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