Package org.apache.hadoop.hdfs.server.datanode

Interface Summary

Interface	Description
DataNodeMXBean	This is the JMX management interface for data node information
ReplicaInPipelineInterface	This defines the interface of a replica in Pipeline that's being written to
ShortCircuitRegistry.Visitor

Class Summary

Class	Description
browseBlock_jsp
browseDirectory_jsp
CachingStrategy	The caching strategy we should use for an HDFS read or write operation.
CachingStrategy.Builder
dataNodeHome_jsp
FinalizedReplica	This class describes a replica that has been finalized.
ReplicaBeingWritten	This class represents replicas being written.
ReplicaInfo.ReplicaDirInfo
ReplicaInPipeline	This class defines a replica in a pipeline, which includes a persistent replica being written to by a dfs client or a temporary replica being replicated by a source datanode or being copied for the balancing purpose.
ReplicaUnderRecovery	This class represents replicas that are under block recovery It has a recovery id that is equal to the generation stamp that the replica will be bumped to after recovery The recovery id is used to handle multiple concurrent block recoveries.
ReplicaWaitingToBeRecovered	This class represents a replica that is waiting to be recovered.
SecureDataNodeStarter	Utility class to start a datanode in a secure cluster, first obtaining privileged resources before main startup and handing them to the datanode.
SecureDataNodeStarter.SecureResources	Stash necessary resources needed for datanode operation in a secure env.
ShortCircuitRegistry
ShortCircuitRegistry.NewShmInfo
ShortCircuitRegistry.RegisteredShm
tail_jsp

Enum Summary

Enum	Description
DataNodeLayoutVersion.Feature	Enums for features that change the layout version.

Exception Summary

Exception	Description
ReplicaAlreadyExistsException	Exception indicating that the target block already exists and is not set to be recovered/overwritten.
ReplicaNotFoundException	Exception indicating that DataNode does not have a replica that matches the target block.
UnexpectedReplicaStateException	Exception indicating that the replica is in an unexpected state