Examples of org.apache.hadoop.dfs.BlockCommand

org.apache.hadoop.dfs.BlockCommand
A BlockCommand is an instruction to a datanode regarding some blocks under its control. It tells the DataNode to either invalidate a set of indicated blocks, or to copy a set of indicated blocks to another DataNode. @author Mike Cafarella

    switch(cmd.getAction()) {
    case DatanodeProtocol.DNA_TRANSFER:
      //
      // Send a copy of a block to another datanode
      //
      BlockCommand bcmd = (BlockCommand)cmd;
      transferBlocks(bcmd.getBlocks(), bcmd.getTargets());
      break;
    case DatanodeProtocol.DNA_INVALIDATE:
      //
      // Some local block(s) are obsolete and can be 
      // safely garbage-collected.

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Related Classes of org.apache.hadoop.dfs.BlockCommand

org.apache.hadoop.dfs.DataNode

org.apache.hadoop.dfs.DatanodeDescriptor.BlockTargetPair

org.apache.hadoop.dfs.TestDatanodeDescriptor

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