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See:
Description
| Class Summary | |
|---|---|
| AggregateWordCount | This is an example Aggregated Hadoop Map/Reduce application. |
| AggregateWordCount.WordCountPlugInClass | |
| AggregateWordHistogram | This is an example Aggregated Hadoop Map/Reduce application. |
| AggregateWordHistogram.AggregateWordHistogramPlugin | |
| DBCountPageView | This is a demonstrative program, which uses DBInputFormat for reading the input data from a database, and DBOutputFormat for writing the data to the database. |
| ExampleDriver | A description of an example program based on its class and a human-readable description. |
| Grep | |
| Join | This is the trivial map/reduce program that does absolutely nothing other than use the framework to fragment and sort the input values. |
| MultiFileWordCount | MultiFileWordCount is an example to demonstrate the usage of MultiFileInputFormat. |
| MultiFileWordCount.MapClass | This Mapper is similar to the one in MultiFileWordCount.MapClass. |
| MultiFileWordCount.MultiFileLineRecordReader | RecordReader is responsible from extracting records from the InputSplit. |
| MultiFileWordCount.MyInputFormat | To use MultiFileInputFormat, one should extend it, to return a
(custom) RecordReader. |
| MultiFileWordCount.WordOffset | This record keeps <filename,offset> pairs. |
| PiEstimator | A Map-reduce program to estimate the value of Pi using quasi-Monte Carlo method. |
| PiEstimator.PiMapper | Mapper class for Pi estimation. |
| PiEstimator.PiReducer | Reducer class for Pi estimation. |
| RandomTextWriter | This program uses map/reduce to just run a distributed job where there is no interaction between the tasks and each task writes a large unsorted random sequence of words. |
| RandomWriter | This program uses map/reduce to just run a distributed job where there is no interaction between the tasks and each task write a large unsorted random binary sequence file of BytesWritable. |
| SecondarySort | This is an example Hadoop Map/Reduce application. |
| SecondarySort.FirstGroupingComparator | Compare only the first part of the pair, so that reduce is called once for each value of the first part. |
| SecondarySort.FirstPartitioner | Partition based on the first part of the pair. |
| SecondarySort.IntPair | Define a pair of integers that are writable. |
| SecondarySort.IntPair.Comparator | A Comparator that compares serialized IntPair. |
| SecondarySort.MapClass | Read two integers from each line and generate a key, value pair as ((left, right), right). |
| SecondarySort.Reduce | A reducer class that just emits the sum of the input values. |
| SleepJob | Dummy class for testing MR framefork. |
| SleepJob.EmptySplit | |
| SleepJob.SleepInputFormat | |
| Sort<K,V> | This is the trivial map/reduce program that does absolutely nothing other than use the framework to fragment and sort the input values. |
| WordCount | |
| WordCount.IntSumReducer | |
| WordCount.TokenizerMapper | |
Hadoop example code.
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