Examples of org.apache.hadoop.hdfs.protocol.CopyBlockHeader

org.apache.hadoop.hdfs.protocol.CopyBlockHeader
The header for the OP_COPY_BLOCK datanode operation.

   */
  private void copyBlock(DataInputStream in,
      VersionAndOpcode versionAndOpcode) throws IOException {
    
    // Read in the header
    CopyBlockHeader copyBlockHeader = new CopyBlockHeader(versionAndOpcode);
    copyBlockHeader.readFields(in);
    long startTime = System.currentTimeMillis();
    int namespaceId = copyBlockHeader.getNamespaceId();
    long blockId = copyBlockHeader.getBlockId();
    long genStamp = copyBlockHeader.getGenStamp();
    Block block = new Block(blockId, 0, genStamp);


    if (!dataXceiverServer.balanceThrottler.acquire()) { // not able to start
      LOG.info("Not able to copy block " + blockId + " to " 
          + s.getRemoteSocketAddress() + " because threads quota is exceeded.");

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          datanode.socketWriteTimeout);
      proxyOut = new DataOutputStream(
                     new BufferedOutputStream(baseStream, SMALL_BUFFER_SIZE));


      /* send request to the proxy */
      CopyBlockHeader copyBlockHeader = new CopyBlockHeader(
          DataTransferProtocol.DATA_TRANSFER_VERSION, namespaceId,
          block.getBlockId(), block.getGenerationStamp());
      copyBlockHeader.writeVersionAndOpCode(proxyOut);
      copyBlockHeader.write(proxyOut);
      proxyOut.flush();


      // receive the response from the proxy
      proxyReply = new DataInputStream(new BufferedInputStream(
          NetUtils.getInputStream(proxySock), BUFFER_SIZE));

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   */
  private void copyBlock(DataInputStream in,
      VersionAndOpcode versionAndOpcode) throws IOException {
    
    // Read in the header
    CopyBlockHeader copyBlockHeader = new CopyBlockHeader(versionAndOpcode);
    copyBlockHeader.readFields(in);
    long startTime = System.currentTimeMillis();
    int namespaceId = copyBlockHeader.getNamespaceId();
    long blockId = copyBlockHeader.getBlockId();
    long genStamp = copyBlockHeader.getGenStamp();
    Block block = new Block(blockId, 0, genStamp);


    if (!dataXceiverServer.balanceThrottler.acquire()) { // not able to start
      LOG.info("Not able to copy block " + blockId + " to " 
          + s.getRemoteSocketAddress() + " because threads quota is exceeded.");

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          datanode.socketWriteTimeout);
      proxyOut = new DataOutputStream(
                     new BufferedOutputStream(baseStream, SMALL_BUFFER_SIZE));


      /* send request to the proxy */
      CopyBlockHeader copyBlockHeader = new CopyBlockHeader(
          DataTransferProtocol.DATA_TRANSFER_VERSION, namespaceId,
          block.getBlockId(), block.getGenerationStamp());
      copyBlockHeader.writeVersionAndOpCode(proxyOut);
      copyBlockHeader.write(proxyOut);
      proxyOut.flush();


      // receive the response from the proxy
      proxyReply = new DataInputStream(new BufferedInputStream(
          NetUtils.getInputStream(proxySock), BUFFER_SIZE));

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Related Classes of org.apache.hadoop.hdfs.protocol.CopyBlockHeader

org.apache.hadoop.hdfs.server.datanode.DataXceiver

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