---|
| 90 | // ok - as expected |
---|
| 91 | } |
---|
| 92 | addSomeBlocks(fsdataset); // Only need to add one but .... |
---|
| 93 | b = new Block(1, 0, 0); |
---|
| 94 | InputStream metaInput = fsdataset.getMetaDataInputStream(b); |
---|
| 95 | DataInputStream metaDataInput = new DataInputStream(metaInput); |
---|
| 96 | short version = metaDataInput.readShort(); |
---|
| 97 | assertEquals(FSDataset.METADATA_VERSION, version); |
---|
| 98 | DataChecksum checksum = DataChecksum.newDataChecksum(metaDataInput); |
---|
| 99 | assertEquals(DataChecksum.CHECKSUM_NULL, checksum.getChecksumType()); |
---|
| 100 | assertEquals(0, checksum.getChecksumSize()); |
---|
| 101 | } |
---|
| 102 | |
---|
| 103 | |
---|
| 104 | public void testStorageUsage() throws IOException { |
---|
| 105 | FSDatasetInterface fsdataset = new SimulatedFSDataset(conf); |
---|
| 106 | assertEquals(fsdataset.getDfsUsed(), 0); |
---|
| 107 | assertEquals(fsdataset.getRemaining(), fsdataset.getCapacity()); |
---|
| 108 | int bytesAdded = addSomeBlocks(fsdataset); |
---|
| 109 | assertEquals(bytesAdded, fsdataset.getDfsUsed()); |
---|
| 110 | assertEquals(fsdataset.getCapacity()-bytesAdded, fsdataset.getRemaining()); |
---|
| 111 | |
---|
| 112 | } |
---|
| 113 | |
---|
| 114 | |
---|
| 115 | |
---|
| 116 | void checkBlockDataAndSize(FSDatasetInterface fsdataset, |
---|
| 117 | Block b, long expectedLen) throws IOException { |
---|
| 118 | InputStream input = fsdataset.getBlockInputStream(b); |
---|
| 119 | long lengthRead = 0; |
---|
| 120 | int data; |
---|
| 121 | while ((data = input.read()) != -1) { |
---|
| 122 | assertEquals(SimulatedFSDataset.DEFAULT_DATABYTE, data); |
---|
| 123 | lengthRead++; |
---|
| 124 | } |
---|
| 125 | assertEquals(expectedLen, lengthRead); |
---|
| 126 | } |
---|
| 127 | |
---|
| 128 | public void testWriteRead() throws IOException { |
---|
| 129 | FSDatasetInterface fsdataset = new SimulatedFSDataset(conf); |
---|
| 130 | addSomeBlocks(fsdataset); |
---|
| 131 | for (int i=1; i <= NUMBLOCKS; ++i) { |
---|
| 132 | Block b = new Block(i, 0, 0); |
---|
| 133 | assertTrue(fsdataset.isValidBlock(b)); |
---|
| 134 | assertEquals(blockIdToLen(i), fsdataset.getLength(b)); |
---|
| 135 | checkBlockDataAndSize(fsdataset, b, blockIdToLen(i)); |
---|
| 136 | } |
---|
| 137 | } |
---|
| 138 | |
---|
| 139 | |
---|
| 140 | |
---|
| 141 | public void testGetBlockReport() throws IOException { |
---|
| 142 | FSDatasetInterface fsdataset = new SimulatedFSDataset(conf); |
---|
| 143 | Block[] blockReport = fsdataset.getBlockReport(); |
---|
| 144 | assertEquals(0, blockReport.length); |
---|
| 145 | int bytesAdded = addSomeBlocks(fsdataset); |
---|
| 146 | blockReport = fsdataset.getBlockReport(); |
---|
| 147 | assertEquals(NUMBLOCKS, blockReport.length); |
---|
| 148 | for (Block b: blockReport) { |
---|
| 149 | assertNotNull(b); |
---|
| 150 | assertEquals(blockIdToLen(b.getBlockId()), b.getNumBytes()); |
---|
| 151 | } |
---|
| 152 | } |
---|
| 153 | public void testInjectionEmpty() throws IOException { |
---|
| 154 | FSDatasetInterface fsdataset = new SimulatedFSDataset(conf); |
---|
| 155 | Block[] blockReport = fsdataset.getBlockReport(); |
---|
| 156 | assertEquals(0, blockReport.length); |
---|
| 157 | int bytesAdded = addSomeBlocks(fsdataset); |
---|
| 158 | blockReport = fsdataset.getBlockReport(); |
---|
| 159 | assertEquals(NUMBLOCKS, blockReport.length); |
---|
| 160 | for (Block b: blockReport) { |
---|
| 161 | assertNotNull(b); |
---|
| 162 | assertEquals(blockIdToLen(b.getBlockId()), b.getNumBytes()); |
---|
| 163 | } |
---|
| 164 | |
---|
| 165 | // Inject blocks into an empty fsdataset |
---|
| 166 | // - injecting the blocks we got above. |
---|
| 167 | |
---|
| 168 | |
---|
| 169 | SimulatedFSDataset sfsdataset = new SimulatedFSDataset(conf); |
---|
| 170 | sfsdataset.injectBlocks(blockReport); |
---|
| 171 | blockReport = sfsdataset.getBlockReport(); |
---|
| 172 | assertEquals(NUMBLOCKS, blockReport.length); |
---|
| 173 | for (Block b: blockReport) { |
---|
| 174 | assertNotNull(b); |
---|
| 175 | assertEquals(blockIdToLen(b.getBlockId()), b.getNumBytes()); |
---|
| 176 | assertEquals(blockIdToLen(b.getBlockId()), sfsdataset.getLength(b)); |
---|
| 177 | } |
---|
| 178 | assertEquals(bytesAdded, sfsdataset.getDfsUsed()); |
---|
| 179 | assertEquals(sfsdataset.getCapacity()-bytesAdded, sfsdataset.getRemaining()); |
---|
| 180 | } |
---|
| 181 | |
---|
| 182 | public void testInjectionNonEmpty() throws IOException { |
---|
| 183 | FSDatasetInterface fsdataset = new SimulatedFSDataset(conf); |
---|
| 184 | |
---|
| 185 | Block[] blockReport = fsdataset.getBlockReport(); |
---|
| 186 | assertEquals(0, blockReport.length); |
---|
| 187 | int bytesAdded = addSomeBlocks(fsdataset); |
---|
| 188 | blockReport = fsdataset.getBlockReport(); |
---|
| 189 | assertEquals(NUMBLOCKS, blockReport.length); |
---|
| 190 | for (Block b: blockReport) { |
---|
| 191 | assertNotNull(b); |
---|
| 192 | assertEquals(blockIdToLen(b.getBlockId()), b.getNumBytes()); |
---|
| 193 | } |
---|
| 194 | fsdataset = null; |
---|
| 195 | |
---|
| 196 | // Inject blocks into an non-empty fsdataset |
---|
| 197 | // - injecting the blocks we got above. |
---|
| 198 | |
---|
| 199 | |
---|
| 200 | SimulatedFSDataset sfsdataset = new SimulatedFSDataset(conf); |
---|
| 201 | // Add come blocks whose block ids do not conflict with |
---|
| 202 | // the ones we are going to inject. |
---|
| 203 | bytesAdded += addSomeBlocks(sfsdataset, NUMBLOCKS+1); |
---|
| 204 | Block[] blockReport2 = sfsdataset.getBlockReport(); |
---|
| 205 | assertEquals(NUMBLOCKS, blockReport.length); |
---|
| 206 | blockReport2 = sfsdataset.getBlockReport(); |
---|
| 207 | assertEquals(NUMBLOCKS, blockReport.length); |
---|
| 208 | sfsdataset.injectBlocks(blockReport); |
---|
| 209 | blockReport = sfsdataset.getBlockReport(); |
---|
| 210 | assertEquals(NUMBLOCKS*2, blockReport.length); |
---|
| 211 | for (Block b: blockReport) { |
---|
| 212 | assertNotNull(b); |
---|
| 213 | assertEquals(blockIdToLen(b.getBlockId()), b.getNumBytes()); |
---|
| 214 | assertEquals(blockIdToLen(b.getBlockId()), sfsdataset.getLength(b)); |
---|
| 215 | } |
---|
| 216 | assertEquals(bytesAdded, sfsdataset.getDfsUsed()); |
---|
| 217 | assertEquals(sfsdataset.getCapacity()-bytesAdded, sfsdataset.getRemaining()); |
---|
| 218 | |
---|
| 219 | |
---|
| 220 | // Now test that the dataset cannot be created if it does not have sufficient cap |
---|
| 221 | |
---|
| 222 | conf.setLong(SimulatedFSDataset.CONFIG_PROPERTY_CAPACITY, 10); |
---|
| 223 | |
---|
| 224 | try { |
---|
| 225 | sfsdataset = new SimulatedFSDataset(conf); |
---|
| 226 | sfsdataset.injectBlocks(blockReport); |
---|
| 227 | assertTrue("Expected an IO exception", false); |
---|
| 228 | } catch (IOException e) { |
---|
| 229 | // ok - as expected |
---|
| 230 | } |
---|
| 231 | |
---|
| 232 | } |
---|
| 233 | |
---|
| 234 | public void checkInvalidBlock(Block b) throws IOException { |
---|
| 235 | FSDatasetInterface fsdataset = new SimulatedFSDataset(conf); |
---|
| 236 | assertFalse(fsdataset.isValidBlock(b)); |
---|
| 237 | try { |
---|
| 238 | fsdataset.getLength(b); |
---|
| 239 | assertTrue("Expected an IO exception", false); |
---|
| 240 | } catch (IOException e) { |
---|
| 241 | // ok - as expected |
---|
| 242 | } |
---|
| 243 | |
---|
| 244 | try { |
---|
| 245 | fsdataset.getBlockInputStream(b); |
---|
| 246 | assertTrue("Expected an IO exception", false); |
---|
| 247 | } catch (IOException e) { |
---|
| 248 | // ok - as expected |
---|
| 249 | } |
---|
| 250 | |
---|
| 251 | try { |
---|
| 252 | fsdataset.finalizeBlock(b); |
---|
| 253 | assertTrue("Expected an IO exception", false); |
---|
| 254 | } catch (IOException e) { |
---|
| 255 | // ok - as expected |
---|
| 256 | } |
---|
| 257 | |
---|
| 258 | } |
---|
| 259 | |
---|
| 260 | public void testInValidBlocks() throws IOException { |
---|
| 261 | FSDatasetInterface fsdataset = new SimulatedFSDataset(conf); |
---|
| 262 | Block b = new Block(1, 5, 0); |
---|
| 263 | checkInvalidBlock(b); |
---|
| 264 | |
---|
| 265 | // Now check invlaid after adding some blocks |
---|
| 266 | addSomeBlocks(fsdataset); |
---|
| 267 | b = new Block(NUMBLOCKS + 99, 5, 0); |
---|
| 268 | checkInvalidBlock(b); |
---|
| 269 | |
---|
| 270 | } |
---|
| 271 | |
---|
| 272 | public void testInvalidate() throws IOException { |
---|
| 273 | FSDatasetInterface fsdataset = new SimulatedFSDataset(conf); |
---|
| 274 | int bytesAdded = addSomeBlocks(fsdataset); |
---|
| 275 | Block[] deleteBlocks = new Block[2]; |
---|
| 276 | deleteBlocks[0] = new Block(1, 0, 0); |
---|
| 277 | deleteBlocks[1] = new Block(2, 0, 0); |
---|
| 278 | fsdataset.invalidate(deleteBlocks); |
---|
| 279 | checkInvalidBlock(deleteBlocks[0]); |
---|
| 280 | checkInvalidBlock(deleteBlocks[1]); |
---|
| 281 | long sizeDeleted = blockIdToLen(1) + blockIdToLen(2); |
---|
| 282 | assertEquals(bytesAdded-sizeDeleted, fsdataset.getDfsUsed()); |
---|
| 283 | assertEquals(fsdataset.getCapacity()-bytesAdded+sizeDeleted, fsdataset.getRemaining()); |
---|
| 284 | |
---|
| 285 | |
---|
| 286 | |
---|
| 287 | // Now make sure the rest of the blocks are valid |
---|
| 288 | for (int i=3; i <= NUMBLOCKS; ++i) { |
---|
| 289 | Block b = new Block(i, 0, 0); |
---|
| 290 | assertTrue(fsdataset.isValidBlock(b)); |
---|
| 291 | } |
---|
| 292 | } |
---|
| 293 | |
---|
| 294 | } |
---|