/*
*
* 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.hbase.io.hfile;
import static org.junit.Assert.*;
import java.io.ByteArrayOutputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Random;
import java.util.concurrent.Callable;
import java.util.concurrent.Executor;
import java.util.concurrent.ExecutorCompletionService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.fs.FSDataInputStream;
import org.apache.hadoop.fs.FSDataOutputStream;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hbase.HBaseTestingUtility;
import org.apache.hadoop.hbase.HConstants;
import org.apache.hadoop.hbase.MediumTests;
import org.apache.hadoop.hbase.KeyValue;
import org.apache.hadoop.hbase.fs.HFileSystem;
import org.apache.hadoop.hbase.io.DoubleOutputStream;
import org.apache.hadoop.hbase.io.compress.Compression;
import org.apache.hadoop.hbase.io.compress.Compression.Algorithm;
import org.apache.hadoop.hbase.io.encoding.DataBlockEncoder;
import org.apache.hadoop.hbase.io.encoding.DataBlockEncoding;
import org.apache.hadoop.hbase.io.encoding.HFileBlockDefaultEncodingContext;
import org.apache.hadoop.hbase.io.encoding.HFileBlockEncodingContext;
import org.apache.hadoop.hbase.util.Bytes;
import org.apache.hadoop.hbase.util.ChecksumType;
import org.apache.hadoop.hbase.util.ClassSize;
import org.apache.hadoop.io.WritableUtils;
import org.apache.hadoop.io.compress.Compressor;
import static org.apache.hadoop.hbase.io.compress.Compression.Algorithm.*;
import org.junit.Before;
import org.junit.Test;
import org.junit.experimental.categories.Category;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import org.junit.runners.Parameterized.Parameters;
@Category(MediumTests.class)
@RunWith(Parameterized.class)
public class TestHFileBlock {
// change this value to activate more logs
private static final boolean detailedLogging = false;
private static final boolean[] BOOLEAN_VALUES = new boolean[] { false, true };
private static final Log LOG = LogFactory.getLog(TestHFileBlock.class);
static final Compression.Algorithm[] COMPRESSION_ALGORITHMS = {
NONE, GZ };
private static final int NUM_TEST_BLOCKS = 1000;
private static final int NUM_READER_THREADS = 26;
// Used to generate KeyValues
private static int NUM_KEYVALUES = 50;
private static int FIELD_LENGTH = 10;
private static float CHANCE_TO_REPEAT = 0.6f;
private static final HBaseTestingUtility TEST_UTIL =
new HBaseTestingUtility();
private FileSystem fs;
private int uncompressedSizeV1;
private final boolean includesMemstoreTS;
public TestHFileBlock(boolean includesMemstoreTS) {
this.includesMemstoreTS = includesMemstoreTS;
}
@Parameters
public static Collection<Object[]> parameters() {
return HBaseTestingUtility.BOOLEAN_PARAMETERIZED;
}
@Before
public void setUp() throws IOException {
fs = HFileSystem.get(TEST_UTIL.getConfiguration());
}
static void writeTestBlockContents(DataOutputStream dos) throws IOException {
// This compresses really well.
for (int i = 0; i < 1000; ++i)
dos.writeInt(i / 100);
}
static int writeTestKeyValues(OutputStream dos, int seed, boolean includesMemstoreTS)
throws IOException {
List<KeyValue> keyValues = new ArrayList<KeyValue>();
Random randomizer = new Random(42l + seed); // just any fixed number
// generate keyValues
for (int i = 0; i < NUM_KEYVALUES; ++i) {
byte[] row;
long timestamp;
byte[] family;
byte[] qualifier;
byte[] value;
// generate it or repeat, it should compress well
if (0 < i && randomizer.nextFloat() < CHANCE_TO_REPEAT) {
row = keyValues.get(randomizer.nextInt(keyValues.size())).getRow();
} else {
row = new byte[FIELD_LENGTH];
randomizer.nextBytes(row);
}
if (0 == i) {
family = new byte[FIELD_LENGTH];
randomizer.nextBytes(family);
} else {
family = keyValues.get(0).getFamily();
}
if (0 < i && randomizer.nextFloat() < CHANCE_TO_REPEAT) {
qualifier = keyValues.get(
randomizer.nextInt(keyValues.size())).getQualifier();
} else {
qualifier = new byte[FIELD_LENGTH];
randomizer.nextBytes(qualifier);
}
if (0 < i && randomizer.nextFloat() < CHANCE_TO_REPEAT) {
value = keyValues.get(randomizer.nextInt(keyValues.size())).getValue();
} else {
value = new byte[FIELD_LENGTH];
randomizer.nextBytes(value);
}
if (0 < i && randomizer.nextFloat() < CHANCE_TO_REPEAT) {
timestamp = keyValues.get(
randomizer.nextInt(keyValues.size())).getTimestamp();
} else {
timestamp = randomizer.nextLong();
}
keyValues.add(new KeyValue(row, family, qualifier, timestamp, value));
}
// sort it and write to stream
int totalSize = 0;
Collections.sort(keyValues, KeyValue.COMPARATOR);
DataOutputStream dataOutputStream = new DataOutputStream(dos);
for (KeyValue kv : keyValues) {
totalSize += kv.getLength();
dataOutputStream.write(kv.getBuffer(), kv.getOffset(), kv.getLength());
if (includesMemstoreTS) {
long memstoreTS = randomizer.nextLong();
WritableUtils.writeVLong(dataOutputStream, memstoreTS);
totalSize += WritableUtils.getVIntSize(memstoreTS);
}
}
return totalSize;
}
public byte[] createTestV1Block(Compression.Algorithm algo)
throws IOException {
Compressor compressor = algo.getCompressor();
ByteArrayOutputStream baos = new ByteArrayOutputStream();
OutputStream os = algo.createCompressionStream(baos, compressor, 0);
DataOutputStream dos = new DataOutputStream(os);
BlockType.META.write(dos); // Let's make this a meta block.
writeTestBlockContents(dos);
uncompressedSizeV1 = dos.size();
dos.flush();
algo.returnCompressor(compressor);
return baos.toByteArray();
}
static HFileBlock.Writer createTestV2Block(Compression.Algorithm algo,
boolean includesMemstoreTS) throws IOException {
final BlockType blockType = BlockType.DATA;
HFileBlock.Writer hbw = new HFileBlock.Writer(algo, null,
includesMemstoreTS, HFile.DEFAULT_CHECKSUM_TYPE,
HFile.DEFAULT_BYTES_PER_CHECKSUM);
DataOutputStream dos = hbw.startWriting(blockType);
writeTestBlockContents(dos);
dos.flush();
byte[] headerAndData = hbw.getHeaderAndDataForTest();
assertEquals(1000 * 4, hbw.getUncompressedSizeWithoutHeader());
hbw.release();
return hbw;
}
public String createTestBlockStr(Compression.Algorithm algo,
int correctLength) throws IOException {
HFileBlock.Writer hbw = createTestV2Block(algo, includesMemstoreTS);
byte[] testV2Block = hbw.getHeaderAndDataForTest();
int osOffset = HConstants.HFILEBLOCK_HEADER_SIZE + 9;
if (testV2Block.length == correctLength) {
// Force-set the "OS" field of the gzip header to 3 (Unix) to avoid
// variations across operating systems.
// See http://www.gzip.org/zlib/rfc-gzip.html for gzip format.
// We only make this change when the compressed block length matches.
// Otherwise, there are obviously other inconsistencies.
testV2Block[osOffset] = 3;
}
return Bytes.toStringBinary(testV2Block);
}
@Test
public void testNoCompression() throws IOException {
assertEquals(4000, createTestV2Block(NONE, includesMemstoreTS).
getBlockForCaching().getUncompressedSizeWithoutHeader());
}
@Test
public void testGzipCompression() throws IOException {
final String correctTestBlockStr =
"DATABLK*\\x00\\x00\\x00>\\x00\\x00\\x0F\\xA0\\xFF\\xFF\\xFF\\xFF"
+ "\\xFF\\xFF\\xFF\\xFF"
+ "\\x01\\x00\\x00@\\x00\\x00\\x00\\x00["
// gzip-compressed block: http://www.gzip.org/zlib/rfc-gzip.html
+ "\\x1F\\x8B" // gzip magic signature
+ "\\x08" // Compression method: 8 = "deflate"
+ "\\x00" // Flags
+ "\\x00\\x00\\x00\\x00" // mtime
+ "\\x00" // XFL (extra flags)
// OS (0 = FAT filesystems, 3 = Unix). However, this field
// sometimes gets set to 0 on Linux and Mac, so we reset it to 3.
// This appears to be a difference caused by the availability
// (and use) of the native GZ codec.
+ "\\x03"
+ "\\xED\\xC3\\xC1\\x11\\x00 \\x08\\xC00DD\\xDD\\x7Fa"
+ "\\xD6\\xE8\\xA3\\xB9K\\x84`\\x96Q\\xD3\\xA8\\xDB\\xA8e\\xD4c"
+ "\\xD46\\xEA5\\xEA3\\xEA7\\xE7\\x00LI\\x5Cs\\xA0\\x0F\\x00\\x00"
+ "\\x00\\x00\\x00\\x00"; // 4 byte checksum (ignored)
final int correctGzipBlockLength = 95;
final String testBlockStr = createTestBlockStr(GZ, correctGzipBlockLength);
// We ignore the block checksum because createTestBlockStr can change the
// gzip header after the block is produced
assertEquals(correctTestBlockStr.substring(0, correctGzipBlockLength - 4),
testBlockStr.substring(0, correctGzipBlockLength - 4));
}
@Test
public void testReaderV2() throws IOException {
for (Compression.Algorithm algo : COMPRESSION_ALGORITHMS) {
for (boolean pread : new boolean[] { false, true }) {
LOG.info("testReaderV2: Compression algorithm: " + algo +
", pread=" + pread);
Path path = new Path(TEST_UTIL.getDataTestDir(), "blocks_v2_"
+ algo);
FSDataOutputStream os = fs.create(path);
HFileBlock.Writer hbw = new HFileBlock.Writer(algo, null,
includesMemstoreTS, HFile.DEFAULT_CHECKSUM_TYPE,
HFile.DEFAULT_BYTES_PER_CHECKSUM);
long totalSize = 0;
for (int blockId = 0; blockId < 2; ++blockId) {
DataOutputStream dos = hbw.startWriting(BlockType.DATA);
for (int i = 0; i < 1234; ++i)
dos.writeInt(i);
hbw.writeHeaderAndData(os);
totalSize += hbw.getOnDiskSizeWithHeader();
}
os.close();
FSDataInputStream is = fs.open(path);
HFileBlock.FSReader hbr = new HFileBlock.FSReaderV2(is, algo,
totalSize);
HFileBlock b = hbr.readBlockData(0, -1, -1, pread);
is.close();
assertEquals(0, HFile.getChecksumFailuresCount());
b.sanityCheck();
assertEquals(4936, b.getUncompressedSizeWithoutHeader());
assertEquals(algo == GZ ? 2173 : 4936,
b.getOnDiskSizeWithoutHeader() - b.totalChecksumBytes());
String blockStr = b.toString();
if (algo == GZ) {
is = fs.open(path);
hbr = new HFileBlock.FSReaderV2(is, algo, totalSize);
b = hbr.readBlockData(0, 2173 + HConstants.HFILEBLOCK_HEADER_SIZE +
b.totalChecksumBytes(), -1, pread);
assertEquals(blockStr, b.toString());
int wrongCompressedSize = 2172;
try {
b = hbr.readBlockData(0, wrongCompressedSize
+ HConstants.HFILEBLOCK_HEADER_SIZE, -1, pread);
fail("Exception expected");
} catch (IOException ex) {
String expectedPrefix = "On-disk size without header provided is "
+ wrongCompressedSize + ", but block header contains "
+ b.getOnDiskSizeWithoutHeader() + ".";
assertTrue("Invalid exception message: '" + ex.getMessage()
+ "'.\nMessage is expected to start with: '" + expectedPrefix
+ "'", ex.getMessage().startsWith(expectedPrefix));
}
is.close();
}
}
}
}
/**
* Test encoding/decoding data blocks.
* @throws IOException a bug or a problem with temporary files.
*/
@Test
public void testDataBlockEncoding() throws IOException {
final int numBlocks = 5;
for (Compression.Algorithm algo : COMPRESSION_ALGORITHMS) {
for (boolean pread : new boolean[] { false, true }) {
for (DataBlockEncoding encoding : DataBlockEncoding.values()) {
Path path = new Path(TEST_UTIL.getDataTestDir(), "blocks_v2_"
+ algo + "_" + encoding.toString());
FSDataOutputStream os = fs.create(path);
HFileDataBlockEncoder dataBlockEncoder =
new HFileDataBlockEncoderImpl(encoding);
HFileBlock.Writer hbw = new HFileBlock.Writer(algo, dataBlockEncoder,
includesMemstoreTS, HFile.DEFAULT_CHECKSUM_TYPE,
HFile.DEFAULT_BYTES_PER_CHECKSUM);
long totalSize = 0;
final List<Integer> encodedSizes = new ArrayList<Integer>();
final List<ByteBuffer> encodedBlocks = new ArrayList<ByteBuffer>();
for (int blockId = 0; blockId < numBlocks; ++blockId) {
DataOutputStream dos = hbw.startWriting(BlockType.DATA);
writeEncodedBlock(algo, encoding, dos, encodedSizes, encodedBlocks,
blockId, includesMemstoreTS, HConstants.HFILEBLOCK_DUMMY_HEADER);
hbw.writeHeaderAndData(os);
totalSize += hbw.getOnDiskSizeWithHeader();
}
os.close();
FSDataInputStream is = fs.open(path);
HFileBlock.FSReaderV2 hbr = new HFileBlock.FSReaderV2(is, algo,
totalSize);
hbr.setDataBlockEncoder(dataBlockEncoder);
hbr.setIncludesMemstoreTS(includesMemstoreTS);
HFileBlock b;
int pos = 0;
for (int blockId = 0; blockId < numBlocks; ++blockId) {
b = hbr.readBlockData(pos, -1, -1, pread);
assertEquals(0, HFile.getChecksumFailuresCount());
b.sanityCheck();
pos += b.getOnDiskSizeWithHeader();
assertEquals((int) encodedSizes.get(blockId),
b.getUncompressedSizeWithoutHeader());
ByteBuffer actualBuffer = b.getBufferWithoutHeader();
if (encoding != DataBlockEncoding.NONE) {
// We expect a two-byte big-endian encoding id.
assertEquals(0, actualBuffer.get(0));
assertEquals(encoding.getId(), actualBuffer.get(1));
actualBuffer.position(2);
actualBuffer = actualBuffer.slice();
}
ByteBuffer expectedBuffer = encodedBlocks.get(blockId);
expectedBuffer.rewind();
// test if content matches, produce nice message
assertBuffersEqual(expectedBuffer, actualBuffer, algo, encoding,
pread);
}
is.close();
}
}
}
}
static void writeEncodedBlock(Algorithm algo, DataBlockEncoding encoding,
DataOutputStream dos, final List<Integer> encodedSizes,
final List<ByteBuffer> encodedBlocks, int blockId,
boolean includesMemstoreTS, byte[] dummyHeader) throws IOException {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
DoubleOutputStream doubleOutputStream =
new DoubleOutputStream(dos, baos);
writeTestKeyValues(doubleOutputStream, blockId, includesMemstoreTS);
ByteBuffer rawBuf = ByteBuffer.wrap(baos.toByteArray());
rawBuf.rewind();
DataBlockEncoder encoder = encoding.getEncoder();
int headerLen = dummyHeader.length;
byte[] encodedResultWithHeader = null;
if (encoder != null) {
HFileBlockEncodingContext encodingCtx =
encoder.newDataBlockEncodingContext(algo, encoding, dummyHeader);
encoder.encodeKeyValues(rawBuf, includesMemstoreTS,
encodingCtx);
encodedResultWithHeader =
encodingCtx.getUncompressedBytesWithHeader();
} else {
HFileBlockDefaultEncodingContext defaultEncodingCtx =
new HFileBlockDefaultEncodingContext(algo, encoding, dummyHeader);
byte[] rawBufWithHeader =
new byte[rawBuf.array().length + headerLen];
System.arraycopy(rawBuf.array(), 0, rawBufWithHeader,
headerLen, rawBuf.array().length);
defaultEncodingCtx.compressAfterEncodingWithBlockType(rawBufWithHeader,
BlockType.DATA);
encodedResultWithHeader =
defaultEncodingCtx.getUncompressedBytesWithHeader();
}
final int encodedSize =
encodedResultWithHeader.length - headerLen;
if (encoder != null) {
// We need to account for the two-byte encoding algorithm ID that
// comes after the 24-byte block header but before encoded KVs.
headerLen += DataBlockEncoding.ID_SIZE;
}
byte[] encodedDataSection =
new byte[encodedResultWithHeader.length - headerLen];
System.arraycopy(encodedResultWithHeader, headerLen,
encodedDataSection, 0, encodedDataSection.length);
final ByteBuffer encodedBuf =
ByteBuffer.wrap(encodedDataSection);
encodedSizes.add(encodedSize);
encodedBlocks.add(encodedBuf);
}
static void assertBuffersEqual(ByteBuffer expectedBuffer,
ByteBuffer actualBuffer, Compression.Algorithm compression,
DataBlockEncoding encoding, boolean pread) {
if (!actualBuffer.equals(expectedBuffer)) {
int prefix = 0;
int minLimit = Math.min(expectedBuffer.limit(), actualBuffer.limit());
while (prefix < minLimit &&
expectedBuffer.get(prefix) == actualBuffer.get(prefix)) {
prefix++;
}
fail(String.format(
"Content mismath for compression %s, encoding %s, " +
"pread %s, commonPrefix %d, expected %s, got %s",
compression, encoding, pread, prefix,
nextBytesToStr(expectedBuffer, prefix),
nextBytesToStr(actualBuffer, prefix)));
}
}
/**
* Convert a few next bytes in the given buffer at the given position to
* string. Used for error messages.
*/
private static String nextBytesToStr(ByteBuffer buf, int pos) {
int maxBytes = buf.limit() - pos;
int numBytes = Math.min(16, maxBytes);
return Bytes.toStringBinary(buf.array(), buf.arrayOffset() + pos,
numBytes) + (numBytes < maxBytes ? "..." : "");
}
@Test
public void testPreviousOffset() throws IOException {
for (Compression.Algorithm algo : COMPRESSION_ALGORITHMS) {
for (boolean pread : BOOLEAN_VALUES) {
for (boolean cacheOnWrite : BOOLEAN_VALUES) {
Random rand = defaultRandom();
LOG.info("testPreviousOffset:Compression algorithm: " + algo +
", pread=" + pread +
", cacheOnWrite=" + cacheOnWrite);
Path path = new Path(TEST_UTIL.getDataTestDir(), "prev_offset");
List<Long> expectedOffsets = new ArrayList<Long>();
List<Long> expectedPrevOffsets = new ArrayList<Long>();
List<BlockType> expectedTypes = new ArrayList<BlockType>();
List<ByteBuffer> expectedContents = cacheOnWrite
? new ArrayList<ByteBuffer>() : null;
long totalSize = writeBlocks(rand, algo, path, expectedOffsets,
expectedPrevOffsets, expectedTypes, expectedContents);
FSDataInputStream is = fs.open(path);
HFileBlock.FSReader hbr = new HFileBlock.FSReaderV2(is, algo,
totalSize);
long curOffset = 0;
for (int i = 0; i < NUM_TEST_BLOCKS; ++i) {
if (!pread) {
assertEquals(is.getPos(), curOffset + (i == 0 ? 0 :
HConstants.HFILEBLOCK_HEADER_SIZE));
}
assertEquals(expectedOffsets.get(i).longValue(), curOffset);
if (detailedLogging) {
LOG.info("Reading block #" + i + " at offset " + curOffset);
}
HFileBlock b = hbr.readBlockData(curOffset, -1, -1, pread);
if (detailedLogging) {
LOG.info("Block #" + i + ": " + b);
}
assertEquals("Invalid block #" + i + "'s type:",
expectedTypes.get(i), b.getBlockType());
assertEquals("Invalid previous block offset for block " + i
+ " of " + "type " + b.getBlockType() + ":",
(long) expectedPrevOffsets.get(i), b.getPrevBlockOffset());
b.sanityCheck();
assertEquals(curOffset, b.getOffset());
// Now re-load this block knowing the on-disk size. This tests a
// different branch in the loader.
HFileBlock b2 = hbr.readBlockData(curOffset,
b.getOnDiskSizeWithHeader(), -1, pread);
b2.sanityCheck();
assertEquals(b.getBlockType(), b2.getBlockType());
assertEquals(b.getOnDiskSizeWithoutHeader(),
b2.getOnDiskSizeWithoutHeader());
assertEquals(b.getOnDiskSizeWithHeader(),
b2.getOnDiskSizeWithHeader());
assertEquals(b.getUncompressedSizeWithoutHeader(),
b2.getUncompressedSizeWithoutHeader());
assertEquals(b.getPrevBlockOffset(), b2.getPrevBlockOffset());
assertEquals(curOffset, b2.getOffset());
assertEquals(b.getBytesPerChecksum(), b2.getBytesPerChecksum());
assertEquals(b.getOnDiskDataSizeWithHeader(),
b2.getOnDiskDataSizeWithHeader());
assertEquals(0, HFile.getChecksumFailuresCount());
curOffset += b.getOnDiskSizeWithHeader();
if (cacheOnWrite) {
// In the cache-on-write mode we store uncompressed bytes so we
// can compare them to what was read by the block reader.
// b's buffer has header + data + checksum while
// expectedContents have header + data only
ByteBuffer bufRead = b.getBufferWithHeader();
ByteBuffer bufExpected = expectedContents.get(i);
boolean bytesAreCorrect = Bytes.compareTo(bufRead.array(),
bufRead.arrayOffset(),
bufRead.limit() - b.totalChecksumBytes(),
bufExpected.array(), bufExpected.arrayOffset(),
bufExpected.limit()) == 0;
String wrongBytesMsg = "";
if (!bytesAreCorrect) {
// Optimization: only construct an error message in case we
// will need it.
wrongBytesMsg = "Expected bytes in block #" + i + " (algo="
+ algo + ", pread=" + pread
+ ", cacheOnWrite=" + cacheOnWrite + "):\n";
wrongBytesMsg += Bytes.toStringBinary(bufExpected.array(),
bufExpected.arrayOffset(), Math.min(32,
bufExpected.limit()))
+ ", actual:\n"
+ Bytes.toStringBinary(bufRead.array(),
bufRead.arrayOffset(), Math.min(32, bufRead.limit()));
if (detailedLogging) {
LOG.warn("expected header" +
HFileBlock.toStringHeader(bufExpected) +
"\nfound header" +
HFileBlock.toStringHeader(bufRead));
LOG.warn("bufread offset " + bufRead.arrayOffset() +
" limit " + bufRead.limit() +
" expected offset " + bufExpected.arrayOffset() +
" limit " + bufExpected.limit());
LOG.warn(wrongBytesMsg);
}
}
assertTrue(wrongBytesMsg, bytesAreCorrect);
}
}
assertEquals(curOffset, fs.getFileStatus(path).getLen());
is.close();
}
}
}
}
private Random defaultRandom() {
return new Random(189237);
}
private class BlockReaderThread implements Callable<Boolean> {
private final String clientId;
private final HFileBlock.FSReader hbr;
private final List<Long> offsets;
private final List<BlockType> types;
private final long fileSize;
public BlockReaderThread(String clientId,
HFileBlock.FSReader hbr, List<Long> offsets, List<BlockType> types,
long fileSize) {
this.clientId = clientId;
this.offsets = offsets;
this.hbr = hbr;
this.types = types;
this.fileSize = fileSize;
}
@Override
public Boolean call() throws Exception {
Random rand = new Random(clientId.hashCode());
long endTime = System.currentTimeMillis() + 10000;
int numBlocksRead = 0;
int numPositionalRead = 0;
int numWithOnDiskSize = 0;
while (System.currentTimeMillis() < endTime) {
int blockId = rand.nextInt(NUM_TEST_BLOCKS);
long offset = offsets.get(blockId);
boolean pread = rand.nextBoolean();
boolean withOnDiskSize = rand.nextBoolean();
long expectedSize =
(blockId == NUM_TEST_BLOCKS - 1 ? fileSize
: offsets.get(blockId + 1)) - offset;
HFileBlock b;
try {
long onDiskSizeArg = withOnDiskSize ? expectedSize : -1;
b = hbr.readBlockData(offset, onDiskSizeArg, -1, pread);
} catch (IOException ex) {
LOG.error("Error in client " + clientId + " trying to read block at "
+ offset + ", pread=" + pread + ", withOnDiskSize=" +
withOnDiskSize, ex);
return false;
}
assertEquals(types.get(blockId), b.getBlockType());
assertEquals(expectedSize, b.getOnDiskSizeWithHeader());
assertEquals(offset, b.getOffset());
++numBlocksRead;
if (pread)
++numPositionalRead;
if (withOnDiskSize)
++numWithOnDiskSize;
}
LOG.info("Client " + clientId + " successfully read " + numBlocksRead +
" blocks (with pread: " + numPositionalRead + ", with onDiskSize " +
"specified: " + numWithOnDiskSize + ")");
return true;
}
}
@Test
public void testConcurrentReading() throws Exception {
for (Compression.Algorithm compressAlgo : COMPRESSION_ALGORITHMS) {
Path path =
new Path(TEST_UTIL.getDataTestDir(), "concurrent_reading");
Random rand = defaultRandom();
List<Long> offsets = new ArrayList<Long>();
List<BlockType> types = new ArrayList<BlockType>();
writeBlocks(rand, compressAlgo, path, offsets, null, types, null);
FSDataInputStream is = fs.open(path);
long fileSize = fs.getFileStatus(path).getLen();
HFileBlock.FSReader hbr = new HFileBlock.FSReaderV2(is, compressAlgo,
fileSize);
Executor exec = Executors.newFixedThreadPool(NUM_READER_THREADS);
ExecutorCompletionService<Boolean> ecs =
new ExecutorCompletionService<Boolean>(exec);
for (int i = 0; i < NUM_READER_THREADS; ++i) {
ecs.submit(new BlockReaderThread("reader_" + (char) ('A' + i), hbr,
offsets, types, fileSize));
}
for (int i = 0; i < NUM_READER_THREADS; ++i) {
Future<Boolean> result = ecs.take();
assertTrue(result.get());
if (detailedLogging) {
LOG.info(String.valueOf(i + 1)
+ " reader threads finished successfully (algo=" + compressAlgo
+ ")");
}
}
is.close();
}
}
private long writeBlocks(Random rand, Compression.Algorithm compressAlgo,
Path path, List<Long> expectedOffsets, List<Long> expectedPrevOffsets,
List<BlockType> expectedTypes, List<ByteBuffer> expectedContents
) throws IOException {
boolean cacheOnWrite = expectedContents != null;
FSDataOutputStream os = fs.create(path);
HFileBlock.Writer hbw = new HFileBlock.Writer(compressAlgo, null,
includesMemstoreTS, HFile.DEFAULT_CHECKSUM_TYPE,
HFile.DEFAULT_BYTES_PER_CHECKSUM);
Map<BlockType, Long> prevOffsetByType = new HashMap<BlockType, Long>();
long totalSize = 0;
for (int i = 0; i < NUM_TEST_BLOCKS; ++i) {
long pos = os.getPos();
int blockTypeOrdinal = rand.nextInt(BlockType.values().length);
if (blockTypeOrdinal == BlockType.ENCODED_DATA.ordinal()) {
blockTypeOrdinal = BlockType.DATA.ordinal();
}
BlockType bt = BlockType.values()[blockTypeOrdinal];
DataOutputStream dos = hbw.startWriting(bt);
int size = rand.nextInt(500);
for (int j = 0; j < size; ++j) {
// This might compress well.
dos.writeShort(i + 1);
dos.writeInt(j + 1);
}
if (expectedOffsets != null)
expectedOffsets.add(os.getPos());
if (expectedPrevOffsets != null) {
Long prevOffset = prevOffsetByType.get(bt);
expectedPrevOffsets.add(prevOffset != null ? prevOffset : -1);
prevOffsetByType.put(bt, os.getPos());
}
expectedTypes.add(bt);
hbw.writeHeaderAndData(os);
totalSize += hbw.getOnDiskSizeWithHeader();
if (cacheOnWrite)
expectedContents.add(hbw.getUncompressedBufferWithHeader());
if (detailedLogging) {
LOG.info("Written block #" + i + " of type " + bt
+ ", uncompressed size " + hbw.getUncompressedSizeWithoutHeader()
+ " at offset " + pos);
}
}
os.close();
LOG.info("Created a temporary file at " + path + ", "
+ fs.getFileStatus(path).getLen() + " byte, compression=" +
compressAlgo);
return totalSize;
}
@Test
public void testBlockHeapSize() {
if (ClassSize.is32BitJVM()) {
assertTrue(HFileBlock.BYTE_BUFFER_HEAP_SIZE == 64);
} else {
assertTrue(HFileBlock.BYTE_BUFFER_HEAP_SIZE == 80);
}
for (int size : new int[] { 100, 256, 12345 }) {
byte[] byteArr = new byte[HConstants.HFILEBLOCK_HEADER_SIZE + size];
ByteBuffer buf = ByteBuffer.wrap(byteArr, 0, size);
HFileBlock block = new HFileBlock(BlockType.DATA, size, size, -1, buf,
HFileBlock.FILL_HEADER, -1, includesMemstoreTS,
HFileBlock.MINOR_VERSION_NO_CHECKSUM, 0, ChecksumType.NULL.getCode(),
0);
long byteBufferExpectedSize =
ClassSize.align(ClassSize.estimateBase(buf.getClass(), true)
+ HConstants.HFILEBLOCK_HEADER_SIZE + size);
long hfileBlockExpectedSize =
ClassSize.align(ClassSize.estimateBase(HFileBlock.class, true));
long expected = hfileBlockExpectedSize + byteBufferExpectedSize;
assertEquals("Block data size: " + size + ", byte buffer expected " +
"size: " + byteBufferExpectedSize + ", HFileBlock class expected " +
"size: " + hfileBlockExpectedSize + ";", expected,
block.heapSize());
}
}
}