AbstractFileSystem for hdfs
over rpc and hdfs over web.参照先: 説明
| インタフェース | 説明 |
|---|---|
| BlockStoragePolicySpi |
A storage policy specifies the placement of block replicas on specific
storage types.
|
| ByteBufferReadable |
Implementers of this interface provide a read API that writes to a
ByteBuffer, not a byte[].
|
| CanSetDropBehind | |
| CanSetReadahead | |
| CanUnbuffer |
FSDataInputStreams implement this interface to indicate that they can clear
their buffers on request.
|
| FsConstants |
FileSystem related constants.
|
| PathFilter | |
| PositionedReadable |
Stream that permits positional reading.
|
| Seekable |
Stream that permits seeking.
|
| Syncable |
This interface for flush/sync operation.
|
| クラス | 説明 |
|---|---|
| AbstractFileSystem |
This class provides an interface for implementors of a Hadoop file system
(analogous to the VFS of Unix).
|
| AvroFSInput |
Adapts an
FSDataInputStream to Avro's SeekableInput interface. |
| BlockLocation |
Represents the network location of a block, information about the hosts
that contain block replicas, and other block metadata (E.g. the file
offset associated with the block, length, whether it is corrupt, etc).
|
| ChecksumFileSystem |
Abstract Checksumed FileSystem.
|
| CommonConfigurationKeysPublic |
This class contains constants for configuration keys used
in the common code.
|
| ContentSummary |
Store the summary of a content (a directory or a file).
|
| FileChecksum |
An abstract class representing file checksums for files.
|
| FileContext |
The FileContext class provides an interface for users of the Hadoop
file system.
|
| FileStatus |
Interface that represents the client side information for a file.
|
| FileSystem |
An abstract base class for a fairly generic filesystem.
|
| FileUtil |
A collection of file-processing util methods
|
| FilterFileSystem |
A
FilterFileSystem contains
some other file system, which it uses as
its basic file system, possibly transforming
the data along the way or providing additional
functionality. |
| FSDataInputStream |
Utility that wraps a
FSInputStream in a DataInputStream
and buffers input through a BufferedInputStream. |
| FSDataOutputStream |
Utility that wraps a
OutputStream in a DataOutputStream. |
| FSInputStream |
FSInputStream is a generic old InputStream with a little bit
of RAF-style seek ability.
|
| FsServerDefaults |
Provides server default configuration values to clients.
|
| FsStatus |
This class is used to represent the capacity, free and used space on a
FileSystem. |
| GlobFilter |
A filter for POSIX glob pattern with brace expansions.
|
| LocalFileSystem |
Implement the FileSystem API for the checksumed local filesystem.
|
| LocatedFileStatus |
This class defines a FileStatus that includes a file's block locations.
|
| Options |
This class contains options related to file system operations.
|
| Path |
Names a file or directory in a
FileSystem. |
| QuotaUsage |
Store the quota usage of a directory.
|
| RawLocalFileSystem |
Implement the FileSystem API for the raw local filesystem.
|
| StorageStatistics |
StorageStatistics contains statistics data for a FileSystem or FileContext
instance.
|
| SWebHdfs |
AbstractFileSystem implementation for HDFS over the web (secure).
|
| Trash |
Provides a trash facility which supports pluggable Trash policies.
|
| TrashPolicy |
This interface is used for implementing different Trash policies.
|
| WebHdfs |
AbstractFileSystem implementation for HDFS over the web.
|
| 列挙型 | 説明 |
|---|---|
| CacheFlag |
Specifies semantics for CacheDirective operations.
|
| CreateFlag |
CreateFlag specifies the file create semantic.
|
| GlobalStorageStatistics |
Stores global storage statistics objects.
|
| ReadOption |
Options that can be used when reading from a FileSystem.
|
| StorageType |
Defines the types of supported storage media.
|
| XAttrCodec |
The value of
XAttr is byte[], this class is to
covert byte[] to some kind of string representation or convert back. |
| XAttrSetFlag |
| 例外 | 説明 |
|---|---|
| ChecksumException |
Thrown for checksum errors.
|
| FileAlreadyExistsException |
Used when target file already exists for any operation and
is not configured to be overwritten.
|
| InvalidPathException |
Path string is invalid either because it has invalid characters or due to
other file system specific reasons.
|
| ParentNotDirectoryException |
Indicates that the parent of specified Path is not a directory
as expected.
|
| UnsupportedFileSystemException |
File system for a given file system name/scheme is not supported
|
| エラー | 説明 |
|---|---|
| FSError |
Thrown for unexpected filesystem errors, presumed to reflect disk errors
in the native filesystem.
|
Implementations of AbstractFileSystem for hdfs
over rpc and hdfs over web.
Copyright © 2016 Apache Software Foundation. All rights reserved.