Package org.apache.hadoop.hdfs.server.blockmanagement

Interface Summary

Interface	Description
BlockStatsMXBean	This is an interface used to retrieve statistic information related to block management.
DatanodeStatistics	Datanode statistics

Class Summary

Class	Description
AvailableSpaceBlockPlacementPolicy	Space balanced block placement policy.
BlockIdManager	BlockIdManager allocates the generation stamps and the block ID.
BlockManagerFaultInjector	Used to inject certain faults for testing.
BlockPlacementPolicyWithNodeGroup	The class is responsible for choosing the desired number of targets for placing block replicas on environment with node-group layer.
BlockPlacementStatusDefault
BlockStoragePolicySuite	A collection of block storage policies.
BlockUnderConstructionFeature	Represents the under construction feature of a Block.
CombinedHostFileManager	This class manages datanode configuration using a json file.
DatanodeDescriptor.CachedBlocksList	A list of CachedBlock objects on this datanode.
DatanodeStorageInfo	A Datanode has one or more storages.
HostFileManager	This class manages the include and exclude files for HDFS.
HostSet	The HostSet allows efficient queries on matching wildcard addresses.
NumberReplicas	A immutable object that stores the number of live replicas and the number of decommissioned Replicas.

Enum Summary

Enum	Description
CorruptReplicasMap.Reason	The corruption reason code
DatanodeDescriptor.CachedBlocksList.Type

Exception Summary

Exception	Description
UnresolvedTopologyException	This exception is thrown if resolving topology path for a node fails.