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

Interface Summary

Interface	Description
FsVolumeReference	This holds volume reference count as AutoClosable resource.
FsVolumeSpi	This is an interface for the underlying volume.
FsVolumeSpi.BlockIterator	BlockIterator will return ExtendedBlock entries from a block pool in this volume.

Class Summary

Class	Description
AvailableSpaceVolumeChoosingPolicy<V extends FsVolumeSpi>	A DN volume choosing policy which takes into account the amount of free space on each of the available volumes when considering where to assign a new replica allocation.
FsDatasetSpi.Factory<D extends org.apache.hadoop.hdfs.server.datanode.fsdataset.FsDatasetSpi<?>>	A factory for creating FsDatasetSpi objects.
FsDatasetSpi.FsVolumeReferences	It behaviors as an unmodifiable list of FsVolume.
FsVolumeSpi.VolumeCheckContext	Context for the Checkable.check(K) call.
LengthInputStream	An input stream with length.
ReplicaInputStreams	Contains the input streams for the data and checksum of a replica.
ReplicaOutputStreams	Contains the output streams for the data and checksum of a replica.
RoundRobinVolumeChoosingPolicy<V extends FsVolumeSpi>	Choose volumes with the same storage type in round-robin order.