Interface | Description |
---|---|
ClientDatanodeProtocol |
An client-datanode protocol for block recovery
|
ClientProtocol |
ClientProtocol is used by user code via
DistributedFileSystem class to communicate
with the NameNode. |
Class | Description |
---|---|
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[].
|
BlockLocalPathInfo |
A block and the full path information to the block data file and
the metadata file stored on the local file system.
|
CorruptFileBlocks |
Contains a list of paths corresponding to corrupt files and a cookie
used for iterative calls to NameNode.listCorruptFileBlocks.
|
DatanodeID |
This class represents the primary identifier for a Datanode.
|
DatanodeInfo |
This class extends the primary identifier of a Datanode with ephemeral
state, eg usage information, current administrative state, and the
network location that is communicated to clients.
|
DirectoryListing |
This class defines a partial listing of a directory to support
iterative directory listing.
|
ExtendedBlock |
Identifies a Block uniquely across the block pools
|
FSConstants | Deprecated
Please use
HdfsConstants . |
HdfsBlocksMetadata |
Augments an array of blocks on a datanode with additional information about
where the block is stored.
|
HdfsConstants |
Some handy constants
|
HdfsFileStatus |
Interface that represents the over the wire information for a file.
|
HdfsLocatedFileStatus |
Interface that represents the over the wire information
including block locations for a file.
|
LayoutVersion |
This class tracks changes in the layout version of HDFS.
|
LocatedBlock |
Associates a block with the Datanodes that contain its replicas
and other block metadata (E.g.
|
LocatedBlocks |
Collection of blocks with their locations and the file length.
|
SnapshotDiffReport |
This class represents to end users the difference between two snapshots of
the same directory, or the difference between a snapshot of the directory and
its current state.
|
SnapshotDiffReport.DiffReportEntry |
Representing the full path and diff type of a file/directory where changes
have happened.
|
SnapshotInfo |
SnapshotInfo maintains information for a snapshot
|
SnapshottableDirectoryStatus |
Metadata about a snapshottable directory
|
Enum | Description |
---|---|
DatanodeInfo.AdminStates | |
HdfsConstants.DatanodeReportType | |
HdfsConstants.SafeModeAction | |
LayoutVersion.Feature |
Enums for features that change the layout version.
|
SnapshotDiffReport.DiffType |
Types of the difference, which include CREATE, MODIFY, DELETE, and RENAME.
|
Exception | Description |
---|---|
AlreadyBeingCreatedException |
The exception that happens when you ask to create a file that already
is being created, but is not closed yet.
|
DSQuotaExceededException | |
FSLimitException | |
FSLimitException.MaxDirectoryItemsExceededException |
Directory has too many items
|
FSLimitException.PathComponentTooLongException |
Path component length is too long
|
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.
|
SnapshotAccessControlException |
Snapshot access related exception.
|
SnapshotException |
Snapshot related exception.
|
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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