类 org.apache.hadoop.hdfs.server.protocol.UpgradeCommand
的使用

使用UpgradeCommand的程序包

程序包	说明
org.apache.hadoop.hdfs.server.common
org.apache.hadoop.hdfs.server.datanode
org.apache.hadoop.hdfs.server.namenode
org.apache.hadoop.hdfs.server.protocol

org.apache.hadoop.hdfs.server.common中UpgradeCommand的使用

声明为UpgradeCommand的org.apache.hadoop.hdfs.server.common中的字段

限定符和类型	字段和说明
protected UpgradeCommand	UpgradeManager.broadcastCommand

返回UpgradeCommand的org.apache.hadoop.hdfs.server.common中的方法

限定符和类型	方法和说明
UpgradeCommand	Upgradeable.completeUpgrade() Complete upgrade.
UpgradeCommand	UpgradeManager.getBroadcastCommand()
UpgradeCommand	Upgradeable.startUpgrade() Prepare for the upgrade.

org.apache.hadoop.hdfs.server.datanode中UpgradeCommand的使用

返回UpgradeCommand的org.apache.hadoop.hdfs.server.datanode中的方法

限定符和类型	方法和说明
UpgradeCommand	UpgradeObjectDatanode.completeUpgrade() Complete upgrade and return a status complete command for broadcasting.

org.apache.hadoop.hdfs.server.namenode中UpgradeCommand的使用

返回UpgradeCommand的org.apache.hadoop.hdfs.server.namenode中的方法

限定符和类型	方法和说明
abstract UpgradeCommand	UpgradeObjectNamenode.processUpgradeCommand(UpgradeCommand command) Process an upgrade command.
UpgradeCommand	NameNode.processUpgradeCommand(UpgradeCommand comm)
UpgradeCommand	UpgradeObjectNamenode.startUpgrade()

参数类型为UpgradeCommand的org.apache.hadoop.hdfs.server.namenode中的方法

限定符和类型	方法和说明
abstract UpgradeCommand	UpgradeObjectNamenode.processUpgradeCommand(UpgradeCommand command) Process an upgrade command.
UpgradeCommand	NameNode.processUpgradeCommand(UpgradeCommand comm)

org.apache.hadoop.hdfs.server.protocol中UpgradeCommand的使用

返回UpgradeCommand的org.apache.hadoop.hdfs.server.protocol中的方法

限定符和类型	方法和说明
UpgradeCommand	DatanodeProtocol.processUpgradeCommand(UpgradeCommand comm) This is a very general way to send a command to the name-node during distributed upgrade process.

参数类型为UpgradeCommand的org.apache.hadoop.hdfs.server.protocol中的方法

限定符和类型	方法和说明
UpgradeCommand	DatanodeProtocol.processUpgradeCommand(UpgradeCommand comm) This is a very general way to send a command to the name-node during distributed upgrade process.