Uses of Package
org.apache.hadoop.mapred

Packages that use org.apache.hadoop.mapred
org.apache.hadoop.examples Hadoop example code. 
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.mapred A system for scalable, fault-tolerant, distributed computation over large data collections. 
org.apache.hadoop.mapred.lib Library of generally useful mappers, reducers, and partitioners. 
 

Classes in org.apache.hadoop.mapred used by org.apache.hadoop.examples
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
          Passed to Mapper and Reducer implementations to collect output data.
Reducer
          Reduces a set of intermediate values which share a key to a smaller set of values.
Reporter
          Passed to application code to permit alteration of status.
 

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

Classes in org.apache.hadoop.mapred used by org.apache.hadoop.mapred
ClusterStatus
          Summarizes the size and current state of the cluster.
FileSplit
          A section of an input file.
InputFormat
          An input data format.
InputFormatBase
          A base class for InputFormat.
JobConf
          A map/reduce job configuration.
JobConfigurable
          That what may be configured.
JobTracker
          JobTracker is the central location for submitting and tracking MR jobs in a network environment.
MapRunnable
          Expert: Permits greater control of map processing.
OutputCollector
          Passed to Mapper and Reducer implementations to collect output data.
OutputFormat
          An output data format.
OutputFormatBase
          A base class for OutputFormat.
Partitioner
          Partitions the key space.
RecordReader
          Reads key/value pairs from an input file FileSplit.
RecordWriter
          Writes key/value pairs to an output file.
Reporter
          Passed to application code to permit alteration of status.
RunningJob
          Includes details on a running MapReduce job.
TaskReport
          A report on the state of a task.
 

Classes in org.apache.hadoop.mapred used by org.apache.hadoop.mapred.lib
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
          Passed to Mapper and Reducer implementations to collect output data.
Partitioner
          Partitions the key space.
Reducer
          Reduces a set of intermediate values which share a key to a smaller set of values.
Reporter
          Passed to application code to permit alteration of status.
 



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