Uses of Class
org.apache.hadoop.hdfs.server.protocol.DatanodeCommand

Packages that use DatanodeCommand
org.apache.hadoop.hdfs.server.namenode   
org.apache.hadoop.hdfs.server.protocol   
 

Uses of DatanodeCommand in org.apache.hadoop.hdfs.server.namenode
 

Methods in org.apache.hadoop.hdfs.server.namenode that return DatanodeCommand
 DatanodeCommand NameNode.blockReport(DatanodeRegistration nodeReg, long[] blocks)
           
 DatanodeCommand[] NameNode.sendHeartbeat(DatanodeRegistration nodeReg, long capacity, long dfsUsed, long remaining, int xmitsInProgress, int xceiverCount)
          Data node notify the name node that it is alive Return an array of block-oriented commands for the datanode to execute.
 

Uses of DatanodeCommand in org.apache.hadoop.hdfs.server.protocol
 

Subclasses of DatanodeCommand in org.apache.hadoop.hdfs.server.protocol
 class BlockCommand
          A BlockCommand is an instruction to a datanode regarding some blocks under its control.
 class BlockRecoveryCommand
          BlockRecoveryCommand is an instruction to a data-node to recover the specified blocks.
 class KeyUpdateCommand
           
 class UpgradeCommand
          This as a generic distributed upgrade command.
 

Fields in org.apache.hadoop.hdfs.server.protocol declared as DatanodeCommand
static DatanodeCommand DatanodeCommand.FINALIZE
           
static DatanodeCommand DatanodeCommand.REGISTER
           
 

Methods in org.apache.hadoop.hdfs.server.protocol that return DatanodeCommand
 DatanodeCommand DatanodeProtocol.blockReport(DatanodeRegistration registration, long[] blocks)
          blockReport() tells the NameNode about all the locally-stored blocks.
 DatanodeCommand[] DatanodeProtocol.sendHeartbeat(DatanodeRegistration registration, long capacity, long dfsUsed, long remaining, int xmitsInProgress, int xceiverCount)
          sendHeartbeat() tells the NameNode that the DataNode is still alive and well.
 



Copyright © 2009 The Apache Software Foundation