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

Interface Summary
FSDatasetInterface This is an interface for the underlying storage that stores blocks for a data node.
Replica This represents block replicas which stored in DataNode.
 

Class Summary
DataNode DataNode is a class (and program) that stores a set of blocks for a DFS deployment.
DatanodeJspHelper  
DataStorage Data storage information file.
DirectoryScanner Periodically scans the data directories for block and block metadata files.
FSDataset FSDataset manages a set of data blocks.
FSDatasetInterface.BlockInputStreams This class contains the input streams for the data and checksum of a block
FSDatasetInterface.BlockWriteStreams This class contains the output streams for the data and checksum of a block
FSDatasetInterface.MetaDataInputStream This class provides the input stream and length of the metadata of a block
ReplicaInfo This class is used by datanodes to maintain meta data of its replicas.
UpgradeObjectDatanode Base class for data-node upgrade objects.
 

Exception Summary
ReplicaNotFoundException Exception indicating that DataNode does not have a replica that matches the target block.
 



Copyright © 2009 The Apache Software Foundation