Package | Description |
---|---|
org.apache.hadoop.conf |
Configuration of system parameters.
|
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.ftp | |
org.apache.hadoop.fs.kfs |
A client for the Kosmos filesystem (KFS)
|
org.apache.hadoop.fs.s3 |
A distributed, block-based implementation of
FileSystem that uses Amazon S3
as a backing store. |
org.apache.hadoop.fs.s3native |
A distributed implementation of
FileSystem for reading and writing files on
Amazon S3. |
org.apache.hadoop.fs.shell | |
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.compress | |
org.apache.hadoop.io.serializer |
This package provides a mechanism for using different serialization frameworks
in Hadoop.
|
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.pipes |
Hadoop Pipes allows C++ code to use Hadoop DFS and map/reduce.
|
org.apache.hadoop.mapred.tools | |
org.apache.hadoop.net |
Network-related classes.
|
org.apache.hadoop.security.authorize | |
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.util |
Common utilities.
|
Modifier and Type | Class and Description |
---|---|
class |
Configured
Base class for things that may be configured with a
Configuration . |
Modifier and Type | Class and Description |
---|---|
class |
DBCountPageView
This is a demonstrative program, which uses DBInputFormat for reading
the input data from a database, and DBOutputFormat for writing the data
to the database.
|
class |
Grep |
class |
Join
This is the trivial map/reduce program that does absolutely nothing
other than use the framework to fragment and sort the input values.
|
class |
MultiFileWordCount
MultiFileWordCount is an example to demonstrate the usage of
MultiFileInputFormat.
|
class |
PiEstimator
A Map-reduce program to estimate the value of Pi
using quasi-Monte Carlo method.
|
class |
RandomTextWriter
This program uses map/reduce to just run a distributed job where there is
no interaction between the tasks and each task writes a large unsorted
random sequence of words.
|
class |
RandomWriter
This program uses map/reduce to just run a distributed job where there is
no interaction between the tasks and each task write a large unsorted
random binary sequence file of BytesWritable.
|
class |
SleepJob
Dummy class for testing MR framefork.
|
static class |
SleepJob.SleepInputFormat |
class |
Sort<K,V>
This is the trivial map/reduce program that does absolutely nothing
other than use the framework to fragment and sort the input values.
|
Modifier and Type | Class and Description |
---|---|
class |
DistributedPentomino
Launch a distributed pentomino solver.
|
Modifier and Type | Class and Description |
---|---|
class |
TeraGen
Generate the official terasort input data set.
|
class |
TeraSort
Generates the sampled split points, launches the job, and waits for it to
finish.
|
class |
TeraValidate
Generate 1 mapper per a file that checks to make sure the keys
are sorted within each file.
|
Modifier and Type | Class and Description |
---|---|
class |
ChecksumFileSystem
Abstract Checksumed FileSystem.
|
class |
FileSystem
An abstract base class for a fairly generic filesystem.
|
class |
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. |
class |
FsShell
Provide command line access to a FileSystem.
|
class |
HarFileSystem
This is an implementation of the Hadoop Archive
Filesystem.
|
class |
InMemoryFileSystem
Deprecated.
|
class |
LocalFileSystem
Implement the FileSystem API for the checksumed local filesystem.
|
class |
RawLocalFileSystem
Implement the FileSystem API for the raw local filesystem.
|
class |
Trash
Provides a trash feature.
|
Modifier and Type | Class and Description |
---|---|
class |
FTPFileSystem
A
FileSystem backed by an FTP client provided by Apache Commons Net. |
Modifier and Type | Class and Description |
---|---|
class |
KosmosFileSystem
A FileSystem backed by KFS.
|
Modifier and Type | Class and Description |
---|---|
class |
MigrationTool
This class is a tool for migrating data from an older to a newer version
of an S3 filesystem.
|
class |
S3FileSystem
A block-based
FileSystem backed by
Amazon S3. |
Modifier and Type | Class and Description |
---|---|
class |
NativeS3FileSystem
A
FileSystem for reading and writing files stored on
Amazon S3. |
Modifier and Type | Class and Description |
---|---|
class |
Command
An abstract class for the execution of a file system command
|
class |
Count
Count the number of directories, files, bytes, quota, and remaining quota.
|
Modifier and Type | Class and Description |
---|---|
class |
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.
|
class |
GenericWritable
A wrapper for Writable instances.
|
class |
MapWritable
A Writable Map.
|
class |
ObjectWritable
A polymorphic Writable that writes an instance with it's class name.
|
class |
SortedMapWritable
A Writable SortedMap.
|
Modifier and Type | Class and Description |
---|---|
class |
DefaultCodec |
class |
GzipCodec
This class creates gzip compressors/decompressors.
|
Modifier and Type | Class and Description |
---|---|
class |
SerializationFactory
A factory for
Serialization s. |
class |
WritableSerialization
A
Serialization for Writable s that delegates to
Writable.write(java.io.DataOutput) and
Writable.readFields(java.io.DataInput) . |
Modifier and Type | Interface and Description |
---|---|
static interface |
SequenceFileInputFilter.Filter
filter interface
|
Modifier and Type | Class and Description |
---|---|
class |
JobClient
JobClient is the primary interface for the user-job to interact
with the JobTracker . |
static class |
SequenceFileInputFilter.FilterBase
base class for Filters
|
static class |
SequenceFileInputFilter.MD5Filter
This class returns a set of records by examing the MD5 digest of its
key against a filtering frequency f.
|
static class |
SequenceFileInputFilter.PercentFilter
This class returns a percentage of records
The percentage is determined by a filtering frequency f using
the criteria record# % f == 0.
|
static class |
SequenceFileInputFilter.RegexFilter
Records filter by matching key to regex
|
Modifier and Type | Class and Description |
---|---|
class |
CompositeRecordReader<K extends WritableComparable,V extends Writable,X extends Writable>
A RecordReader that can effect joins of RecordReaders sharing a common key
type and partitioning.
|
class |
InnerJoinRecordReader<K extends WritableComparable>
Full inner join.
|
class |
JoinRecordReader<K extends WritableComparable>
Base class for Composite joins returning Tuples of arbitrary Writables.
|
class |
MultiFilterRecordReader<K extends WritableComparable,V extends Writable>
Base class for Composite join returning values derived from multiple
sources, but generally not tuples.
|
class |
OuterJoinRecordReader<K extends WritableComparable>
Full outer join.
|
class |
OverrideRecordReader<K extends WritableComparable,V extends Writable>
Prefer the "rightmost" data source for this key.
|
Modifier and Type | Class and Description |
---|---|
class |
InputSampler<K,V>
Utility for collecting samples and writing a partition file for
TotalOrderPartitioner . |
Modifier and Type | Class and Description |
---|---|
class |
Submitter
The main entry point and job submitter.
|
Modifier and Type | Class and Description |
---|---|
class |
MRAdmin
Administrative access to Hadoop Map-Reduce.
|
Modifier and Type | Class and Description |
---|---|
class |
ScriptBasedMapping
This class implements the
DNSToSwitchMapping interface using a
script configured via topology.script.file.name . |
class |
SocksSocketFactory
Specialized SocketFactory to create sockets with a SOCKS proxy
|
Modifier and Type | Class and Description |
---|---|
class |
ConfiguredPolicy
A
Configuration based security Policy for Hadoop. |
Modifier and Type | Class and Description |
---|---|
class |
StreamJob
All the client-side work happens here.
|
Modifier and Type | Interface and Description |
---|---|
interface |
Tool
A tool interface that supports handling of generic command-line options.
|
Modifier and Type | Class and Description |
---|---|
class |
LinuxMemoryCalculatorPlugin
Plugin to calculate virtual and physical memories on Linux systems.
|
class |
MemoryCalculatorPlugin
Plugin to calculate virtual and physical memories on the system.
|
Copyright © 2010 The Apache Software Foundation