Uses of Package
org.apache.hadoop.mapreduce

Packages that use org.apache.hadoop.mapreduce

org.apache.hadoop.mapred
org.apache.hadoop.mapred.lib.db
org.apache.hadoop.mapreduce
org.apache.hadoop.mapreduce.counters	This package contains the implementations of different types of map-reduce counters.
org.apache.hadoop.mapreduce.jobhistory
org.apache.hadoop.mapreduce.lib.aggregate
org.apache.hadoop.mapreduce.lib.chain
org.apache.hadoop.mapreduce.lib.db
org.apache.hadoop.mapreduce.lib.fieldsel
org.apache.hadoop.mapreduce.lib.input
org.apache.hadoop.mapreduce.lib.jobcontrol
org.apache.hadoop.mapreduce.lib.join
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.protocol
org.apache.hadoop.mapreduce.security.token
org.apache.hadoop.mapreduce.server.jobtracker
org.apache.hadoop.mapreduce.server.tasktracker
org.apache.hadoop.mapreduce.split
org.apache.hadoop.mapreduce.task
org.apache.hadoop.mapreduce.task.reduce
org.apache.hadoop.mapreduce.tools
org.apache.hadoop.mapreduce.util

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

Cluster
Provides a way to access information about the map/reduce cluster.

Cluster.JobTrackerStatus

Counter
A named counter that tracks the progress of a map/reduce job.

Counters
Counters holds per job/task counters, defined either by the Map-Reduce framework or applications.

ID
A general identifier, which internally stores the id as an integer.

InputSplit
InputSplit represents the data to be processed by an individual Mapper.

JobACL
Job related ACLs

JobContext
A read-only view of the job that is provided to the tasks while they are running.

JobID
JobID represents the immutable and unique identifier for the job.

JobStatus
Describes the current status of a job.

JobStatus.State
Current state of the job

OutputCommitter
OutputCommitter describes the commit of task output for a Map-Reduce job.

OutputFormat
OutputFormat describes the output-specification for a Map-Reduce job.

QueueInfo
Class that contains the information regarding the Job Queues which are maintained by the Hadoop Map/Reduce framework.

RecordWriter
RecordWriter writes the output <key, value> pairs to an output file.

Reducer
Reduces a set of intermediate values which share a key to a smaller set of values.

Reducer.Context
The Context passed on to the Reducer implementations.

StatusReporter

TaskAttemptContext
The context for task attempts.

TaskAttemptID
TaskAttemptID represents the immutable and unique identifier for a task attempt.

TaskCompletionEvent
This is used to track task completion events on job tracker.

TaskID
TaskID represents the immutable and unique identifier for a Map or Reduce Task.

TaskReport
A report on the state of a task.

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

RecordReader
The record reader breaks the data into key/value pairs for input to the Mapper.

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

Cluster
Provides a way to access information about the map/reduce cluster.

Cluster.JobTrackerStatus

ClusterMetrics
Status information on the current state of the Map-Reduce cluster.

Counter
A named counter that tracks the progress of a map/reduce job.

Counters
Counters holds per job/task counters, defined either by the Map-Reduce framework or applications.

FileSystemCounter

ID
A general identifier, which internally stores the id as an integer.

InputFormat
InputFormat describes the input-specification for a Map-Reduce job.

InputSplit
InputSplit represents the data to be processed by an individual Mapper.

Job
The job submitter's view of the Job.

Job.JobState

Job.TaskStatusFilter

JobACL
Job related ACLs

JobContext
A read-only view of the job that is provided to the tasks while they are running.

JobCounter

JobID
JobID represents the immutable and unique identifier for the job.

JobPriority
Used to describe the priority of the running job.

JobStatus
Describes the current status of a job.

JobStatus.State
Current state of the job

MapContext
The context that is given to the Mapper.

Mapper
Maps input key/value pairs to a set of intermediate key/value pairs.

Mapper.Context
The Context passed on to the Mapper implementations.

MRJobConfig

OutputCommitter
OutputCommitter describes the commit of task output for a Map-Reduce job.

OutputFormat
OutputFormat describes the output-specification for a Map-Reduce job.

Partitioner
Partitions the key space.

QueueAclsInfo
Class to encapsulate Queue ACLs for a particular user.

QueueInfo
Class that contains the information regarding the Job Queues which are maintained by the Hadoop Map/Reduce framework.

QueueState
Enum representing queue state

RecordReader
The record reader breaks the data into key/value pairs for input to the Mapper.

RecordWriter
RecordWriter writes the output <key, value> pairs to an output file.

ReduceContext
The context passed to the Reducer.

Reducer
Reduces a set of intermediate values which share a key to a smaller set of values.

Reducer.Context
The Context passed on to the Reducer implementations.

TaskAttemptContext
The context for task attempts.

TaskAttemptID
TaskAttemptID represents the immutable and unique identifier for a task attempt.

TaskCompletionEvent
This is used to track task completion events on job tracker.

TaskCompletionEvent.Status

TaskCounter

TaskID
TaskID represents the immutable and unique identifier for a Map or Reduce Task.

TaskInputOutputContext
A context object that allows input and output from the task.

TaskReport
A report on the state of a task.

TaskTrackerInfo
Information about TaskTracker.

TaskType
Enum for map, reduce, job-setup, job-cleanup, task-cleanup task types.

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

Counter
A named counter that tracks the progress of a map/reduce job.

FileSystemCounter

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

Counters
Counters holds per job/task counters, defined either by the Map-Reduce framework or applications.

JobACL
Job related ACLs

JobID
JobID represents the immutable and unique identifier for the job.

TaskAttemptID
TaskAttemptID represents the immutable and unique identifier for a task attempt.

TaskID
TaskID represents the immutable and unique identifier for a Map or Reduce Task.

TaskType
Enum for map, reduce, job-setup, job-cleanup, task-cleanup task types.

Classes in org.apache.hadoop.mapreduce used by org.apache.hadoop.mapreduce.lib.aggregate

Job
The job submitter's view of the Job.

Mapper
Maps input key/value pairs to a set of intermediate key/value pairs.

Mapper.Context
The Context passed on to the Mapper implementations.

Reducer
Reduces a set of intermediate values which share a key to a smaller set of values.

Reducer.Context
The Context passed on to the Reducer implementations.

Classes in org.apache.hadoop.mapreduce used by org.apache.hadoop.mapreduce.lib.chain

Job
The job submitter's view of the Job.

Mapper
Maps input key/value pairs to a set of intermediate key/value pairs.

Mapper.Context
The Context passed on to the Mapper implementations.

Reducer
Reduces a set of intermediate values which share a key to a smaller set of values.

Reducer.Context
The Context passed on to the Reducer implementations.

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

InputFormat
InputFormat describes the input-specification for a Map-Reduce job.

InputSplit
InputSplit represents the data to be processed by an individual Mapper.

Job
The job submitter's view of the Job.

JobContext
A read-only view of the job that is provided to the tasks while they are running.

OutputCommitter
OutputCommitter describes the commit of task output for a Map-Reduce job.

OutputFormat
OutputFormat describes the output-specification for a Map-Reduce job.

RecordReader
The record reader breaks the data into key/value pairs for input to the Mapper.

RecordWriter
RecordWriter writes the output <key, value> pairs to an output file.

TaskAttemptContext
The context for task attempts.

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

Mapper
Maps input key/value pairs to a set of intermediate key/value pairs.

Mapper.Context
The Context passed on to the Mapper implementations.

Reducer
Reduces a set of intermediate values which share a key to a smaller set of values.

Reducer.Context
The Context passed on to the Reducer implementations.

Classes in org.apache.hadoop.mapreduce used by org.apache.hadoop.mapreduce.lib.input

InputFormat
InputFormat describes the input-specification for a Map-Reduce job.

InputSplit
InputSplit represents the data to be processed by an individual Mapper.

Job
The job submitter's view of the Job.

JobContext
A read-only view of the job that is provided to the tasks while they are running.

Mapper
Maps input key/value pairs to a set of intermediate key/value pairs.

Mapper.Context
The Context passed on to the Mapper implementations.

RecordReader
The record reader breaks the data into key/value pairs for input to the Mapper.

TaskAttemptContext
The context for task attempts.

Classes in org.apache.hadoop.mapreduce used by org.apache.hadoop.mapreduce.lib.jobcontrol

Job
The job submitter's view of the Job.

JobID
JobID represents the immutable and unique identifier for the job.

Classes in org.apache.hadoop.mapreduce used by org.apache.hadoop.mapreduce.lib.join

InputFormat
InputFormat describes the input-specification for a Map-Reduce job.

InputSplit
InputSplit represents the data to be processed by an individual Mapper.

JobContext
A read-only view of the job that is provided to the tasks while they are running.

RecordReader
The record reader breaks the data into key/value pairs for input to the Mapper.

TaskAttemptContext
The context for task attempts.

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

Counter
A named counter that tracks the progress of a map/reduce job.

InputFormat
InputFormat describes the input-specification for a Map-Reduce job.

InputSplit
InputSplit represents the data to be processed by an individual Mapper.

Job
The job submitter's view of the Job.

JobContext
A read-only view of the job that is provided to the tasks while they are running.

JobID
JobID represents the immutable and unique identifier for the job.

MapContext
The context that is given to the Mapper.

Mapper
Maps input key/value pairs to a set of intermediate key/value pairs.

Mapper.Context
The Context passed on to the Mapper implementations.

MRJobConfig

OutputCommitter
OutputCommitter describes the commit of task output for a Map-Reduce job.

OutputFormat
OutputFormat describes the output-specification for a Map-Reduce job.

Partitioner
Partitions the key space.

Reducer
Reduces a set of intermediate values which share a key to a smaller set of values.

TaskAttemptContext
The context for task attempts.

TaskAttemptID
TaskAttemptID represents the immutable and unique identifier for a task attempt.

TaskInputOutputContext
A context object that allows input and output from the task.

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

Job
The job submitter's view of the Job.

JobContext
A read-only view of the job that is provided to the tasks while they are running.

JobStatus.State
Current state of the job

OutputCommitter
OutputCommitter describes the commit of task output for a Map-Reduce job.

OutputFormat
OutputFormat describes the output-specification for a Map-Reduce job.

Partitioner
Partitions the key space.

RecordWriter
RecordWriter writes the output <key, value> pairs to an output file.

TaskAttemptContext
The context for task attempts.

TaskInputOutputContext
A context object that allows input and output from the task.

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

InputFormat
InputFormat describes the input-specification for a Map-Reduce job.

Job
The job submitter's view of the Job.

JobContext
A read-only view of the job that is provided to the tasks while they are running.

Partitioner
Partitions the key space.

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

Counter
A named counter that tracks the progress of a map/reduce job.

InputFormat
InputFormat describes the input-specification for a Map-Reduce job.

JobContext
A read-only view of the job that is provided to the tasks while they are running.

JobID
JobID represents the immutable and unique identifier for the job.

Mapper
Maps input key/value pairs to a set of intermediate key/value pairs.

MRJobConfig

OutputCommitter
OutputCommitter describes the commit of task output for a Map-Reduce job.

OutputFormat
OutputFormat describes the output-specification for a Map-Reduce job.

Partitioner
Partitions the key space.

ReduceContext
The context passed to the Reducer.

Reducer
Reduces a set of intermediate values which share a key to a smaller set of values.

Reducer.Context
The Context passed on to the Reducer implementations.

TaskAttemptContext
The context for task attempts.

TaskAttemptID
TaskAttemptID represents the immutable and unique identifier for a task attempt.

TaskInputOutputContext
A context object that allows input and output from the task.

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

Cluster.JobTrackerStatus

ClusterMetrics
Status information on the current state of the Map-Reduce cluster.

Counters
Counters holds per job/task counters, defined either by the Map-Reduce framework or applications.

JobID
JobID represents the immutable and unique identifier for the job.

JobStatus
Describes the current status of a job.

QueueAclsInfo
Class to encapsulate Queue ACLs for a particular user.

QueueInfo
Class that contains the information regarding the Job Queues which are maintained by the Hadoop Map/Reduce framework.

TaskAttemptID
TaskAttemptID represents the immutable and unique identifier for a task attempt.

TaskCompletionEvent
This is used to track task completion events on job tracker.

TaskReport
A report on the state of a task.

TaskTrackerInfo
Information about TaskTracker.

TaskType
Enum for map, reduce, job-setup, job-cleanup, task-cleanup task types.

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

JobID
JobID represents the immutable and unique identifier for the job.

Classes in org.apache.hadoop.mapreduce used by org.apache.hadoop.mapreduce.server.jobtracker

MRConfig
Place holder for cluster level configuration keys.

Classes in org.apache.hadoop.mapreduce used by org.apache.hadoop.mapreduce.server.tasktracker

MRConfig
Place holder for cluster level configuration keys.

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

InputSplit
InputSplit represents the data to be processed by an individual Mapper.

JobID
JobID represents the immutable and unique identifier for the job.

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

Counter
A named counter that tracks the progress of a map/reduce job.

InputFormat
InputFormat describes the input-specification for a Map-Reduce job.

InputSplit
InputSplit represents the data to be processed by an individual Mapper.

JobContext
A read-only view of the job that is provided to the tasks while they are running.

JobID
JobID represents the immutable and unique identifier for the job.

MapContext
The context that is given to the Mapper.

Mapper
Maps input key/value pairs to a set of intermediate key/value pairs.

MRJobConfig

OutputCommitter
OutputCommitter describes the commit of task output for a Map-Reduce job.

OutputFormat
OutputFormat describes the output-specification for a Map-Reduce job.

Partitioner
Partitions the key space.

RecordReader
The record reader breaks the data into key/value pairs for input to the Mapper.

RecordWriter
RecordWriter writes the output <key, value> pairs to an output file.

ReduceContext
The context passed to the Reducer.

ReduceContext.ValueIterator
Iterator to iterate over values for a given group of records.

Reducer
Reduces a set of intermediate values which share a key to a smaller set of values.

StatusReporter

TaskAttemptContext
The context for task attempts.

TaskAttemptID
TaskAttemptID represents the immutable and unique identifier for a task attempt.

TaskInputOutputContext
A context object that allows input and output from the task.

Classes in org.apache.hadoop.mapreduce used by org.apache.hadoop.mapreduce.task.reduce

TaskAttemptID
TaskAttemptID represents the immutable and unique identifier for a task attempt.

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

Cluster
Provides a way to access information about the map/reduce cluster.

Counters
Counters holds per job/task counters, defined either by the Map-Reduce framework or applications.

Job
The job submitter's view of the Job.

JobStatus
Describes the current status of a job.

TaskAttemptID
TaskAttemptID represents the immutable and unique identifier for a task attempt.

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

Counter
A named counter that tracks the progress of a map/reduce job.