Class and Description |
---|
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 . |
InputSplitWithLocationInfo |
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
Mapper s. |
OutputCollector |
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 SequenceFile s. |
SequenceFileOutputFormat
An
OutputFormat that writes SequenceFile s. |
SplitLocationInfo |
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.
|
Class and Description |
---|
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.
|
Class and Description |
---|
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.
|
Class and Description |
---|
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 |
MapRunnable
Expert: Generic interface for
Mapper s. |
OutputCollector |
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.
|
Class and Description |
---|
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 |
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.
|
Class and Description |
---|
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.
|
Class and Description |
---|
JobConf
A map/reduce job configuration.
|
RunningJob
RunningJob is the user-interface to query for details on a
running Map-Reduce job. |
Class and Description |
---|
ID
A general identifier, which internally stores the id
as an integer.
|
SplitLocationInfo |
TaskCompletionEvent
This is used to track task completion events on
job tracker.
|
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