Package org.apache.hadoop.hdfs.server.common

Interface Summary
HdfsConstants Some handy internal HDFS constants
Storage.StorageDirType An interface to denote storage directory type Implementations can define a type for storage directory by implementing this interface.
Upgradeable Common interface for distributed upgrade objects.
 

Class Summary
GenerationStamp A GenerationStamp is a Hadoop FS primitive, identified by a long.
JspHelper  
Storage Storage information file.
StorageInfo Common class for storage information.
UpgradeManager Generic upgrade manager.
UpgradeObject Abstract upgrade object.
UpgradeObjectCollection Collection of upgrade objects.
UpgradeStatusReport Base upgrade upgradeStatus class.
Util  
 

Enum Summary
HdfsConstants.BlockUCState States, which a block can go through while it is under construction.
HdfsConstants.NamenodeRole Defines the NameNode role.
HdfsConstants.NodeType Type of the node
HdfsConstants.ReplicaState Block replica states, which it can go through while being constructed.
HdfsConstants.StartupOption Startup options
Storage.StorageState  
 

Exception Summary
InconsistentFSStateException The exception is thrown when file system state is inconsistent and is not recoverable.
IncorrectVersionException The exception is thrown when external version does not match current version of the application.
 



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