Examples of DataNode

com.cxy.redisclient.domain.DataNode
org.apache.cayenne.access.DataNode
An abstraction of a single physical data storage. This is usually a database server, but can potentially be some other storage type like an LDAP server, etc.
org.apache.hadoop.dfs.DataNode
DataNode is a class (and program) that stores a set of blocks for a DFS deployment. A single deployment can have one or many DataNodes. Each DataNode communicates regularly with a single NameNode. It also communicates with client code and other DataNodes from time to time. DataNodes store a series of named blocks. The DataNode allows client code to read these blocks, or to write new block data. The DataNode may also, in response to instructions from its NameNode, delete blocks or copy blocks to/from other DataNodes. The DataNode maintains just one critical table: block-> stream of bytes (of BLOCK_SIZE or less) This info is stored on a local disk. The DataNode reports the table's contents to the NameNode upon startup and every so often afterwards. DataNodes spend their lives in an endless loop of asking the NameNode for something to do. A NameNode cannot connect to a DataNode directly; a NameNode simply returns values from functions invoked by a DataNode. DataNodes maintain an open server socket so that client code or other DataNodes can read/write data. The host/port for this server is reported to the NameNode, which then sends that information to clients or other DataNodes that might be interested.
org.apache.hadoop.hdfs.server.datanode.DataNode
DataNode is a class (and program) that stores a set of blocks for a DFS deployment. A single deployment can have one or many DataNodes. Each DataNode communicates regularly with a single NameNode. It also communicates with client code and other DataNodes from time to time. DataNodes store a series of named blocks. The DataNode allows client code to read these blocks, or to write new block data. The DataNode may also, in response to instructions from its NameNode, delete blocks or copy blocks to/from other DataNodes. The DataNode maintains just one critical table: block-> stream of bytes (of BLOCK_SIZE or less) This info is stored on a local disk. The DataNode reports the table's contents to the NameNode upon startup and every so often afterwards. DataNodes spend their lives in an endless loop of asking the NameNode for something to do. A NameNode cannot connect to a DataNode directly; a NameNode simply returns values from functions invoked by a DataNode. DataNodes maintain an open server socket so that client code or other DataNodes can read/write data. The host/port for this server is reported to the NameNode, which then sends that information to clients or other DataNodes that might be interested.
org.apache.zookeeper.server.DataNode
This class contains the data for a node in the data tree.
A data node contains a reference to its parent, a byte array as its data, an array of ACLs, a stat object, and a set of its children's paths.
org.apache.zookeeper_voltpatches.server.DataNode
This class contains the data for a node in the data tree.
A data node contains a reference to its parent, a byte array as its data, an array of ACLs, a stat object, and a set of its children's paths.

org.chaidb.db.index.btree.DataNode

Each data node has the following format:

 Size  Description 4    Key Size 4    Data Size 1    Flags: 0x01 for overflow data, 0x02 for overflow key 2    Space allocated for this node within the page n    Key/Data

org.jboss.cache.DataNode
Represents a DataNode in the cache. @author Manik Surtani (manik@jboss.org)
org.jsoup.nodes.DataNode
A data node, for contents of style, script tags etc, where contents should not show in text(). @author Jonathan Hedley, jonathan@hedley.net
org.openide.loaders.DataNode
org.pentaho.platform.api.repository2.unified.data.node.DataNode

Examples of org.apache.hadoop.hdfs.server.datanode.DataNode

    ((DFSOutputStream) out.getWrappedStream()).abort();


    LocatedBlocks locations = cluster.getNameNodeRpc().getBlockLocations(
        file.toString(), 0, count);
    ExtendedBlock block = locations.get(0).getBlock();
    DataNode dn = cluster.getDataNodes().get(0);
    BlockLocalPathInfo localPathInfo = dn.getBlockLocalPathInfo(block, null);
    File metafile = new File(localPathInfo.getMetaPath());
    assertTrue(metafile.exists());


    // reduce the block meta file size
    RandomAccessFile raf = new RandomAccessFile(metafile, "rw");

View Full Code Here

Examples of org.apache.hadoop.hdfs.server.datanode.DataNode

    List<File> files = new ArrayList<File>();
    List<DataNode> datanodes = cluster.getDataNodes();
    String poolId = cluster.getNamesystem().getBlockPoolId();
    Iterable<Block>[] blocks = cluster.getAllBlockReports(poolId);
    for(int i = 0; i < blocks.length; i++) {
      DataNode dn = datanodes.get(i);
      for(Block b : blocks[i]) {
        files.add(DataNodeTestUtils.getFile(dn, poolId, b.getBlockId()));
      }        
    }
    return files;

View Full Code Here

Examples of org.apache.hadoop.hdfs.server.datanode.DataNode

      final String path = ServletUtil.getDecodedPath(request, "/getFileChecksum");
      final XMLOutputter xml = new XMLOutputter(out, "UTF-8");
      xml.declaration();


      final ServletContext context = getServletContext();
      final DataNode datanode = (DataNode) context.getAttribute("datanode");
      final Configuration conf = 
        new HdfsConfiguration(datanode.getConf());
      final int socketTimeout = conf.getInt(
          DFSConfigKeys.DFS_CLIENT_SOCKET_TIMEOUT_KEY,
          HdfsServerConstants.READ_TIMEOUT);
      final SocketFactory socketFactory = NetUtils.getSocketFactory(conf,
          ClientProtocol.class);

View Full Code Here

Examples of org.apache.hadoop.hdfs.server.datanode.DataNode

    final Block blk = lb.getBlock();
    assertEquals(len1, lb.getBlockSize());


    DatanodeInfo[] datanodeinfos = lb.getLocations();
    assertEquals(repl, datanodeinfos.length);
    final DataNode dn = cluster.getDataNode(datanodeinfos[0].getIpcPort());
    final FSDataset data = (FSDataset)dn.getFSDataset();
    final RandomAccessFile raf = new RandomAccessFile(data.getBlockFile(blk), "rw");
    AppendTestUtil.LOG.info("dn=" + dn + ", blk=" + blk + " (length=" + blk.getNumBytes() + ")");
    assertEquals(len1, raf.length());
    raf.setLength(0);
    raf.close();

View Full Code Here

Examples of org.apache.hadoop.hdfs.server.datanode.DataNode

      final long size = lb.getBlockSize();
      if (i < numblock - 1) {
        assertEquals(BLOCK_SIZE, size);
      }
      for(DatanodeInfo datanodeinfo : lb.getLocations()) {
        final DataNode dn = cluster.getDataNode(datanodeinfo.getIpcPort());
        final BlockMetaDataInfo metainfo = dn.getBlockMetaDataInfo(blk);
        assertEquals(size, metainfo.getNumBytes());
      }
    }
  }

View Full Code Here

Examples of org.apache.hadoop.hdfs.server.datanode.DataNode

      }
      Configuration newconf = new Configuration(dnConf); // save config
      if (hosts != null) {
        NetUtils.addStaticResolution(hosts[i - curDatanodesNum], "localhost");
      }
      DataNode dn = DataNode.instantiateDataNode(dnArgs, dnConf);
      //since the HDFS does things based on IP:port, we need to add the mapping
      //for IP:port to rackId
      String ipAddr = dn.getSelfAddr().getAddress().getHostAddress();
      if (racks != null) {
        int port = dn.getSelfAddr().getPort();
        System.out.println("Adding node with IP:port : " + ipAddr + ":" + port+
                            " to rack " + racks[i-curDatanodesNum]);
        StaticMapping.addNodeToRack(ipAddr + ":" + port,
                                  racks[i-curDatanodesNum]);
      }

View Full Code Here

Examples of org.apache.hadoop.hdfs.server.datanode.DataNode

   * Gets a list of the started DataNodes.  May be empty.
   */
  public ArrayList<DataNode> getDataNodes() {
    ArrayList<DataNode> list = new ArrayList<DataNode>();
    for (int i = 0; i < dataNodes.size(); i++) {
      DataNode node = dataNodes.get(i).datanode;
      list.add(node);
    }
    return list;
  }

View Full Code Here

Examples of org.apache.hadoop.hdfs.server.datanode.DataNode

   * is left running so that new DataNodes may be started.
   */
  public void shutdownDataNodes() {
    for (int i = dataNodes.size()-1; i >= 0; i--) {
      System.out.println("Shutting down DataNode " + i);
      DataNode dn = dataNodes.remove(i).datanode;
      dn.shutdown();
      numDataNodes--;
    }
  }

View Full Code Here

Examples of org.apache.hadoop.hdfs.server.datanode.DataNode

  DataNodeProperties stopDataNode(int i) {
    if (i < 0 || i >= dataNodes.size()) {
      return null;
    }
    DataNodeProperties dnprop = dataNodes.remove(i);
    DataNode dn = dnprop.datanode;
    System.out.println("MiniDFSCluster Stopping DataNode " + 
                       dn.dnRegistration.getName() +
                       " from a total of " + (dataNodes.size() + 1) + 
                       " datanodes.");
    dn.shutdown();
    numDataNodes--;
    return dnprop;
  }

View Full Code Here

Examples of org.apache.zookeeper.server.DataNode

    queue.add(new Pair(startPath, startId));
    while (!queue.isEmpty())
    {
      Pair pair = queue.removeFirst();
      String path = pair._path;
      DataNode head = dt.getNode(path);
      Stat stat = new Stat();
      byte[] data = null;
      try
      {
        data = dt.getData(path, stat, null);
      } catch (NoNodeException e)
      {
        e.printStackTrace();
      }
      // print the node
      format(startId, pair, head, data);
      Set<String> children = head.getChildren();
      if (children != null)
      {
        for (String child : children)
        {
          String childPath;

View Full Code Here

0 1 2 3 4 5

TOP

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.