|
Interface Summary |
| InputFormat<K,V> |
InputFormat describes the input-specification for a
Map-Reduce job. |
| InputSplit |
InputSplit represents the data to be processed by an
individual Mapper. |
| InputSplitWithLocationInfo |
|
| JobConfigurable |
That what may be configured. |
| JobContext |
|
| Mapper<K1,V1,K2,V2> |
Maps input key/value pairs to a set of intermediate key/value pairs. |
| MapRunnable<K1,V1,K2,V2> |
Expert: Generic interface for Mappers. |
| OutputCollector<K,V> |
Collects the <key, value> pairs output by Mappers
and Reducers. |
| OutputFormat<K,V> |
OutputFormat describes the output-specification for a
Map-Reduce job. |
| Partitioner<K2,V2> |
Partitions the key space. |
| RecordReader<K,V> |
RecordReader reads <key, value> pairs from an
InputSplit. |
| RecordWriter<K,V> |
RecordWriter writes the output <key, value> pairs
to an output file. |
| Reducer<K2,V2,K3,V3> |
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. |
| TaskAttemptContext |
|
|
Class Summary |
| 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. |
| FileInputFormat<K,V> |
A base class for file-based InputFormat. |
| FileOutputCommitter |
An OutputCommitter that commits files specified
in job output directory i.e. |
| FileOutputFormat<K,V> |
A base class for OutputFormat. |
| FileSplit |
A section of an input file. |
| FixedLengthInputFormat |
FixedLengthInputFormat is an input format used to read input files
which contain fixed length records. |
| ID |
A general identifier, which internally stores the id
as an integer. |
| 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. |
| 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. |
| KeyValueLineRecordReader |
This class treats a line in the input as a key/value pair separated by a
separator character. |
| KeyValueTextInputFormat |
An InputFormat for plain text files. |
| MapFileOutputFormat |
An OutputFormat that writes MapFiles. |
| MapReduceBase |
Base class for Mapper and Reducer implementations. |
| MapRunner<K1,V1,K2,V2> |
Default MapRunnable implementation. |
| MultiFileInputFormat<K,V> |
An abstract InputFormat that returns MultiFileSplit's
in MultiFileInputFormat.getSplits(JobConf, int) method. |
| MultiFileSplit |
A sub-collection of input files. |
| OutputCommitter |
OutputCommitter describes the commit of task output for a
Map-Reduce job. |
| OutputLogFilter |
This class filters log files from directory given
It doesnt accept paths having _logs. |
| SequenceFileAsBinaryInputFormat |
InputFormat reading keys, values from SequenceFiles in binary (raw)
format. |
| SequenceFileAsBinaryOutputFormat |
An OutputFormat that writes keys, values to
SequenceFiles in binary(raw) format |
| SequenceFileAsTextInputFormat |
This class is similar to SequenceFileInputFormat,
except it generates SequenceFileAsTextRecordReader
which converts the input keys and values to their
String forms by calling toString() method. |
| SequenceFileAsTextRecordReader |
This class converts the input keys and values to their String forms by calling toString()
method. |
| SequenceFileInputFilter<K,V> |
A class that allows a map/red job to work on a sample of sequence files. |
| SequenceFileInputFormat<K,V> |
An InputFormat for SequenceFiles. |
| SequenceFileOutputFormat<K,V> |
An OutputFormat that writes SequenceFiles. |
| SequenceFileRecordReader<K,V> |
An RecordReader for SequenceFiles. |
| SkipBadRecords |
Utility class for skip bad records functionality. |
| SplitLocationInfo |
|
| TaskAttemptID |
TaskAttemptID represents the immutable and unique identifier for
a task attempt. |
| TaskCompletionEvent |
This is used to track task completion events on
job tracker. |
| TaskID |
TaskID represents the immutable and unique identifier for
a Map or Reduce Task. |
| TaskReport |
A report on the state of a task. |
| TextInputFormat |
An InputFormat for plain text files. |
| TextOutputFormat<K,V> |
An OutputFormat that writes plain text files. |
| Utils |
A utility class. |