HDFS-8166. DFSStripedOutputStream should not create empty blocks. Contributed by Jing Zhao.
This commit is contained in:
Jing Zhao
Zhe Zhang
parent
909632dd90
commit
cd458c38a0
@ -22,10 +22,14 @@
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import java.nio.ByteBuffer;
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import java.nio.channels.ClosedChannelException;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.Collections;
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import java.util.EnumSet;
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import java.util.List;
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import java.util.concurrent.BlockingQueue;
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import java.util.concurrent.LinkedBlockingQueue;
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import org.apache.hadoop.HadoopIllegalArgumentException;
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import org.apache.hadoop.classification.InterfaceAudience;
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import org.apache.hadoop.fs.CreateFlag;
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import org.apache.hadoop.hdfs.protocol.ExtendedBlock;
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@ -59,12 +63,12 @@ public class DFSStripedOutputStream extends DFSOutputStream {
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*/
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private int cellSize = HdfsConstants.BLOCK_STRIPED_CELL_SIZE;
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private ByteBuffer[] cellBuffers;
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private final short blockGroupBlocks = HdfsConstants.NUM_DATA_BLOCKS
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private final short numAllBlocks = HdfsConstants.NUM_DATA_BLOCKS
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+ HdfsConstants.NUM_PARITY_BLOCKS;
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private final short blockGroupDataBlocks = HdfsConstants.NUM_DATA_BLOCKS;
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private final short numDataBlocks = HdfsConstants.NUM_DATA_BLOCKS;
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private int curIdx = 0;
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/* bytes written in current block group */
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private long currentBlockGroupBytes = 0;
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//private long currentBlockGroupBytes = 0;
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//TODO: Use ErasureCoder interface (HDFS-7781)
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private RawErasureEncoder encoder;
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@ -73,10 +77,6 @@ private StripedDataStreamer getLeadingStreamer() {
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return streamers.get(0);
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}
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private long getBlockGroupSize() {
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return blockSize * HdfsConstants.NUM_DATA_BLOCKS;
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}
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/** Construct a new output stream for creating a file. */
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DFSStripedOutputStream(DFSClient dfsClient, String src, HdfsFileStatus stat,
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EnumSet<CreateFlag> flag, Progressable progress,
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@ -84,15 +84,13 @@ private long getBlockGroupSize() {
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throws IOException {
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super(dfsClient, src, stat, flag, progress, checksum, favoredNodes);
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DFSClient.LOG.info("Creating striped output stream");
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if (blockGroupBlocks <= 1) {
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throw new IOException("The block group must contain more than one block.");
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}
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checkConfiguration();
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cellBuffers = new ByteBuffer[blockGroupBlocks];
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cellBuffers = new ByteBuffer[numAllBlocks];
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List<BlockingQueue<LocatedBlock>> stripeBlocks = new ArrayList<>();
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for (int i = 0; i < blockGroupBlocks; i++) {
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stripeBlocks.add(new LinkedBlockingQueue<LocatedBlock>(blockGroupBlocks));
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for (int i = 0; i < numAllBlocks; i++) {
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stripeBlocks.add(new LinkedBlockingQueue<LocatedBlock>(numAllBlocks));
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try {
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cellBuffers[i] = ByteBuffer.wrap(byteArrayManager.newByteArray(cellSize));
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} catch (InterruptedException ie) {
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@ -103,29 +101,38 @@ private long getBlockGroupSize() {
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}
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}
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encoder = new RSRawEncoder();
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encoder.initialize(blockGroupDataBlocks,
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blockGroupBlocks - blockGroupDataBlocks, cellSize);
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encoder.initialize(numDataBlocks,
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numAllBlocks - numDataBlocks, cellSize);
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streamers = new ArrayList<>(blockGroupBlocks);
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for (short i = 0; i < blockGroupBlocks; i++) {
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List<StripedDataStreamer> s = new ArrayList<>(numAllBlocks);
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for (short i = 0; i < numAllBlocks; i++) {
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StripedDataStreamer streamer = new StripedDataStreamer(stat, null,
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dfsClient, src, progress, checksum, cachingStrategy, byteArrayManager,
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i, stripeBlocks);
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if (favoredNodes != null && favoredNodes.length != 0) {
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streamer.setFavoredNodes(favoredNodes);
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}
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streamers.add(streamer);
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s.add(streamer);
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}
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streamers = Collections.unmodifiableList(s);
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refreshStreamer();
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}
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private void checkConfiguration() {
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if (cellSize % bytesPerChecksum != 0) {
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throw new HadoopIllegalArgumentException("Invalid values: "
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+ DFSConfigKeys.DFS_BYTES_PER_CHECKSUM_KEY + " (=" + bytesPerChecksum
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+ ") must divide cell size (=" + cellSize + ").");
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}
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}
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private void refreshStreamer() {
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streamer = streamers.get(curIdx);
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}
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private void moveToNextStreamer() {
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curIdx = (curIdx + 1) % blockGroupBlocks;
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curIdx = (curIdx + 1) % numAllBlocks;
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refreshStreamer();
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}
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@ -136,20 +143,21 @@ private void moveToNextStreamer() {
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* @param buffers data buffers + parity buffers
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*/
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private void encode(ByteBuffer[] buffers) {
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ByteBuffer[] dataBuffers = new ByteBuffer[blockGroupDataBlocks];
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ByteBuffer[] parityBuffers = new ByteBuffer[blockGroupBlocks - blockGroupDataBlocks];
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for (int i = 0; i < blockGroupBlocks; i++) {
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if (i < blockGroupDataBlocks) {
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ByteBuffer[] dataBuffers = new ByteBuffer[numDataBlocks];
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ByteBuffer[] parityBuffers = new ByteBuffer[numAllBlocks - numDataBlocks];
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for (int i = 0; i < numAllBlocks; i++) {
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if (i < numDataBlocks) {
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dataBuffers[i] = buffers[i];
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} else {
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parityBuffers[i - blockGroupDataBlocks] = buffers[i];
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parityBuffers[i - numDataBlocks] = buffers[i];
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}
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}
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encoder.encode(dataBuffers, parityBuffers);
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}
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/**
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* Generate packets from a given buffer
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* Generate packets from a given buffer. This is only used for streamers
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* writing parity blocks.
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*
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* @param byteBuffer the given buffer to generate packets
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* @return packets generated
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@ -185,7 +193,6 @@ protected synchronized void writeChunk(byte[] b, int offset, int len,
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throw new IOException(msg);
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}
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// If current packet has not been enqueued for transmission,
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// but the cell buffer is full, we need to enqueue the packet
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if (currentPacket != null && getSizeOfCellnBuffer(curIdx) == cellSize) {
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@ -213,13 +220,13 @@ protected synchronized void writeChunk(byte[] b, int offset, int len,
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//When all data cells in a stripe are ready, we need to encode
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//them and generate some parity cells. These cells will be
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//converted to packets and put to their DataStreamer's queue.
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if (curIdx == blockGroupDataBlocks) {
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if (curIdx == numDataBlocks) {
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//encode the data cells
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for (int k = 0; k < blockGroupDataBlocks; k++) {
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for (int k = 0; k < numDataBlocks; k++) {
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cellBuffers[k].flip();
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}
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encode(cellBuffers);
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for (int i = blockGroupDataBlocks; i < blockGroupBlocks; i++) {
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for (int i = numDataBlocks; i < numAllBlocks; i++) {
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ByteBuffer parityBuffer = cellBuffers[i];
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List<DFSPacket> packets = generatePackets(parityBuffer);
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for (DFSPacket p : packets) {
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@ -245,13 +252,24 @@ private int getSizeOfCellnBuffer(int cellIndex) {
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}
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private void clearCellBuffers() {
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for (int i = 0; i< blockGroupBlocks; i++) {
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for (int i = 0; i< numAllBlocks; i++) {
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cellBuffers[i].clear();
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if (i >= numDataBlocks) {
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Arrays.fill(cellBuffers[i].array(), (byte) 0);
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}
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}
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}
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private int stripeDataSize() {
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return blockGroupDataBlocks * cellSize;
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return numDataBlocks * cellSize;
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}
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private long getCurrentBlockGroupBytes() {
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long sum = 0;
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for (int i = 0; i < numDataBlocks; i++) {
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sum += streamers.get(i).getBytesCurBlock();
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}
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return sum;
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}
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private void notSupported(String headMsg)
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@ -270,7 +288,6 @@ public void hsync() throws IOException {
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notSupported("hsync");
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}
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@Override
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protected synchronized void start() {
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for (StripedDataStreamer streamer : streamers) {
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@ -302,15 +319,11 @@ boolean isClosed() {
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// interrupt datastreamer if force is true
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@Override
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protected void closeThreads(boolean force) throws IOException {
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StripedDataStreamer leadingStreamer = null;
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for (StripedDataStreamer streamer : streamers) {
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try {
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streamer.close(force);
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streamer.join();
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streamer.closeSocket();
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if (streamer.isLeadingStreamer()) {
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leadingStreamer = streamer;
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}
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} catch (InterruptedException e) {
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throw new IOException("Failed to shutdown streamer");
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} finally {
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@ -318,40 +331,26 @@ protected void closeThreads(boolean force) throws IOException {
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setClosed();
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}
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}
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assert leadingStreamer != null : "One streamer should be leader";
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leadingStreamer.countTailingBlockGroupBytes();
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}
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@Override
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public synchronized void write(int b) throws IOException {
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super.write(b);
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currentBlockGroupBytes = (currentBlockGroupBytes + 1) % getBlockGroupSize();
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}
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@Override
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public synchronized void write(byte b[], int off, int len)
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throws IOException {
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super.write(b, off, len);
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currentBlockGroupBytes = (currentBlockGroupBytes + len) % getBlockGroupSize();
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}
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private void writeParityCellsForLastStripe() throws IOException{
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private void writeParityCellsForLastStripe() throws IOException {
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final long currentBlockGroupBytes = getCurrentBlockGroupBytes();
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long parityBlkSize = StripedBlockUtil.getInternalBlockLength(
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currentBlockGroupBytes, cellSize, blockGroupDataBlocks,
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blockGroupDataBlocks + 1);
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currentBlockGroupBytes, cellSize, numDataBlocks,
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numDataBlocks + 1);
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if (parityBlkSize == 0 || currentBlockGroupBytes % stripeDataSize() == 0) {
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return;
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}
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int parityCellSize = parityBlkSize % cellSize == 0 ? cellSize :
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(int) (parityBlkSize % cellSize);
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for (int i = 0; i < blockGroupBlocks; i++) {
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for (int i = 0; i < numAllBlocks; i++) {
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long internalBlkLen = StripedBlockUtil.getInternalBlockLength(
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currentBlockGroupBytes, cellSize, blockGroupDataBlocks, i);
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currentBlockGroupBytes, cellSize, numDataBlocks, i);
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// Pad zero bytes to make all cells exactly the size of parityCellSize
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// If internal block is smaller than parity block, pad zero bytes.
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// Also pad zero bytes to all parity cells
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if (internalBlkLen < parityBlkSize || i >= blockGroupDataBlocks) {
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if (internalBlkLen < parityBlkSize || i >= numDataBlocks) {
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int position = cellBuffers[i].position();
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assert position <= parityCellSize : "If an internal block is smaller" +
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" than parity block, then its last cell should be small than last" +
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@ -365,9 +364,9 @@ private void writeParityCellsForLastStripe() throws IOException{
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encode(cellBuffers);
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//write parity cells
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curIdx = blockGroupDataBlocks;
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curIdx = numDataBlocks;
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refreshStreamer();
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for (int i = blockGroupDataBlocks; i < blockGroupBlocks; i++) {
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for (int i = numDataBlocks; i < numAllBlocks; i++) {
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ByteBuffer parityBuffer = cellBuffers[i];
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List<DFSPacket> packets = generatePackets(parityBuffer);
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for (DFSPacket p : packets) {
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@ -385,7 +384,7 @@ private void writeParityCellsForLastStripe() throws IOException{
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@Override
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void setClosed() {
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super.setClosed();
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for (int i = 0; i < blockGroupBlocks; i++) {
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for (int i = 0; i < numAllBlocks; i++) {
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byteArrayManager.release(cellBuffers[i].array());
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streamers.get(i).release();
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}
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@ -395,10 +394,11 @@ void setClosed() {
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protected synchronized void closeImpl() throws IOException {
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if (isClosed()) {
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IOException e = getLeadingStreamer().getLastException().getAndSet(null);
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if (e == null)
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return;
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else
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if (e != null) {
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throw e;
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} else {
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return;
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}
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}
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try {
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@ -408,14 +408,13 @@ protected synchronized void closeImpl() throws IOException {
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streamer.waitAndQueuePacket(currentPacket);
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currentPacket = null;
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}
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//if the last stripe is incomplete, generate and write parity cells
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// if the last stripe is incomplete, generate and write parity cells
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writeParityCellsForLastStripe();
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for (int i = 0; i < blockGroupBlocks; i++) {
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for (int i = 0; i < numAllBlocks; i++) {
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curIdx = i;
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refreshStreamer();
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if (streamer.getBytesCurBlock()!= 0 ||
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currentBlockGroupBytes < getBlockGroupSize()) {
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if (streamer.getBytesCurBlock() > 0) {
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// send an empty packet to mark the end of the block
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currentPacket = createPacket(0, 0, streamer.getBytesCurBlock(),
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streamer.getAndIncCurrentSeqno(), true);
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@ -425,9 +424,8 @@ currentBlockGroupBytes < getBlockGroupSize()) {
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flushInternal();
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}
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// get last block before destroying the streamer
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ExtendedBlock lastBlock = streamers.get(0).getBlock();
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closeThreads(false);
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final ExtendedBlock lastBlock = getCommittedBlock();
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TraceScope scope = Trace.startSpan("completeFile", Sampler.NEVER);
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try {
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completeFile(lastBlock);
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@ -435,10 +433,35 @@ currentBlockGroupBytes < getBlockGroupSize()) {
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scope.close();
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}
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dfsClient.endFileLease(fileId);
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} catch (ClosedChannelException e) {
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} catch (ClosedChannelException ignored) {
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} finally {
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setClosed();
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}
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}
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/**
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* Generate the block which is reported and will be committed in NameNode.
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* Need to go through all the streamers writing data blocks and add their
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* bytesCurBlock together. Note that at this time all streamers have been
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* closed. Also this calculation can cover streamers with writing failures.
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*
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* @return An ExtendedBlock with size of the whole block group.
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*/
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ExtendedBlock getCommittedBlock() throws IOException {
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ExtendedBlock b = getLeadingStreamer().getBlock();
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if (b == null) {
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return null;
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}
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final ExtendedBlock block = new ExtendedBlock(b);
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final boolean atBlockGroupBoundary =
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getLeadingStreamer().getBytesCurBlock() == 0 &&
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getLeadingStreamer().getBlock() != null &&
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getLeadingStreamer().getBlock().getNumBytes() > 0;
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for (int i = 1; i < numDataBlocks; i++) {
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block.setNumBytes(block.getNumBytes() +
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(atBlockGroupBoundary ? streamers.get(i).getBlock().getNumBytes() :
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streamers.get(i).getBytesCurBlock()));
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}
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return block;
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}
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}
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@ -22,7 +22,6 @@
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import org.apache.hadoop.hdfs.protocol.DatanodeInfo;
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import org.apache.hadoop.hdfs.protocol.ExtendedBlock;
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import org.apache.hadoop.hdfs.protocol.HdfsConstants;
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import org.apache.hadoop.hdfs.protocol.HdfsFileStatus;
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import org.apache.hadoop.hdfs.protocol.LocatedBlock;
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import org.apache.hadoop.hdfs.protocol.LocatedStripedBlock;
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@ -37,6 +36,10 @@
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import java.util.concurrent.TimeUnit;
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import java.util.concurrent.atomic.AtomicReference;
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import static org.apache.hadoop.hdfs.protocol.HdfsConstants.BLOCK_STRIPED_CELL_SIZE;
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import static org.apache.hadoop.hdfs.protocol.HdfsConstants.NUM_DATA_BLOCKS;
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import static org.apache.hadoop.hdfs.protocol.HdfsConstants.NUM_PARITY_BLOCKS;
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/****************************************************************************
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* The StripedDataStreamer class is used by {@link DFSStripedOutputStream}.
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* There are two kinds of StripedDataStreamer, leading streamer and ordinary
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@ -47,9 +50,7 @@
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****************************************************************************/
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public class StripedDataStreamer extends DataStreamer {
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private final short index;
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private final List<BlockingQueue<LocatedBlock>> stripedBlocks;
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private static short blockGroupSize = HdfsConstants.NUM_DATA_BLOCKS
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+ HdfsConstants.NUM_PARITY_BLOCKS;
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private final List<BlockingQueue<LocatedBlock>> stripedBlocks;
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private boolean hasCommittedBlock = false;
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StripedDataStreamer(HdfsFileStatus stat, ExtendedBlock block,
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@ -88,66 +89,38 @@ public boolean isLeadingStreamer () {
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}
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private boolean isParityStreamer() {
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return index >= HdfsConstants.NUM_DATA_BLOCKS;
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return index >= NUM_DATA_BLOCKS;
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}
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@Override
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protected void endBlock() {
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if (!isLeadingStreamer() && !isParityStreamer()) {
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//before retrieving a new block, transfer the finished block to
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//leading streamer
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// before retrieving a new block, transfer the finished block to
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// leading streamer
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LocatedBlock finishedBlock = new LocatedBlock(
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new ExtendedBlock(block.getBlockPoolId(), block.getBlockId(),
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block.getNumBytes(),block.getGenerationStamp()), null);
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try{
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block.getNumBytes(), block.getGenerationStamp()), null);
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try {
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boolean offSuccess = stripedBlocks.get(0).offer(finishedBlock, 30,
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TimeUnit.SECONDS);
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}catch (InterruptedException ie) {
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//TODO: Handle InterruptedException (HDFS-7786)
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} catch (InterruptedException ie) {
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// TODO: Handle InterruptedException (HDFS-7786)
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}
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}
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super.endBlock();
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}
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/**
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* This function is called after the streamer is closed.
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*/
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void countTailingBlockGroupBytes () throws IOException {
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if (isLeadingStreamer()) {
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//when committing a block group, leading streamer has to adjust
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// {@link block} including the size of block group
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for (int i = 1; i < HdfsConstants.NUM_DATA_BLOCKS; i++) {
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try {
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LocatedBlock finishedLocatedBlock = stripedBlocks.get(0).poll(30,
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TimeUnit.SECONDS);
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if (finishedLocatedBlock == null) {
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throw new IOException("Fail to get finished LocatedBlock " +
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"from streamer, i=" + i);
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}
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ExtendedBlock finishedBlock = finishedLocatedBlock.getBlock();
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long bytes = finishedBlock == null ? 0 : finishedBlock.getNumBytes();
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if (block != null) {
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block.setNumBytes(block.getNumBytes() + bytes);
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}
|
||||
} catch (InterruptedException ie) {
|
||||
DFSClient.LOG.info("InterruptedException received when " +
|
||||
"putting a block to stripeBlocks, ie = " + ie);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
@Override
|
||||
protected LocatedBlock locateFollowingBlock(DatanodeInfo[] excludedNodes)
|
||||
throws IOException {
|
||||
LocatedBlock lb = null;
|
||||
if (isLeadingStreamer()) {
|
||||
if(hasCommittedBlock) {
|
||||
if (hasCommittedBlock) {
|
||||
/**
|
||||
* when committing a block group, leading streamer has to adjust
|
||||
* {@link block} to include the size of block group
|
||||
*/
|
||||
for (int i = 1; i < HdfsConstants.NUM_DATA_BLOCKS; i++) {
|
||||
for (int i = 1; i < NUM_DATA_BLOCKS; i++) {
|
||||
try {
|
||||
LocatedBlock finishedLocatedBlock = stripedBlocks.get(0).poll(30,
|
||||
TimeUnit.SECONDS);
|
||||
@ -157,7 +130,7 @@ protected LocatedBlock locateFollowingBlock(DatanodeInfo[] excludedNodes)
|
||||
}
|
||||
ExtendedBlock finishedBlock = finishedLocatedBlock.getBlock();
|
||||
long bytes = finishedBlock == null ? 0 : finishedBlock.getNumBytes();
|
||||
if(block != null) {
|
||||
if (block != null) {
|
||||
block.setNumBytes(block.getNumBytes() + bytes);
|
||||
}
|
||||
} catch (InterruptedException ie) {
|
||||
@ -171,14 +144,13 @@ protected LocatedBlock locateFollowingBlock(DatanodeInfo[] excludedNodes)
|
||||
hasCommittedBlock = true;
|
||||
assert lb instanceof LocatedStripedBlock;
|
||||
DFSClient.LOG.debug("Leading streamer obtained bg " + lb);
|
||||
LocatedBlock[] blocks = StripedBlockUtil.
|
||||
parseStripedBlockGroup((LocatedStripedBlock) lb,
|
||||
HdfsConstants.BLOCK_STRIPED_CELL_SIZE, HdfsConstants.NUM_DATA_BLOCKS,
|
||||
HdfsConstants.NUM_PARITY_BLOCKS
|
||||
);
|
||||
assert blocks.length == blockGroupSize :
|
||||
LocatedBlock[] blocks = StripedBlockUtil.parseStripedBlockGroup(
|
||||
(LocatedStripedBlock) lb, BLOCK_STRIPED_CELL_SIZE, NUM_DATA_BLOCKS,
|
||||
NUM_PARITY_BLOCKS);
|
||||
assert blocks.length == (NUM_DATA_BLOCKS + NUM_PARITY_BLOCKS) :
|
||||
"Fail to get block group from namenode: blockGroupSize: " +
|
||||
blockGroupSize + ", blocks.length: " + blocks.length;
|
||||
(NUM_DATA_BLOCKS + NUM_PARITY_BLOCKS) + ", blocks.length: " +
|
||||
blocks.length;
|
||||
lb = blocks[0];
|
||||
for (int i = 1; i < blocks.length; i++) {
|
||||
try {
|
||||
@ -199,7 +171,7 @@ protected LocatedBlock locateFollowingBlock(DatanodeInfo[] excludedNodes)
|
||||
}
|
||||
} else {
|
||||
try {
|
||||
//wait 90 seconds to get a block from the queue
|
||||
// wait 90 seconds to get a block from the queue
|
||||
lb = stripedBlocks.get(index).poll(90, TimeUnit.SECONDS);
|
||||
} catch (InterruptedException ie) {
|
||||
DFSClient.LOG.info("InterruptedException received when retrieving " +
|
||||
|
||||
@ -66,6 +66,7 @@
|
||||
import org.apache.hadoop.hdfs.server.blockmanagement.CorruptReplicasMap.Reason;
|
||||
import org.apache.hadoop.hdfs.server.blockmanagement.DatanodeStorageInfo.AddBlockResult;
|
||||
import org.apache.hadoop.hdfs.server.blockmanagement.PendingDataNodeMessages.ReportedBlockInfo;
|
||||
import org.apache.hadoop.hdfs.server.common.HdfsServerConstants;
|
||||
import org.apache.hadoop.hdfs.server.common.HdfsServerConstants.BlockUCState;
|
||||
import org.apache.hadoop.hdfs.server.common.HdfsServerConstants.ReplicaState;
|
||||
import org.apache.hadoop.hdfs.server.namenode.NameNode;
|
||||
@ -598,8 +599,20 @@ public int getDefaultStorageNum(BlockInfo block) {
|
||||
}
|
||||
|
||||
public short getMinStorageNum(BlockInfo block) {
|
||||
return block.isStriped() ?
|
||||
((BlockInfoStriped) block).getDataBlockNum() : minReplication;
|
||||
if (block.isStriped()) {
|
||||
final BlockInfoStriped sblock = (BlockInfoStriped) block;
|
||||
short dataBlockNum = sblock.getDataBlockNum();
|
||||
if (sblock.isComplete() ||
|
||||
sblock.getBlockUCState() == BlockUCState.COMMITTED) {
|
||||
// if the sblock is committed/completed and its length is less than a
|
||||
// full stripe, the minimum storage number needs to be adjusted
|
||||
dataBlockNum = (short) Math.min(dataBlockNum,
|
||||
(sblock.getNumBytes() - 1) / HdfsConstants.BLOCK_STRIPED_CELL_SIZE + 1);
|
||||
}
|
||||
return dataBlockNum;
|
||||
} else {
|
||||
return minReplication;
|
||||
}
|
||||
}
|
||||
|
||||
public boolean hasMinStorage(BlockInfo block) {
|
||||
|
||||
@ -1,5 +1,6 @@
|
||||
package org.apache.hadoop.hdfs;
|
||||
|
||||
import java.nio.ByteBuffer;
|
||||
import java.util.Arrays;
|
||||
import org.apache.hadoop.conf.Configuration;
|
||||
import org.apache.hadoop.fs.FileStatus;
|
||||
@ -20,6 +21,8 @@
|
||||
import org.apache.hadoop.hdfs.server.datanode.CachingStrategy;
|
||||
import org.apache.hadoop.hdfs.util.StripedBlockUtil;
|
||||
import org.apache.hadoop.io.IOUtils;
|
||||
import org.apache.hadoop.io.erasurecode.rawcoder.RSRawEncoder;
|
||||
import org.apache.hadoop.io.erasurecode.rawcoder.RawErasureEncoder;
|
||||
import org.apache.hadoop.net.NetUtils;
|
||||
import org.apache.hadoop.security.token.Token;
|
||||
import org.junit.After;
|
||||
@ -42,8 +45,8 @@ public class TestDFSStripedOutputStream {
|
||||
private DistributedFileSystem fs;
|
||||
private final int cellSize = HdfsConstants.BLOCK_STRIPED_CELL_SIZE;
|
||||
private final int stripesPerBlock = 4;
|
||||
int blockSize = cellSize * stripesPerBlock;
|
||||
private int mod = 29;
|
||||
private final int blockSize = cellSize * stripesPerBlock;
|
||||
private final RawErasureEncoder encoder = new RSRawEncoder();
|
||||
|
||||
@Before
|
||||
public void setup() throws IOException {
|
||||
@ -53,6 +56,7 @@ public void setup() throws IOException {
|
||||
cluster = new MiniDFSCluster.Builder(conf).numDataNodes(numDNs).build();
|
||||
cluster.getFileSystem().getClient().createErasureCodingZone("/", null);
|
||||
fs = cluster.getFileSystem();
|
||||
encoder.initialize(dataBlocks, parityBlocks, cellSize);
|
||||
}
|
||||
|
||||
@After
|
||||
@ -144,60 +148,27 @@ private byte[] generateBytes(int cnt) {
|
||||
}
|
||||
|
||||
private byte getByte(long pos) {
|
||||
int mod = 29;
|
||||
return (byte) (pos % mod + 1);
|
||||
}
|
||||
|
||||
private void testOneFileUsingDFSStripedInputStream(String src, int writeBytes)
|
||||
throws IOException {
|
||||
Path TestPath = new Path(src);
|
||||
byte[] bytes = generateBytes(writeBytes);
|
||||
DFSTestUtil.writeFile(fs, TestPath, new String(bytes));
|
||||
|
||||
//check file length
|
||||
FileStatus status = fs.getFileStatus(TestPath);
|
||||
long fileLength = status.getLen();
|
||||
if (fileLength != writeBytes) {
|
||||
Assert.fail("File Length error: expect=" + writeBytes
|
||||
+ ", actual=" + fileLength);
|
||||
}
|
||||
|
||||
DFSStripedInputStream dis = new DFSStripedInputStream(
|
||||
fs.getClient(), src, true);
|
||||
byte[] buf = new byte[writeBytes + 100];
|
||||
int readLen = dis.read(0, buf, 0, buf.length);
|
||||
readLen = readLen >= 0 ? readLen : 0;
|
||||
if (readLen != writeBytes) {
|
||||
Assert.fail("The length of file is not correct.");
|
||||
}
|
||||
|
||||
for (int i = 0; i < writeBytes; i++) {
|
||||
if (getByte(i) != buf[i]) {
|
||||
Assert.fail("Byte at i = " + i + " is wrongly written.");
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
private void testOneFile(String src, int writeBytes)
|
||||
throws IOException {
|
||||
Path TestPath = new Path(src);
|
||||
Path testPath = new Path(src);
|
||||
|
||||
int allBlocks = dataBlocks + parityBlocks;
|
||||
byte[] bytes = generateBytes(writeBytes);
|
||||
DFSTestUtil.writeFile(fs, TestPath, new String(bytes));
|
||||
DFSTestUtil.writeFile(fs, testPath, new String(bytes));
|
||||
|
||||
//check file length
|
||||
FileStatus status = fs.getFileStatus(TestPath);
|
||||
// check file length
|
||||
FileStatus status = fs.getFileStatus(testPath);
|
||||
long fileLength = status.getLen();
|
||||
if (fileLength != writeBytes) {
|
||||
Assert.fail("File Length error: expect=" + writeBytes
|
||||
+ ", actual=" + fileLength);
|
||||
}
|
||||
Assert.assertEquals(writeBytes, fileLength);
|
||||
|
||||
List<List<LocatedBlock>> blockGroupList = new ArrayList<>();
|
||||
LocatedBlocks lbs = fs.getClient().getLocatedBlocks(src, 0L);
|
||||
|
||||
for (LocatedBlock firstBlock : lbs.getLocatedBlocks()) {
|
||||
assert firstBlock instanceof LocatedStripedBlock;
|
||||
Assert.assertTrue(firstBlock instanceof LocatedStripedBlock);
|
||||
LocatedBlock[] blocks = StripedBlockUtil.
|
||||
parseStripedBlockGroup((LocatedStripedBlock) firstBlock,
|
||||
cellSize, dataBlocks, parityBlocks);
|
||||
@ -205,15 +176,14 @@ private void testOneFile(String src, int writeBytes)
|
||||
blockGroupList.add(oneGroup);
|
||||
}
|
||||
|
||||
//test each block group
|
||||
// test each block group
|
||||
for (int group = 0; group < blockGroupList.size(); group++) {
|
||||
//get the data of this block
|
||||
List<LocatedBlock> blockList = blockGroupList.get(group);
|
||||
byte[][] dataBlockBytes = new byte[dataBlocks][];
|
||||
byte[][] parityBlockBytes = new byte[allBlocks - dataBlocks][];
|
||||
byte[][] parityBlockBytes = new byte[parityBlocks][];
|
||||
|
||||
|
||||
//for each block, use BlockReader to read data
|
||||
// for each block, use BlockReader to read data
|
||||
for (int i = 0; i < blockList.size(); i++) {
|
||||
LocatedBlock lblock = blockList.get(i);
|
||||
if (lblock == null) {
|
||||
@ -269,19 +239,20 @@ public Peer newConnectedPeer(InetSocketAddress addr,
|
||||
}
|
||||
}).build();
|
||||
|
||||
blockReader.readAll(blockBytes, 0, (int)block.getNumBytes());
|
||||
blockReader.readAll(blockBytes, 0, (int) block.getNumBytes());
|
||||
blockReader.close();
|
||||
}
|
||||
|
||||
//check if we write the data correctly
|
||||
for (int blkIdxInGroup = 0; blkIdxInGroup < dataBlockBytes.length; blkIdxInGroup++) {
|
||||
byte[] actualBlkBytes = dataBlockBytes[blkIdxInGroup];
|
||||
// check if we write the data correctly
|
||||
for (int blkIdxInGroup = 0; blkIdxInGroup < dataBlockBytes.length;
|
||||
blkIdxInGroup++) {
|
||||
final byte[] actualBlkBytes = dataBlockBytes[blkIdxInGroup];
|
||||
if (actualBlkBytes == null) {
|
||||
continue;
|
||||
}
|
||||
for (int posInBlk = 0; posInBlk < actualBlkBytes.length; posInBlk++) {
|
||||
byte expected;
|
||||
//calculate the postion of this byte in the file
|
||||
// calculate the position of this byte in the file
|
||||
long posInFile = StripedBlockUtil.offsetInBlkToOffsetInBG(cellSize,
|
||||
dataBlocks, posInBlk, blkIdxInGroup) +
|
||||
group * blockSize * dataBlocks;
|
||||
@ -291,15 +262,94 @@ public Peer newConnectedPeer(InetSocketAddress addr,
|
||||
expected = getByte(posInFile);
|
||||
}
|
||||
|
||||
if (expected != actualBlkBytes[posInBlk]) {
|
||||
Assert.fail("Unexpected byte " + actualBlkBytes[posInBlk] + ", expect " + expected
|
||||
+ ". Block group index is " + group +
|
||||
", stripe index is " + posInBlk / cellSize +
|
||||
", cell index is " + blkIdxInGroup + ", byte index is " + posInBlk % cellSize);
|
||||
}
|
||||
String s = "Unexpected byte " + actualBlkBytes[posInBlk]
|
||||
+ ", expect " + expected
|
||||
+ ". Block group index is " + group
|
||||
+ ", stripe index is " + posInBlk / cellSize
|
||||
+ ", cell index is " + blkIdxInGroup
|
||||
+ ", byte index is " + posInBlk % cellSize;
|
||||
Assert.assertEquals(s, expected, actualBlkBytes[posInBlk]);
|
||||
}
|
||||
}
|
||||
|
||||
// verify the parity blocks
|
||||
final ByteBuffer[] parityBuffers = new ByteBuffer[parityBlocks];
|
||||
final long groupSize = lbs.getLocatedBlocks().get(group).getBlockSize();
|
||||
int parityBlkSize = (int) StripedBlockUtil.getInternalBlockLength(groupSize,
|
||||
cellSize, dataBlocks, dataBlocks);
|
||||
for (int i = 0; i < parityBlocks; i++) {
|
||||
parityBuffers[i] = ByteBuffer.allocate(parityBlkSize);
|
||||
}
|
||||
final int numStripes = (int) (groupSize - 1) / stripeDataSize() + 1;
|
||||
for (int i = 0; i < numStripes; i++) {
|
||||
final int parityCellSize = i < numStripes - 1 || parityBlkSize % cellSize == 0
|
||||
? cellSize : parityBlkSize % cellSize;
|
||||
ByteBuffer[] stripeBuf = new ByteBuffer[dataBlocks];
|
||||
for (int k = 0; k < stripeBuf.length; k++) {
|
||||
stripeBuf[k] = ByteBuffer.allocate(cellSize);
|
||||
}
|
||||
for (int j = 0; j < dataBlocks; j++) {
|
||||
if (dataBlockBytes[j] != null) {
|
||||
int length = Math.min(cellSize,
|
||||
dataBlockBytes[j].length - cellSize * i);
|
||||
if (length > 0) {
|
||||
stripeBuf[j].put(dataBlockBytes[j], cellSize * i, length);
|
||||
}
|
||||
}
|
||||
final long pos = stripeBuf[j].position();
|
||||
for (int k = 0; k < parityCellSize - pos; k++) {
|
||||
stripeBuf[j].put((byte) 0);
|
||||
}
|
||||
stripeBuf[j].flip();
|
||||
}
|
||||
ByteBuffer[] parityBuf = new ByteBuffer[parityBlocks];
|
||||
for (int j = 0; j < parityBlocks; j++) {
|
||||
parityBuf[j] = ByteBuffer.allocate(cellSize);
|
||||
for (int k = 0; k < parityCellSize; k++) {
|
||||
parityBuf[j].put((byte) 0);
|
||||
}
|
||||
parityBuf[j].flip();
|
||||
}
|
||||
|
||||
encoder.encode(stripeBuf, parityBuf);
|
||||
for (int j = 0; j < parityBlocks; j++) {
|
||||
parityBuffers[j].put(parityBuf[j]);
|
||||
}
|
||||
}
|
||||
|
||||
for (int i = 0; i < parityBlocks; i++) {
|
||||
Assert.assertArrayEquals(parityBuffers[i].array(), parityBlockBytes[i]);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
private void testReadWriteOneFile(String src, int writeBytes)
|
||||
throws IOException {
|
||||
Path TestPath = new Path(src);
|
||||
byte[] bytes = generateBytes(writeBytes);
|
||||
DFSTestUtil.writeFile(fs, TestPath, new String(bytes));
|
||||
|
||||
//check file length
|
||||
FileStatus status = fs.getFileStatus(TestPath);
|
||||
long fileLength = status.getLen();
|
||||
if (fileLength != writeBytes) {
|
||||
Assert.fail("File Length error: expect=" + writeBytes
|
||||
+ ", actual=" + fileLength);
|
||||
}
|
||||
|
||||
DFSStripedInputStream dis = new DFSStripedInputStream(
|
||||
fs.getClient(), src, true);
|
||||
byte[] buf = new byte[writeBytes + 100];
|
||||
int readLen = dis.read(0, buf, 0, buf.length);
|
||||
readLen = readLen >= 0 ? readLen : 0;
|
||||
if (readLen != writeBytes) {
|
||||
Assert.fail("The length of file is not correct.");
|
||||
}
|
||||
|
||||
for (int i = 0; i < writeBytes; i++) {
|
||||
if (getByte(i) != buf[i]) {
|
||||
Assert.fail("Byte at i = " + i + " is wrongly written.");
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user