Examples of DatanodeDescriptor

org.apache.cayenne.configuration.DataNodeDescriptor
A descriptor of {@link DataNode} configuration. @since 3.1
org.apache.hadoop.dfs.DatanodeDescriptor
DatanodeDescriptor tracks stats on a given DataNode, such as available storage capacity, last update time, etc., and maintains a set of blocks stored on the datanode. This data structure is a data structure that is internal to the namenode. It is *not* sent over-the-wire to the Client or the Datnodes. Neither is it stored persistently in the fsImage. @author Mike Cafarella @author Konstantin Shvachko
org.apache.hadoop.hdfs.server.blockmanagement.DatanodeDescriptor
This class extends the DatanodeInfo class with ephemeral information (eg health, capacity, what blocks are associated with the Datanode) that is private to the Namenode, ie this class is not exposed to clients.
org.apache.hadoop.hdfs.server.namenode.DatanodeDescriptor
DatanodeDescriptor tracks stats on a given DataNode, such as available storage capacity, last update time, etc., and maintains a set of blocks stored on the datanode. This data structure is a data structure that is internal to the namenode. It is *not* sent over-the-wire to the Client or the Datnodes. Neither is it stored persistently in the fsImage.

Examples of org.apache.hadoop.hdfs.server.namenode.DatanodeDescriptor

  private long[] createRandomFileDispersed(Path file, int numBlocks,
               DatanodeDescriptor primaryNode, DatanodeDescriptor altNode) 
      throws IOException, InterruptedException {
    
    BlockPlacementPolicyFakeData bp = BlockPlacementPolicyFakeData.lastInstance;
    DatanodeDescriptor tmp = bp.overridingDatanode;
    
    final int repl = 1;
    long[] crcs = new long[numBlocks];
    CRC32 crc = new CRC32();
    Random rand = new Random();

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