|Status information on the current state of the Map-Reduce cluster.
|A named counter that tracks the progress of a map/reduce job.
|A group of
Counters that logically belong together.
|A general identifier, which internally stores the id
as an integer.
InputFormat describes the input-specification for a
InputSplit represents the data to be processed by an
|The job submitter's view of the Job.
|A read-only view of the job that is provided to the tasks while they
|JobID represents the immutable and unique identifier for
|Describes the current status of a job.
|A utility to manage job submission files.
Note that this class is for framework internal usage only and is
not to be used by users directly.
|The context that is given to the
|Maps input key/value pairs to a set of intermediate key/value pairs.
OutputCommitter describes the commit of task output for a
OutputFormat describes the output-specification for a
|Partitions the key space.
|The record reader breaks the data into key/value pairs for input to the
RecordWriter writes the output <key, value> pairs
to an output file.
|The context passed to the
|Reduces a set of intermediate values which share a key to a smaller set of
|The context for task attempts.
|TaskAttemptID represents the immutable and unique identifier for
a task attempt.
|TaskID represents the immutable and unique identifier for
a Map or Reduce Task.
|A context object that allows input and output from the task.