Uses of Package
org.apache.hadoop.mapred

Packages that use org.apache.hadoop.mapred
org.apache.hadoop.contrib.index.example   
org.apache.hadoop.contrib.index.mapred   
org.apache.hadoop.contrib.utils.join   
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.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.jobcontrol Utilities for managing dependent jobs. 
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.mapred.pipes Hadoop Pipes allows C++ code to use Hadoop DFS and map/reduce. 
org.apache.hadoop.mapreduce   
org.apache.hadoop.mapreduce.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. 
 

Classes in org.apache.hadoop.mapred used by org.apache.hadoop.contrib.index.example
FileInputFormat
          A base class for file-based InputFormat.
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.
OutputCollector
          Collects the <key, value> pairs output by Mappers and Reducers.
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.contrib.index.mapred
FileOutputFormat
          A base class for OutputFormat.
InputFormat
          InputFormat describes the input-specification for a Map-Reduce job.
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.
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.
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.contrib.utils.join
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.examples.terasort
InvalidJobConfException
          This exception is thrown when jobconf misses some mendatory attributes or value of some attributes is invalid.
 

Classes in org.apache.hadoop.mapred used by org.apache.hadoop.mapred
ClusterStatus
          Status information on the current state of the Map-Reduce cluster.
ClusterStatus.BlackListInfo
          Class which encapsulates information about a blacklisted tasktracker.
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.
JobClient.TaskStatusFilter
           
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.
SequenceFileInputFilter.FilterBase
          base class for Filters
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.
Utils.OutputFileUtils.OutputLogFilter
          This class filters log files from directory given It doesnt accept paths having _logs.
 

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 JobTracker.
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.
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.
 

Classes in org.apache.hadoop.mapred used by org.apache.hadoop.mapreduce.security
JobConf
          A map/reduce job configuration.
 

Classes in org.apache.hadoop.mapred used by org.apache.hadoop.streaming
FileInputFormat
          A base class for file-based InputFormat.
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.
JobClient
          JobClient is the primary interface for the user-job to interact with the JobTracker.
JobConf
          A map/reduce job configuration.
JobConfigurable
          That what may be configured.
JobID
          JobID represents the immutable and unique identifier for the job.
KeyValueTextInputFormat
          An InputFormat for plain text files.
Mapper
          Maps input key/value pairs to a set of intermediate key/value pairs.
MapRunnable
          Expert: Generic interface for Mappers.
MapRunner
          Default MapRunnable implementation.
OutputCollector
          Collects the <key, value> pairs output by Mappers and Reducers.
RecordReader
          RecordReader reads <key, value> pairs from an InputSplit.
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.
 



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