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| 82 | <H2> |
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| 83 | Package org.apache.hadoop.mapreduce |
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| 84 | </H2> |
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| 85 | |
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| 86 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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| 87 | <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> |
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| 88 | <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> |
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| 89 | <B>Class Summary</B></FONT></TH> |
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| 90 | </TR> |
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| 91 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 92 | <TD WIDTH="15%"><B><A HREF="../../../../org/apache/hadoop/mapreduce/Counter.html" title="class in org.apache.hadoop.mapreduce">Counter</A></B></TD> |
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| 93 | <TD>A named counter that tracks the progress of a map/reduce job.</TD> |
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| 94 | </TR> |
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| 95 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 96 | <TD WIDTH="15%"><B><A HREF="../../../../org/apache/hadoop/mapreduce/CounterGroup.html" title="class in org.apache.hadoop.mapreduce">CounterGroup</A></B></TD> |
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| 97 | <TD>A group of <A HREF="../../../../org/apache/hadoop/mapreduce/Counter.html" title="class in org.apache.hadoop.mapreduce"><CODE>Counter</CODE></A>s that logically belong together.</TD> |
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| 98 | </TR> |
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| 99 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 100 | <TD WIDTH="15%"><B><A HREF="../../../../org/apache/hadoop/mapreduce/Counters.html" title="class in org.apache.hadoop.mapreduce">Counters</A></B></TD> |
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| 101 | <TD> </TD> |
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| 102 | </TR> |
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| 103 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 104 | <TD WIDTH="15%"><B><A HREF="../../../../org/apache/hadoop/mapreduce/ID.html" title="class in org.apache.hadoop.mapreduce">ID</A></B></TD> |
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| 105 | <TD>A general identifier, which internally stores the id |
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| 106 | as an integer.</TD> |
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| 107 | </TR> |
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| 108 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 109 | <TD WIDTH="15%"><B><A HREF="../../../../org/apache/hadoop/mapreduce/InputFormat.html" title="class in org.apache.hadoop.mapreduce">InputFormat<K,V></A></B></TD> |
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| 110 | <TD><code>InputFormat</code> describes the input-specification for a |
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| 111 | Map-Reduce job.</TD> |
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| 112 | </TR> |
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| 113 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 114 | <TD WIDTH="15%"><B><A HREF="../../../../org/apache/hadoop/mapreduce/InputSplit.html" title="class in org.apache.hadoop.mapreduce">InputSplit</A></B></TD> |
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| 115 | <TD><code>InputSplit</code> represents the data to be processed by an |
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| 116 | individual <A HREF="../../../../org/apache/hadoop/mapreduce/Mapper.html" title="class in org.apache.hadoop.mapreduce"><CODE>Mapper</CODE></A>.</TD> |
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| 117 | </TR> |
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| 118 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 119 | <TD WIDTH="15%"><B><A HREF="../../../../org/apache/hadoop/mapreduce/Job.html" title="class in org.apache.hadoop.mapreduce">Job</A></B></TD> |
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| 120 | <TD>The job submitter's view of the Job.</TD> |
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| 121 | </TR> |
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| 122 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 123 | <TD WIDTH="15%"><B><A HREF="../../../../org/apache/hadoop/mapreduce/JobContext.html" title="class in org.apache.hadoop.mapreduce">JobContext</A></B></TD> |
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| 124 | <TD>A read-only view of the job that is provided to the tasks while they |
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| 125 | are running.</TD> |
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| 126 | </TR> |
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| 127 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 128 | <TD WIDTH="15%"><B><A HREF="../../../../org/apache/hadoop/mapreduce/JobID.html" title="class in org.apache.hadoop.mapreduce">JobID</A></B></TD> |
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| 129 | <TD>JobID represents the immutable and unique identifier for |
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| 130 | the job.</TD> |
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| 131 | </TR> |
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| 132 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 133 | <TD WIDTH="15%"><B><A HREF="../../../../org/apache/hadoop/mapreduce/MapContext.html" title="class in org.apache.hadoop.mapreduce">MapContext<KEYIN,VALUEIN,KEYOUT,VALUEOUT></A></B></TD> |
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| 134 | <TD>The context that is given to the <A HREF="../../../../org/apache/hadoop/mapreduce/Mapper.html" title="class in org.apache.hadoop.mapreduce"><CODE>Mapper</CODE></A>.</TD> |
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| 135 | </TR> |
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| 136 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 137 | <TD WIDTH="15%"><B><A HREF="../../../../org/apache/hadoop/mapreduce/Mapper.html" title="class in org.apache.hadoop.mapreduce">Mapper<KEYIN,VALUEIN,KEYOUT,VALUEOUT></A></B></TD> |
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| 138 | <TD>Maps input key/value pairs to a set of intermediate key/value pairs.</TD> |
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| 139 | </TR> |
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| 140 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 141 | <TD WIDTH="15%"><B><A HREF="../../../../org/apache/hadoop/mapreduce/OutputCommitter.html" title="class in org.apache.hadoop.mapreduce">OutputCommitter</A></B></TD> |
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| 142 | <TD><code>OutputCommitter</code> describes the commit of task output for a |
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| 143 | Map-Reduce job.</TD> |
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| 144 | </TR> |
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| 145 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 146 | <TD WIDTH="15%"><B><A HREF="../../../../org/apache/hadoop/mapreduce/OutputFormat.html" title="class in org.apache.hadoop.mapreduce">OutputFormat<K,V></A></B></TD> |
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| 147 | <TD><code>OutputFormat</code> describes the output-specification for a |
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| 148 | Map-Reduce job.</TD> |
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| 149 | </TR> |
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| 150 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 151 | <TD WIDTH="15%"><B><A HREF="../../../../org/apache/hadoop/mapreduce/Partitioner.html" title="class in org.apache.hadoop.mapreduce">Partitioner<KEY,VALUE></A></B></TD> |
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| 152 | <TD>Partitions the key space.</TD> |
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| 153 | </TR> |
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| 154 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 155 | <TD WIDTH="15%"><B><A HREF="../../../../org/apache/hadoop/mapreduce/RecordReader.html" title="class in org.apache.hadoop.mapreduce">RecordReader<KEYIN,VALUEIN></A></B></TD> |
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| 156 | <TD>The record reader breaks the data into key/value pairs for input to the |
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| 157 | <A HREF="../../../../org/apache/hadoop/mapreduce/Mapper.html" title="class in org.apache.hadoop.mapreduce"><CODE>Mapper</CODE></A>.</TD> |
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| 158 | </TR> |
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| 159 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 160 | <TD WIDTH="15%"><B><A HREF="../../../../org/apache/hadoop/mapreduce/RecordWriter.html" title="class in org.apache.hadoop.mapreduce">RecordWriter<K,V></A></B></TD> |
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| 161 | <TD><code>RecordWriter</code> writes the output <key, value> pairs |
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| 162 | to an output file.</TD> |
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| 163 | </TR> |
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| 164 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 165 | <TD WIDTH="15%"><B><A HREF="../../../../org/apache/hadoop/mapreduce/ReduceContext.html" title="class in org.apache.hadoop.mapreduce">ReduceContext<KEYIN,VALUEIN,KEYOUT,VALUEOUT></A></B></TD> |
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| 166 | <TD>The context passed to the <A HREF="../../../../org/apache/hadoop/mapreduce/Reducer.html" title="class in org.apache.hadoop.mapreduce"><CODE>Reducer</CODE></A>.</TD> |
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| 167 | </TR> |
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| 168 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 169 | <TD WIDTH="15%"><B><A HREF="../../../../org/apache/hadoop/mapreduce/Reducer.html" title="class in org.apache.hadoop.mapreduce">Reducer<KEYIN,VALUEIN,KEYOUT,VALUEOUT></A></B></TD> |
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| 170 | <TD>Reduces a set of intermediate values which share a key to a smaller set of |
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| 171 | values.</TD> |
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| 172 | </TR> |
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| 173 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 174 | <TD WIDTH="15%"><B><A HREF="../../../../org/apache/hadoop/mapreduce/StatusReporter.html" title="class in org.apache.hadoop.mapreduce">StatusReporter</A></B></TD> |
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| 175 | <TD> </TD> |
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| 176 | </TR> |
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| 177 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 178 | <TD WIDTH="15%"><B><A HREF="../../../../org/apache/hadoop/mapreduce/TaskAttemptContext.html" title="class in org.apache.hadoop.mapreduce">TaskAttemptContext</A></B></TD> |
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| 179 | <TD>The context for task attempts.</TD> |
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| 180 | </TR> |
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| 181 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 182 | <TD WIDTH="15%"><B><A HREF="../../../../org/apache/hadoop/mapreduce/TaskAttemptID.html" title="class in org.apache.hadoop.mapreduce">TaskAttemptID</A></B></TD> |
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| 183 | <TD>TaskAttemptID represents the immutable and unique identifier for |
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| 184 | a task attempt.</TD> |
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| 185 | </TR> |
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| 186 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 187 | <TD WIDTH="15%"><B><A HREF="../../../../org/apache/hadoop/mapreduce/TaskID.html" title="class in org.apache.hadoop.mapreduce">TaskID</A></B></TD> |
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| 188 | <TD>TaskID represents the immutable and unique identifier for |
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| 189 | a Map or Reduce Task.</TD> |
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| 190 | </TR> |
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| 191 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 192 | <TD WIDTH="15%"><B><A HREF="../../../../org/apache/hadoop/mapreduce/TaskInputOutputContext.html" title="class in org.apache.hadoop.mapreduce">TaskInputOutputContext<KEYIN,VALUEIN,KEYOUT,VALUEOUT></A></B></TD> |
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| 193 | <TD>A context object that allows input and output from the task.</TD> |
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| 194 | </TR> |
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| 195 | </TABLE> |
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| 196 | |
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| 197 | |
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| 198 | <P> |
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| 203 | <B>Enum Summary</B></FONT></TH> |
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| 204 | </TR> |
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| 205 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 206 | <TD WIDTH="15%"><B><A HREF="../../../../org/apache/hadoop/mapreduce/Job.JobState.html" title="enum in org.apache.hadoop.mapreduce">Job.JobState</A></B></TD> |
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| 207 | <TD> </TD> |
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