25 | | || || || |
26 | | || AggregateWordCount || This is an example Aggregated Hadoop Map/Reduce application. || |
27 | | || AggregateWordCount.WordCountPlugInClass || || |
28 | | || AggregateWordHistogram || This is an example Aggregated Hadoop Map/Reduce application. || |
29 | | || AggregateWordHistogram.AggregateWordHistogramPlugin || || |
30 | | || 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. || |
31 | | || ExampleDriver || A description of an example program based on its class and a human-readable description. || |
32 | | || Grep || || |
33 | | || Join || This is the trivial map/reduce program that does absolutely nothing other than use the framework to fragment and sort the input values. || |
34 | | || MultiFileWordCount || MultiFileWordCount is an example to demonstrate the usage of MultiFileInputFormat. || |
35 | | || MultiFileWordCount.MapClass || This Mapper is similar to the one in WordCount.MapClass. || |
36 | | || MultiFileWordCount.MultiFileLineRecordReader || RecordReader is responsible from extracting records from the InputSplit. || |
37 | | || MultiFileWordCount.MyInputFormat || To use MultiFileInputFormat, one should extend it, to return a (custom) RecordReader. || |
38 | | || MultiFileWordCount.WordOffset || This record keeps <filename,offset> pairs. || |
39 | | || PiEstimator || A Map-reduce program to estimaate the valu eof Pi using monte-carlo method. || |
40 | | || PiEstimator.PiMapper || Mappper class for Pi estimation. |
41 | | PiEstimator.PiReducer || |
42 | | || 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. || |
43 | | || 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. || |
44 | | || SleepJob || Dummy class for testing MR framefork. || |
45 | | || 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. || |
46 | | || WordCount || This is an example Hadoop Map/Reduce application. || |
47 | | || WordCount.MapClass || Counts the words in each line. || |
48 | | || WordCount.Reduce || A reducer class that just emits the sum of the input values. || |
49 | | |
| 25 | {{{ |
| 26 | #!html |
| 27 | </a> |
| 28 | </p><p> |
| 29 | |
| 30 | </p><table summary="" border="1" cellpadding="3" cellspacing="0" width="100%"> |
| 31 | <tbody><tr class="TableHeadingColor" bgcolor="#ccccff"> |
| 32 | <th colspan="2" align="left"><font size="+2"> |
| 33 | <b>Class Summary</b></font></th> |
| 34 | </tr> |
| 35 | <tr class="TableRowColor" bgcolor="white"> |
| 36 | <td width="15%"><b><a href="../../../../org/apache/hadoop/examples/AggregateWordCount.html" title="class in org.apache.hadoop.examples">AggregateWordCount</a></b></td> |
| 37 | |
| 38 | <td>This is an example Aggregated Hadoop Map/Reduce application.</td> |
| 39 | </tr> |
| 40 | <tr class="TableRowColor" bgcolor="white"> |
| 41 | <td width="15%"><b><a href="../../../../org/apache/hadoop/examples/AggregateWordCount.WordCountPlugInClass.html" title="class in org.apache.hadoop.examples">AggregateWordCount.WordCountPlugInClass</a></b></td> |
| 42 | <td> </td> |
| 43 | </tr> |
| 44 | <tr class="TableRowColor" bgcolor="white"> |
| 45 | <td width="15%"><b><a href="../../../../org/apache/hadoop/examples/AggregateWordHistogram.html" title="class in org.apache.hadoop.examples">AggregateWordHistogram</a></b></td> |
| 46 | <td>This is an example Aggregated Hadoop Map/Reduce application.</td> |
| 47 | </tr> |
| 48 | <tr class="TableRowColor" bgcolor="white"> |
| 49 | <td width="15%"><b><a href="../../../../org/apache/hadoop/examples/AggregateWordHistogram.AggregateWordHistogramPlugin.html" title="class in org.apache.hadoop.examples">AggregateWordHistogram.AggregateWordHistogramPlugin</a></b></td> |
| 50 | |
| 51 | <td> </td> |
| 52 | </tr> |
| 53 | <tr class="TableRowColor" bgcolor="white"> |
| 54 | <td width="15%"><b><a href="../../../../org/apache/hadoop/examples/DBCountPageView.html" title="class in org.apache.hadoop.examples">DBCountPageView</a></b></td> |
| 55 | <td>This is a demonstrative program, which uses DBInputFormat for reading |
| 56 | the input data from a database, and DBOutputFormat for writing the data |
| 57 | to the database.</td> |
| 58 | </tr> |
| 59 | <tr class="TableRowColor" bgcolor="white"> |
| 60 | <td width="15%"><b><a href="../../../../org/apache/hadoop/examples/ExampleDriver.html" title="class in org.apache.hadoop.examples">ExampleDriver</a></b></td> |
| 61 | <td>A description of an example program based on its class and a |
| 62 | human-readable description.</td> |
| 63 | </tr> |
| 64 | <tr class="TableRowColor" bgcolor="white"> |
| 65 | <td width="15%"><b><a href="../../../../org/apache/hadoop/examples/Grep.html" title="class in org.apache.hadoop.examples">Grep</a></b></td> |
| 66 | |
| 67 | <td> </td> |
| 68 | </tr> |
| 69 | <tr class="TableRowColor" bgcolor="white"> |
| 70 | <td width="15%"><b><a href="../../../../org/apache/hadoop/examples/Join.html" title="class in org.apache.hadoop.examples">Join</a></b></td> |
| 71 | <td>This is the trivial map/reduce program that does absolutely nothing |
| 72 | other than use the framework to fragment and sort the input values.</td> |
| 73 | </tr> |
| 74 | <tr class="TableRowColor" bgcolor="white"> |
| 75 | <td width="15%"><b><a href="../../../../org/apache/hadoop/examples/MultiFileWordCount.html" title="class in org.apache.hadoop.examples">MultiFileWordCount</a></b></td> |
| 76 | <td>MultiFileWordCount is an example to demonstrate the usage of |
| 77 | MultiFileInputFormat.</td> |
| 78 | </tr> |
| 79 | <tr class="TableRowColor" bgcolor="white"> |
| 80 | <td width="15%"><b><a href="../../../../org/apache/hadoop/examples/MultiFileWordCount.MapClass.html" title="class in org.apache.hadoop.examples">MultiFileWordCount.MapClass</a></b></td> |
| 81 | |
| 82 | <td>This Mapper is similar to the one in <a href="../../../../org/apache/hadoop/examples/WordCount.MapClass.html" title="class in org.apache.hadoop.examples"><code>WordCount.MapClass</code></a>.</td> |
| 83 | </tr> |
| 84 | <tr class="TableRowColor" bgcolor="white"> |
| 85 | <td width="15%"><b><a href="../../../../org/apache/hadoop/examples/MultiFileWordCount.MultiFileLineRecordReader.html" title="class in org.apache.hadoop.examples">MultiFileWordCount.MultiFileLineRecordReader</a></b></td> |
| 86 | <td>RecordReader is responsible from extracting records from the InputSplit.</td> |
| 87 | </tr> |
| 88 | <tr class="TableRowColor" bgcolor="white"> |
| 89 | <td width="15%"><b><a href="../../../../org/apache/hadoop/examples/MultiFileWordCount.MyInputFormat.html" title="class in org.apache.hadoop.examples">MultiFileWordCount.MyInputFormat</a></b></td> |
| 90 | <td>To use <a href="../../../../org/apache/hadoop/mapred/MultiFileInputFormat.html" title="class in org.apache.hadoop.mapred"><code>MultiFileInputFormat</code></a>, one should extend it, to return a |
| 91 | (custom) <a href="../../../../org/apache/hadoop/mapred/RecordReader.html" title="interface in org.apache.hadoop.mapred"><code>RecordReader</code></a>.</td> |
| 92 | |
| 93 | </tr> |
| 94 | <tr class="TableRowColor" bgcolor="white"> |
| 95 | <td width="15%"><b><a href="../../../../org/apache/hadoop/examples/MultiFileWordCount.WordOffset.html" title="class in org.apache.hadoop.examples">MultiFileWordCount.WordOffset</a></b></td> |
| 96 | <td>This record keeps <filename,offset> pairs.</td> |
| 97 | </tr> |
| 98 | <tr class="TableRowColor" bgcolor="white"> |
| 99 | <td width="15%"><b><a href="../../../../org/apache/hadoop/examples/PiEstimator.html" title="class in org.apache.hadoop.examples">PiEstimator</a></b></td> |
| 100 | <td>A Map-reduce program to estimaate the valu eof Pi using monte-carlo |
| 101 | method.</td> |
| 102 | </tr> |
| 103 | <tr class="TableRowColor" bgcolor="white"> |
| 104 | |
| 105 | <td width="15%"><b><a href="../../../../org/apache/hadoop/examples/PiEstimator.PiMapper.html" title="class in org.apache.hadoop.examples">PiEstimator.PiMapper</a></b></td> |
| 106 | <td>Mappper class for Pi estimation.</td> |
| 107 | </tr> |
| 108 | <tr class="TableRowColor" bgcolor="white"> |
| 109 | <td width="15%"><b><a href="../../../../org/apache/hadoop/examples/PiEstimator.PiReducer.html" title="class in org.apache.hadoop.examples">PiEstimator.PiReducer</a></b></td> |
| 110 | <td> </td> |
| 111 | </tr> |
| 112 | <tr class="TableRowColor" bgcolor="white"> |
| 113 | <td width="15%"><b><a href="../../../../org/apache/hadoop/examples/RandomTextWriter.html" title="class in org.apache.hadoop.examples">RandomTextWriter</a></b></td> |
| 114 | <td>This program uses map/reduce to just run a distributed job where there is |
| 115 | no interaction between the tasks and each task writes a large unsorted |
| 116 | random sequence of words.</td> |
| 117 | </tr> |
| 118 | <tr class="TableRowColor" bgcolor="white"> |
| 119 | |
| 120 | <td width="15%"><b><a href="../../../../org/apache/hadoop/examples/RandomWriter.html" title="class in org.apache.hadoop.examples">RandomWriter</a></b></td> |
| 121 | <td>This program uses map/reduce to just run a distributed job where there is |
| 122 | no interaction between the tasks and each task write a large unsorted |
| 123 | random binary sequence file of BytesWritable.</td> |
| 124 | </tr> |
| 125 | <tr class="TableRowColor" bgcolor="white"> |
| 126 | <td width="15%"><b><a href="../../../../org/apache/hadoop/examples/SleepJob.html" title="class in org.apache.hadoop.examples">SleepJob</a></b></td> |
| 127 | <td>Dummy class for testing MR framefork.</td> |
| 128 | </tr> |
| 129 | <tr class="TableRowColor" bgcolor="white"> |
| 130 | <td width="15%"><b><a href="../../../../org/apache/hadoop/examples/SleepJob.EmptySplit.html" title="class in org.apache.hadoop.examples">SleepJob.EmptySplit</a></b></td> |
| 131 | <td> </td> |
| 132 | </tr> |
| 133 | <tr class="TableRowColor" bgcolor="white"> |
| 134 | |
| 135 | <td width="15%"><b><a href="../../../../org/apache/hadoop/examples/SleepJob.SleepInputFormat.html" title="class in org.apache.hadoop.examples">SleepJob.SleepInputFormat</a></b></td> |
| 136 | <td> </td> |
| 137 | </tr> |
| 138 | <tr class="TableRowColor" bgcolor="white"> |
| 139 | <td width="15%"><b><a href="../../../../org/apache/hadoop/examples/Sort.html" title="class in org.apache.hadoop.examples">Sort<K,V></a></b></td> |
| 140 | <td>This is the trivial map/reduce program that does absolutely nothing |
| 141 | other than use the framework to fragment and sort the input values.</td> |
| 142 | </tr> |
| 143 | <tr class="TableRowColor" bgcolor="white"> |
| 144 | <td width="15%"><b><a href="../../../../org/apache/hadoop/examples/WordCount.html" title="class in org.apache.hadoop.examples">WordCount</a></b></td> |
| 145 | <td>This is an example Hadoop Map/Reduce application.</td> |
| 146 | </tr> |
| 147 | |
| 148 | <tr class="TableRowColor" bgcolor="white"> |
| 149 | <td width="15%"><b><a href="../../../../org/apache/hadoop/examples/WordCount.MapClass.html" title="class in org.apache.hadoop.examples">WordCount.MapClass</a></b></td> |
| 150 | <td>Counts the words in each line.</td> |
| 151 | </tr> |
| 152 | <tr class="TableRowColor" bgcolor="white"> |
| 153 | <td width="15%"><b><a href="../../../../org/apache/hadoop/examples/WordCount.Reduce.html" title="class in org.apache.hadoop.examples">WordCount.Reduce</a></b></td> |
| 154 | <td>A reducer class that just emits the sum of the input values.</td> |
| 155 | </tr> |
| 156 | </tbody></table> |
| 157 | |
| 158 | }}} |