Uses of Package org.apache.hadoop.io (Hadoop 0.20.2+320 API)
Date: 2010-06-28

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## 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.mapred.lib.db Package
org.apache.hadoop.mapreduce.lib.input |
org.apache.hadoop.mapreduce.lib.map |
org.apache.hadoop.mapreduce.lib.partition |
org.apache.hadoop.mapreduce.lib.reduce |
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.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 `WritableComparable`s.

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.
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 `WritableComparable`s.
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 `WritableComparable`s.

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 `WritableComparable`s.

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.

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.input
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.map
Text This class stores text using standard UTF8 encoding.

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.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 `WritableComparable`s.

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
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`.

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