Uses of Package
org.apache.hadoop.io

Packages that use org.apache.hadoop.io

org.apache.hadoop.conf	Configuration of system parameters.
org.apache.hadoop.contrib.index.example
org.apache.hadoop.contrib.index.mapred
org.apache.hadoop.contrib.utils.join
org.apache.hadoop.examples	Hadoop example code.
org.apache.hadoop.examples.dancing	This package is a distributed implementation of Knuth's dancing links algorithm that can run under Hadoop.
org.apache.hadoop.examples.terasort	This package consists of 3 map/reduce applications for Hadoop to compete in the annual terabyte sort competition.
org.apache.hadoop.fs	An abstract file system API.
org.apache.hadoop.fs.permission
org.apache.hadoop.io	Generic i/o code for use when reading and writing data to the network, to databases, and to files.
org.apache.hadoop.io.file.tfile
org.apache.hadoop.io.serializer	This package provides a mechanism for using different serialization frameworks in Hadoop.
org.apache.hadoop.ipc	Tools to help define network clients and servers.
org.apache.hadoop.mapred	A software framework for easily writing applications which process vast amounts of data (multi-terabyte data-sets) parallelly on large clusters (thousands of nodes) built of commodity hardware in a reliable, fault-tolerant manner.
org.apache.hadoop.mapred.join	Given a set of sorted datasets keyed with the same class and yielding equal partitions, it is possible to effect a join of those datasets prior to the map.
org.apache.hadoop.mapred.lib	Library of generally useful mappers, reducers, and partitioners.
org.apache.hadoop.mapred.lib.aggregate	Classes for performing various counting and aggregations.
org.apache.hadoop.mapred.lib.db	org.apache.hadoop.mapred.lib.db Package
org.apache.hadoop.mapreduce
org.apache.hadoop.mapreduce.lib.db
org.apache.hadoop.mapreduce.lib.fieldsel
org.apache.hadoop.mapreduce.lib.map
org.apache.hadoop.mapreduce.lib.output
org.apache.hadoop.mapreduce.lib.partition
org.apache.hadoop.mapreduce.lib.reduce
org.apache.hadoop.mapreduce.security
org.apache.hadoop.mapreduce.security.token
org.apache.hadoop.mapreduce.security.token.delegation
org.apache.hadoop.mapreduce.split
org.apache.hadoop.record	Hadoop record I/O contains classes and a record description language translator for simplifying serialization and deserialization of records in a language-neutral manner.
org.apache.hadoop.record.meta
org.apache.hadoop.security
org.apache.hadoop.security.authorize
org.apache.hadoop.security.token
org.apache.hadoop.security.token.delegation
org.apache.hadoop.streaming	Hadoop Streaming is a utility which allows users to create and run Map-Reduce jobs with any executables (e.g.
org.apache.hadoop.streaming.io
org.apache.hadoop.typedbytes	Typed bytes are sequences of bytes in which the first byte is a type code.
org.apache.hadoop.util	Common utilities.
org.apache.hadoop.util.bloom

Classes in org.apache.hadoop.io used by org.apache.hadoop.conf

Writable
A serializable object which implements a simple, efficient, serialization protocol, based on DataInput and DataOutput.

Classes in org.apache.hadoop.io used by org.apache.hadoop.contrib.index.example

Closeable
Deprecated. use java.io.Closeable

Text
This class stores text using standard UTF8 encoding.

Writable
A serializable object which implements a simple, efficient, serialization protocol, based on DataInput and DataOutput.

Classes in org.apache.hadoop.io used by org.apache.hadoop.contrib.index.mapred

Closeable
Deprecated. use java.io.Closeable

Text
This class stores text using standard UTF8 encoding.

Writable
A serializable object which implements a simple, efficient, serialization protocol, based on DataInput and DataOutput.

WritableComparable
A Writable which is also Comparable.

Classes in org.apache.hadoop.io used by org.apache.hadoop.contrib.utils.join

Closeable
Deprecated. use java.io.Closeable

Text
This class stores text using standard UTF8 encoding.

Writable
A serializable object which implements a simple, efficient, serialization protocol, based on DataInput and DataOutput.

Classes in org.apache.hadoop.io used by org.apache.hadoop.examples

BooleanWritable
A WritableComparable for booleans.

Closeable
Deprecated. use java.io.Closeable

IntWritable
A WritableComparable for ints.

LongWritable
A WritableComparable for longs.

NullWritable
Singleton Writable with no data.

RawComparator
A Comparator that operates directly on byte representations of objects.

Text
This class stores text using standard UTF8 encoding.

Writable
A serializable object which implements a simple, efficient, serialization protocol, based on DataInput and DataOutput.

WritableComparable
A Writable which is also Comparable.

WritableComparator
A Comparator for WritableComparables.

Classes in org.apache.hadoop.io used by org.apache.hadoop.examples.dancing

Closeable
Deprecated. use java.io.Closeable

Text
This class stores text using standard UTF8 encoding.

WritableComparable
A Writable which is also Comparable.

Classes in org.apache.hadoop.io used by org.apache.hadoop.examples.terasort

Closeable
Deprecated. use java.io.Closeable

LongWritable
A WritableComparable for longs.

NullWritable
Singleton Writable with no data.

Text
This class stores text using standard UTF8 encoding.

Classes in org.apache.hadoop.io used by org.apache.hadoop.fs

MD5Hash
A Writable for MD5 hash values.

Writable
A serializable object which implements a simple, efficient, serialization protocol, based on DataInput and DataOutput.

Classes in org.apache.hadoop.io used by org.apache.hadoop.fs.permission

Writable
A serializable object which implements a simple, efficient, serialization protocol, based on DataInput and DataOutput.

Classes in org.apache.hadoop.io used by org.apache.hadoop.io

AbstractMapWritable
Abstract base class for MapWritable and SortedMapWritable Unlike org.apache.nutch.crawl.MapWritable, this class allows creation of MapWritable<Writable, MapWritable> so the CLASS_TO_ID and ID_TO_CLASS maps travel with the class instead of being static.

BinaryComparable
Interface supported by WritableComparable types supporting ordering/permutation by a representative set of bytes.

BytesWritable
A byte sequence that is usable as a key or value.

DataOutputBuffer
A reusable DataOutput implementation that writes to an in-memory buffer.

LongWritable.Comparator
A Comparator optimized for LongWritable.

MapFile
A file-based map from keys to values.

MapFile.Reader
Provide access to an existing map.

MapFile.Writer
Writes a new map.

MapWritable
A Writable Map.

MD5Hash
A Writable for MD5 hash values.

NullWritable
Singleton Writable with no data.

ObjectWritable
A polymorphic Writable that writes an instance with it's class name.

OutputBuffer
A reusable OutputStream implementation that writes to an in-memory buffer.

RawComparator
A Comparator that operates directly on byte representations of objects.

ReadaheadPool
Manages a pool of threads which can issue readahead requests on file descriptors.

ReadaheadPool.ReadaheadRequest
An outstanding readahead request that has been submitted to the pool.

SequenceFile.CompressionType
The compression type used to compress key/value pairs in the SequenceFile.

SequenceFile.Metadata
The class encapsulating with the metadata of a file.

SequenceFile.Reader
Reads key/value pairs from a sequence-format file.

SequenceFile.Sorter.RawKeyValueIterator
The interface to iterate over raw keys/values of SequenceFiles.

SequenceFile.Sorter.SegmentDescriptor
This class defines a merge segment.

SequenceFile.ValueBytes
The interface to 'raw' values of SequenceFiles.

SequenceFile.Writer
Write key/value pairs to a sequence-format file.

SortedMapWritable
A Writable SortedMap.

Stringifier
Stringifier interface offers two methods to convert an object to a string representation and restore the object given its string representation.

Text
This class stores text using standard UTF8 encoding.

UTF8
Deprecated. replaced by Text

Writable
A serializable object which implements a simple, efficient, serialization protocol, based on DataInput and DataOutput.

WritableComparable
A Writable which is also Comparable.

WritableComparator
A Comparator for WritableComparables.

WritableFactory
A factory for a class of Writable.

Classes in org.apache.hadoop.io used by org.apache.hadoop.io.file.tfile

BytesWritable
A byte sequence that is usable as a key or value.

Classes in org.apache.hadoop.io used by org.apache.hadoop.io.serializer

RawComparator
A Comparator that operates directly on byte representations of objects.

Writable
A serializable object which implements a simple, efficient, serialization protocol, based on DataInput and DataOutput.

Classes in org.apache.hadoop.io used by org.apache.hadoop.ipc

Writable
A serializable object which implements a simple, efficient, serialization protocol, based on DataInput and DataOutput.

Classes in org.apache.hadoop.io used by org.apache.hadoop.mapred

BytesWritable
A byte sequence that is usable as a key or value.

Closeable
Deprecated. use java.io.Closeable

DataInputBuffer
A reusable DataInput implementation that reads from an in-memory buffer.

LongWritable
A WritableComparable for longs.

MapFile.Reader
Provide access to an existing map.

RawComparator
A Comparator that operates directly on byte representations of objects.

SequenceFile.CompressionType
The compression type used to compress key/value pairs in the SequenceFile.

SequenceFile.Reader
Reads key/value pairs from a sequence-format file.

SequenceFile.ValueBytes
The interface to 'raw' values of SequenceFiles.

Text
This class stores text using standard UTF8 encoding.

Writable
A serializable object which implements a simple, efficient, serialization protocol, based on DataInput and DataOutput.

WritableComparable
A Writable which is also Comparable.

Classes in org.apache.hadoop.io used by org.apache.hadoop.mapred.join

Writable
A serializable object which implements a simple, efficient, serialization protocol, based on DataInput and DataOutput.

WritableComparable
A Writable which is also Comparable.

WritableComparator
A Comparator for WritableComparables.

Classes in org.apache.hadoop.io used by org.apache.hadoop.mapred.lib

Closeable
Deprecated. use java.io.Closeable

LongWritable
A WritableComparable for longs.

RawComparator
A Comparator that operates directly on byte representations of objects.

Text
This class stores text using standard UTF8 encoding.

Writable
A serializable object which implements a simple, efficient, serialization protocol, based on DataInput and DataOutput.

WritableComparable
A Writable which is also Comparable.

WritableComparator
A Comparator for WritableComparables.

Classes in org.apache.hadoop.io used by org.apache.hadoop.mapred.lib.aggregate

Closeable
Deprecated. use java.io.Closeable

Text
This class stores text using standard UTF8 encoding.

Writable
A serializable object which implements a simple, efficient, serialization protocol, based on DataInput and DataOutput.

WritableComparable
A Writable which is also Comparable.

Classes in org.apache.hadoop.io used by org.apache.hadoop.mapred.lib.db

LongWritable
A WritableComparable for longs.

Writable
A serializable object which implements a simple, efficient, serialization protocol, based on DataInput and DataOutput.

Classes in org.apache.hadoop.io used by org.apache.hadoop.mapreduce

RawComparator
A Comparator that operates directly on byte representations of objects.

Writable
A serializable object which implements a simple, efficient, serialization protocol, based on DataInput and DataOutput.

WritableComparable
A Writable which is also Comparable.

Classes in org.apache.hadoop.io used by org.apache.hadoop.mapreduce.lib.db

LongWritable
A WritableComparable for longs.

Writable
A serializable object which implements a simple, efficient, serialization protocol, based on DataInput and DataOutput.

Classes in org.apache.hadoop.io used by org.apache.hadoop.mapreduce.lib.fieldsel

Text
This class stores text using standard UTF8 encoding.

Classes in org.apache.hadoop.io used by org.apache.hadoop.mapreduce.lib.map

Text
This class stores text using standard UTF8 encoding.

Classes in org.apache.hadoop.io used by org.apache.hadoop.mapreduce.lib.output

SequenceFile.Writer
Write key/value pairs to a sequence-format file.

Classes in org.apache.hadoop.io used by org.apache.hadoop.mapreduce.lib.partition

BinaryComparable
Interface supported by WritableComparable types supporting ordering/permutation by a representative set of bytes.

Classes in org.apache.hadoop.io used by org.apache.hadoop.mapreduce.lib.reduce

IntWritable
A WritableComparable for ints.

Classes in org.apache.hadoop.io used by org.apache.hadoop.mapreduce.security

Text
This class stores text using standard UTF8 encoding.

Classes in org.apache.hadoop.io used by org.apache.hadoop.mapreduce.security.token

Text
This class stores text using standard UTF8 encoding.

Writable
A serializable object which implements a simple, efficient, serialization protocol, based on DataInput and DataOutput.

Classes in org.apache.hadoop.io used by org.apache.hadoop.mapreduce.security.token.delegation

Text
This class stores text using standard UTF8 encoding.

Writable
A serializable object which implements a simple, efficient, serialization protocol, based on DataInput and DataOutput.

Classes in org.apache.hadoop.io used by org.apache.hadoop.mapreduce.split

Writable
A serializable object which implements a simple, efficient, serialization protocol, based on DataInput and DataOutput.

Classes in org.apache.hadoop.io used by org.apache.hadoop.record

RawComparator
A Comparator that operates directly on byte representations of objects.

Writable
A serializable object which implements a simple, efficient, serialization protocol, based on DataInput and DataOutput.

WritableComparable
A Writable which is also Comparable.

WritableComparator
A Comparator for WritableComparables.

Classes in org.apache.hadoop.io used by org.apache.hadoop.record.meta

Writable
A serializable object which implements a simple, efficient, serialization protocol, based on DataInput and DataOutput.

WritableComparable
A Writable which is also Comparable.

Classes in org.apache.hadoop.io used by org.apache.hadoop.security

Text
This class stores text using standard UTF8 encoding.

Writable
A serializable object which implements a simple, efficient, serialization protocol, based on DataInput and DataOutput.

Classes in org.apache.hadoop.io used by org.apache.hadoop.security.authorize

Writable
A serializable object which implements a simple, efficient, serialization protocol, based on DataInput and DataOutput.

Classes in org.apache.hadoop.io used by org.apache.hadoop.security.token

Text
This class stores text using standard UTF8 encoding.

Writable
A serializable object which implements a simple, efficient, serialization protocol, based on DataInput and DataOutput.

Classes in org.apache.hadoop.io used by org.apache.hadoop.security.token.delegation

Text
This class stores text using standard UTF8 encoding.

Writable
A serializable object which implements a simple, efficient, serialization protocol, based on DataInput and DataOutput.

Classes in org.apache.hadoop.io used by org.apache.hadoop.streaming

Closeable
Deprecated. use java.io.Closeable

Text
This class stores text using standard UTF8 encoding.

Classes in org.apache.hadoop.io used by org.apache.hadoop.streaming.io

BytesWritable
A byte sequence that is usable as a key or value.

Text
This class stores text using standard UTF8 encoding.

Writable
A serializable object which implements a simple, efficient, serialization protocol, based on DataInput and DataOutput.

Classes in org.apache.hadoop.io used by org.apache.hadoop.typedbytes

ArrayWritable
A Writable for arrays containing instances of a class.

BinaryComparable
Interface supported by WritableComparable types supporting ordering/permutation by a representative set of bytes.

BooleanWritable
A WritableComparable for booleans.

BytesWritable
A byte sequence that is usable as a key or value.

ByteWritable
A WritableComparable for a single byte.

DoubleWritable
Writable for Double values.

FloatWritable
A WritableComparable for floats.

IntWritable
A WritableComparable for ints.

LongWritable
A WritableComparable for longs.

MapWritable
A Writable Map.

SortedMapWritable
A Writable SortedMap.

Text
This class stores text using standard UTF8 encoding.

VIntWritable
A WritableComparable for integer values stored in variable-length format.

VLongWritable
A WritableComparable for longs in a variable-length format.

Writable
A serializable object which implements a simple, efficient, serialization protocol, based on DataInput and DataOutput.

WritableComparable
A Writable which is also Comparable.

Classes in org.apache.hadoop.io used by org.apache.hadoop.util

IntWritable
A WritableComparable for ints.

Text
This class stores text using standard UTF8 encoding.

Writable
A serializable object which implements a simple, efficient, serialization protocol, based on DataInput and DataOutput.

Classes in org.apache.hadoop.io used by org.apache.hadoop.util.bloom

Writable
A serializable object which implements a simple, efficient, serialization protocol, based on DataInput and DataOutput.

WritableComparable
A Writable which is also Comparable.