Uses of Package
org.apache.hadoop.mapred

Packages that use org.apache.hadoop.mapred

org.apache.hadoop.mapred
org.apache.hadoop.mapred.jobcontrol
org.apache.hadoop.mapred.join
org.apache.hadoop.mapred.lib
org.apache.hadoop.mapred.lib.aggregate
org.apache.hadoop.mapred.lib.db
org.apache.hadoop.mapred.pipes
org.apache.hadoop.mapreduce
org.apache.hadoop.mapreduce.security

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

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

Counters
A set of named counters.

Counters.Counter
A counter record, comprising its name and value.

Counters.Group
Group of counters, comprising of counters from a particular counter Enum class.

FileAlreadyExistsException
Used when target file already exists for any operation and is not configured to be overwritten.

FileInputFormat
A base class for file-based InputFormat.

FileOutputFormat
A base class for OutputFormat.

FileSplit
A section of an input file.

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

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

InvalidJobConfException
This exception is thrown when jobconf misses some mendatory attributes or value of some attributes is invalid.

JobConf
A map/reduce job configuration.

JobConfigurable
That what may be configured.

JobContext

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

JobPriority
Used to describe the priority of the running job.

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

JobStatus
Describes the current status of a job.

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

MapRunnable
Expert: Generic interface for Mappers.

OutputCollector
Collects the <key, value> pairs output by Mappers and Reducers.

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
RecordReader reads <key, value> pairs from an InputSplit.

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.

Reporter
A facility for Map-Reduce applications to report progress and update counters, status information etc.

RunningJob
RunningJob is the user-interface to query for details on a running Map-Reduce job.

SequenceFileInputFormat
An InputFormat for SequenceFiles.

SequenceFileOutputFormat
An OutputFormat that writes SequenceFiles.

TaskAttemptContext

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

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.mapred used by org.apache.hadoop.mapred.jobcontrol

JobClient
JobClient is the primary interface for the user-job to interact with the cluster.

JobConf
A map/reduce job configuration.

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

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

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

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

JobConf
A map/reduce job configuration.

RecordReader
RecordReader reads <key, value> pairs from an InputSplit.

Reporter
A facility for Map-Reduce applications to report progress and update counters, status information etc.

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

FileInputFormat
A base class for file-based InputFormat.

FileOutputFormat
A base class for OutputFormat.

FileSplit
A section of an input file.

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

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

JobConf
A map/reduce job configuration.

JobConfigurable
That what may be configured.

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

MapReduceBase
Base class for Mapper and Reducer implementations.

MapRunnable
Expert: Generic interface for Mappers.

OutputCollector
Collects the <key, value> pairs output by Mappers and Reducers.

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

Partitioner
Partitions the key space.

RecordReader
RecordReader reads <key, value> pairs from an InputSplit.

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.

Reporter
A facility for Map-Reduce applications to report progress and update counters, status information etc.

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

JobConf
A map/reduce job configuration.

JobConfigurable
That what may be configured.

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

OutputCollector
Collects the <key, value> pairs output by Mappers and Reducers.

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

Reporter
A facility for Map-Reduce applications to report progress and update counters, status information etc.

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

JobConf
A map/reduce job configuration.

JobConfigurable
That what may be configured.

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

RecordReader
RecordReader reads <key, value> pairs from an InputSplit.

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

Reporter
A facility for Map-Reduce applications to report progress and update counters, status information etc.

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

JobConf
A map/reduce job configuration.

RunningJob
RunningJob is the user-interface to query for details on a running Map-Reduce job.

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

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

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

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

JobConf
A map/reduce job configuration.