Package org.apache.hadoop.fs

An abstract file system API.


Interface Summary
HasFileDescriptor Having a FileDescriptor
PositionedReadable Stream that permits positional reading.
Seekable Stream that permits seeking.
Syncable This interface declare the sync() operation.

Class Summary
BufferedFSInputStream A class optimizes reading from FSInputStream by bufferring
ChecksumFileSystem Abstract Checksumed FileSystem.
CommonConfigurationKeys This class contains constants for configuration keys used in the common code.
ContentSummary Store the summary of a content (a directory or a file).
DF Filesystem disk space usage statistics.
DU Filesystem disk space usage statistics.
FileChecksum An abstract class representing file checksums for files.
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, buffers output through a BufferedOutputStream and creates a checksum file.
FSInputChecker This is a generic input stream for verifying checksums for data before it is read by a user.
FSInputStream FSInputStream is a generic old InputStream with a little bit of RAF-style seek ability.
FSOutputSummer This is a generic output stream for generating checksums for data before it is written to the underlying stream
FsShell Provide command line access to a FileSystem.
FsUrlStreamHandlerFactory Factory for URL stream handlers.
GlobPattern A class for POSIX glob pattern with brace expansions.
HardLink Class for creating hardlinks.
HardLink.LinkStats HardLink statistics counters and methods.
HarFileSystem This is an implementation of the Hadoop Archive Filesystem.
InMemoryFileSystem Deprecated.
LocalDirAllocator An implementation of a round-robin scheme for disk allocation for creating files.
LocalFileSystem Implement the FileSystem API for the checksumed local filesystem.
MD5MD5CRC32FileChecksum MD5 of MD5 of CRC32.
Path Names a file or directory in a FileSystem.
RawLocalFileSystem Implement the FileSystem API for the raw local filesystem.
Trash Provides a trash feature.

Enum Summary

Exception Summary
ChecksumException Thrown for checksum errors.
FileAlreadyExistsException Used when target file already exists for any operation and is not configured to be overwritten.

Error Summary
FSError Thrown for unexpected filesystem errors, presumed to reflect disk errors in the native filesystem.

Package org.apache.hadoop.fs Description

An abstract file system API.

Copyright © 2009 The Apache Software Foundation