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Interface Summary | |
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ClientDatanodeProtocol | An client-datanode protocol for block recovery |
ClientProtocol | ClientProtocol is used by user code via
DistributedFileSystem class to communicate
with the NameNode. |
DataTransferProtocol | Transfer data to/from datanode using a streaming protocol. |
FSConstants | Some handy constants |
Class Summary | |
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Block | A Block is a Hadoop FS primitive, identified by a long. |
BlockListAsLongs | This class provides an interface for accessing list of blocks that has been implemented as long[]. |
DatanodeID | DatanodeID is composed of the data node name (hostname:portNumber) and the data storage ID, which it currently represents. |
DatanodeInfo | DatanodeInfo represents the status of a DataNode. |
DataTransferProtocol.PipelineAck | reply |
DataTransferProtocol.Receiver | Receiver |
DataTransferProtocol.Sender | Sender |
DirectoryListing | This class defines a partial listing of a directory to support iterative directory listing. |
HdfsFileStatus | Interface that represents the over the wire information for a file. |
LocatedBlock | A LocatedBlock is a pair of Block, DatanodeInfo[] objects. |
LocatedBlocks | Collection of blocks with their locations and the file length. |
Enum Summary | |
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DatanodeInfo.AdminStates | |
DataTransferProtocol.BlockConstructionStage | |
DataTransferProtocol.Op | Operation |
DataTransferProtocol.Status | Status |
FSConstants.DatanodeReportType | |
FSConstants.SafeModeAction | |
FSConstants.UpgradeAction | Distributed upgrade actions: 1. |
Exception Summary | |
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AlreadyBeingCreatedException | The exception that happens when you ask to create a file that already is being created, but is not closed yet. |
DSQuotaExceededException | |
NSQuotaExceededException | |
QuotaExceededException | This exception is thrown when modification to HDFS results in violation of a directory quota. |
RecoveryInProgressException | Exception indicating that a replica is already being recovery. |
UnregisteredNodeException | This exception is thrown when a node that has not previously registered is trying to access the name node. |
UnresolvedPathException | Thrown when a symbolic link is encountered in a path. |
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