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7 | Uses of Interface org.apache.hadoop.mapred.Reducer (Hadoop 0.20.1 API) |
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82 | <CENTER> |
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83 | <H2> |
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84 | <B>Uses of Interface<br>org.apache.hadoop.mapred.Reducer</B></H2> |
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85 | </CENTER> |
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86 | |
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87 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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88 | <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> |
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89 | <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> |
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90 | Packages that use <A HREF="../../../../../org/apache/hadoop/mapred/Reducer.html" title="interface in org.apache.hadoop.mapred">Reducer</A></FONT></TH> |
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91 | </TR> |
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92 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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93 | <TD><A HREF="#org.apache.hadoop.contrib.index.mapred"><B>org.apache.hadoop.contrib.index.mapred</B></A></TD> |
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94 | <TD> </TD> |
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95 | </TR> |
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96 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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97 | <TD><A HREF="#org.apache.hadoop.contrib.utils.join"><B>org.apache.hadoop.contrib.utils.join</B></A></TD> |
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98 | <TD> </TD> |
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99 | </TR> |
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100 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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101 | <TD><A HREF="#org.apache.hadoop.examples"><B>org.apache.hadoop.examples</B></A></TD> |
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102 | <TD>Hadoop example code. </TD> |
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103 | </TR> |
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104 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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105 | <TD><A HREF="#org.apache.hadoop.mapred"><B>org.apache.hadoop.mapred</B></A></TD> |
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106 | <TD>A software framework for easily writing applications which process vast |
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107 | amounts of data (multi-terabyte data-sets) parallelly on large clusters |
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108 | (thousands of nodes) built of commodity hardware in a reliable, fault-tolerant |
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109 | manner. </TD> |
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110 | </TR> |
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111 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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112 | <TD><A HREF="#org.apache.hadoop.mapred.lib"><B>org.apache.hadoop.mapred.lib</B></A></TD> |
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113 | <TD>Library of generally useful mappers, reducers, and partitioners. </TD> |
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114 | </TR> |
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115 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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116 | <TD><A HREF="#org.apache.hadoop.mapred.lib.aggregate"><B>org.apache.hadoop.mapred.lib.aggregate</B></A></TD> |
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117 | <TD>Classes for performing various counting and aggregations. </TD> |
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118 | </TR> |
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119 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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120 | <TD><A HREF="#org.apache.hadoop.streaming"><B>org.apache.hadoop.streaming</B></A></TD> |
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121 | <TD><tt>Hadoop Streaming</tt> is a utility which allows users to create and run |
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122 | Map-Reduce jobs with any executables (e.g. </TD> |
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123 | </TR> |
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124 | </TABLE> |
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125 | |
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126 | <P> |
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127 | <A NAME="org.apache.hadoop.contrib.index.mapred"><!-- --></A> |
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128 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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129 | <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> |
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130 | <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> |
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131 | Uses of <A HREF="../../../../../org/apache/hadoop/mapred/Reducer.html" title="interface in org.apache.hadoop.mapred">Reducer</A> in <A HREF="../../../../../org/apache/hadoop/contrib/index/mapred/package-summary.html">org.apache.hadoop.contrib.index.mapred</A></FONT></TH> |
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132 | </TR> |
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133 | </TABLE> |
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134 | |
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135 | <P> |
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136 | |
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137 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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138 | <TR BGCOLOR="#CCCCFF" CLASS="TableSubHeadingColor"> |
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139 | <TH ALIGN="left" COLSPAN="2">Classes in <A HREF="../../../../../org/apache/hadoop/contrib/index/mapred/package-summary.html">org.apache.hadoop.contrib.index.mapred</A> that implement <A HREF="../../../../../org/apache/hadoop/mapred/Reducer.html" title="interface in org.apache.hadoop.mapred">Reducer</A></FONT></TH> |
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140 | </TR> |
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141 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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142 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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143 | <CODE> class</CODE></FONT></TD> |
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144 | <TD><CODE><B><A HREF="../../../../../org/apache/hadoop/contrib/index/mapred/IndexUpdateCombiner.html" title="class in org.apache.hadoop.contrib.index.mapred">IndexUpdateCombiner</A></B></CODE> |
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145 | |
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146 | <BR> |
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147 | This combiner combines multiple intermediate forms into one intermediate |
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148 | form.</TD> |
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149 | </TR> |
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150 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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151 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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152 | <CODE> class</CODE></FONT></TD> |
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153 | <TD><CODE><B><A HREF="../../../../../org/apache/hadoop/contrib/index/mapred/IndexUpdateReducer.html" title="class in org.apache.hadoop.contrib.index.mapred">IndexUpdateReducer</A></B></CODE> |
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154 | |
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155 | <BR> |
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156 | This reducer applies to a shard the changes for it.</TD> |
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157 | </TR> |
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158 | </TABLE> |
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159 | |
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160 | <P> |
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161 | <A NAME="org.apache.hadoop.contrib.utils.join"><!-- --></A> |
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162 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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163 | <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> |
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164 | <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> |
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165 | Uses of <A HREF="../../../../../org/apache/hadoop/mapred/Reducer.html" title="interface in org.apache.hadoop.mapred">Reducer</A> in <A HREF="../../../../../org/apache/hadoop/contrib/utils/join/package-summary.html">org.apache.hadoop.contrib.utils.join</A></FONT></TH> |
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166 | </TR> |
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167 | </TABLE> |
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168 | |
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169 | <P> |
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170 | |
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171 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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172 | <TR BGCOLOR="#CCCCFF" CLASS="TableSubHeadingColor"> |
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173 | <TH ALIGN="left" COLSPAN="2">Classes in <A HREF="../../../../../org/apache/hadoop/contrib/utils/join/package-summary.html">org.apache.hadoop.contrib.utils.join</A> that implement <A HREF="../../../../../org/apache/hadoop/mapred/Reducer.html" title="interface in org.apache.hadoop.mapred">Reducer</A></FONT></TH> |
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174 | </TR> |
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175 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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176 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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177 | <CODE> class</CODE></FONT></TD> |
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178 | <TD><CODE><B><A HREF="../../../../../org/apache/hadoop/contrib/utils/join/DataJoinMapperBase.html" title="class in org.apache.hadoop.contrib.utils.join">DataJoinMapperBase</A></B></CODE> |
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179 | |
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180 | <BR> |
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181 | This abstract class serves as the base class for the mapper class of a data |
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182 | join job.</TD> |
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183 | </TR> |
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184 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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185 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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186 | <CODE> class</CODE></FONT></TD> |
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187 | <TD><CODE><B><A HREF="../../../../../org/apache/hadoop/contrib/utils/join/DataJoinReducerBase.html" title="class in org.apache.hadoop.contrib.utils.join">DataJoinReducerBase</A></B></CODE> |
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188 | |
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189 | <BR> |
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190 | This abstract class serves as the base class for the reducer class of a data |
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191 | join job.</TD> |
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192 | </TR> |
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193 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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194 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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195 | <CODE> class</CODE></FONT></TD> |
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196 | <TD><CODE><B><A HREF="../../../../../org/apache/hadoop/contrib/utils/join/JobBase.html" title="class in org.apache.hadoop.contrib.utils.join">JobBase</A></B></CODE> |
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197 | |
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198 | <BR> |
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199 | A common base implementing some statics collecting mechanisms that are |
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200 | commonly used in a typical map/reduce job.</TD> |
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201 | </TR> |
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202 | </TABLE> |
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203 | |
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204 | <P> |
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205 | <A NAME="org.apache.hadoop.examples"><!-- --></A> |
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206 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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207 | <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> |
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208 | <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> |
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209 | Uses of <A HREF="../../../../../org/apache/hadoop/mapred/Reducer.html" title="interface in org.apache.hadoop.mapred">Reducer</A> in <A HREF="../../../../../org/apache/hadoop/examples/package-summary.html">org.apache.hadoop.examples</A></FONT></TH> |
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210 | </TR> |
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211 | </TABLE> |
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212 | |
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213 | <P> |
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214 | |
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215 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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216 | <TR BGCOLOR="#CCCCFF" CLASS="TableSubHeadingColor"> |
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217 | <TH ALIGN="left" COLSPAN="2">Classes in <A HREF="../../../../../org/apache/hadoop/examples/package-summary.html">org.apache.hadoop.examples</A> that implement <A HREF="../../../../../org/apache/hadoop/mapred/Reducer.html" title="interface in org.apache.hadoop.mapred">Reducer</A></FONT></TH> |
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218 | </TR> |
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219 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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220 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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221 | <CODE>static class</CODE></FONT></TD> |
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222 | <TD><CODE><B><A HREF="../../../../../org/apache/hadoop/examples/PiEstimator.PiReducer.html" title="class in org.apache.hadoop.examples">PiEstimator.PiReducer</A></B></CODE> |
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223 | |
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224 | <BR> |
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225 | Reducer class for Pi estimation.</TD> |
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226 | </TR> |
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227 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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228 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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229 | <CODE> class</CODE></FONT></TD> |
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230 | <TD><CODE><B><A HREF="../../../../../org/apache/hadoop/examples/SleepJob.html" title="class in org.apache.hadoop.examples">SleepJob</A></B></CODE> |
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231 | |
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232 | <BR> |
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233 | Dummy class for testing MR framefork.</TD> |
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234 | </TR> |
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235 | </TABLE> |
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236 | |
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237 | <P> |
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238 | <A NAME="org.apache.hadoop.mapred"><!-- --></A> |
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239 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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240 | <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> |
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241 | <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> |
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242 | Uses of <A HREF="../../../../../org/apache/hadoop/mapred/Reducer.html" title="interface in org.apache.hadoop.mapred">Reducer</A> in <A HREF="../../../../../org/apache/hadoop/mapred/package-summary.html">org.apache.hadoop.mapred</A></FONT></TH> |
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243 | </TR> |
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244 | </TABLE> |
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245 | |
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246 | <P> |
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247 | |
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248 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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249 | <TR BGCOLOR="#CCCCFF" CLASS="TableSubHeadingColor"> |
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250 | <TH ALIGN="left" COLSPAN="2">Methods in <A HREF="../../../../../org/apache/hadoop/mapred/package-summary.html">org.apache.hadoop.mapred</A> that return types with arguments of type <A HREF="../../../../../org/apache/hadoop/mapred/Reducer.html" title="interface in org.apache.hadoop.mapred">Reducer</A></FONT></TH> |
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251 | </TR> |
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252 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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253 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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254 | <CODE> <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A><? extends <A HREF="../../../../../org/apache/hadoop/mapred/Reducer.html" title="interface in org.apache.hadoop.mapred">Reducer</A>></CODE></FONT></TD> |
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255 | <TD><CODE><B>JobConf.</B><B><A HREF="../../../../../org/apache/hadoop/mapred/JobConf.html#getCombinerClass()">getCombinerClass</A></B>()</CODE> |
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256 | |
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257 | <BR> |
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258 | <B>Deprecated.</B> Get the user-defined <i>combiner</i> class used to combine map-outputs |
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259 | before being sent to the reducers.</TD> |
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260 | </TR> |
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261 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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262 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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263 | <CODE> <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A><? extends <A HREF="../../../../../org/apache/hadoop/mapred/Reducer.html" title="interface in org.apache.hadoop.mapred">Reducer</A>></CODE></FONT></TD> |
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264 | <TD><CODE><B>JobConf.</B><B><A HREF="../../../../../org/apache/hadoop/mapred/JobConf.html#getReducerClass()">getReducerClass</A></B>()</CODE> |
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265 | |
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266 | <BR> |
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267 | <B>Deprecated.</B> Get the <A HREF="../../../../../org/apache/hadoop/mapred/Reducer.html" title="interface in org.apache.hadoop.mapred"><CODE>Reducer</CODE></A> class for the job.</TD> |
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268 | </TR> |
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269 | </TABLE> |
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270 | |
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271 | <P> |
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272 | |
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273 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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274 | <TR BGCOLOR="#CCCCFF" CLASS="TableSubHeadingColor"> |
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275 | <TH ALIGN="left" COLSPAN="2">Method parameters in <A HREF="../../../../../org/apache/hadoop/mapred/package-summary.html">org.apache.hadoop.mapred</A> with type arguments of type <A HREF="../../../../../org/apache/hadoop/mapred/Reducer.html" title="interface in org.apache.hadoop.mapred">Reducer</A></FONT></TH> |
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276 | </TR> |
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277 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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278 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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279 | <CODE> void</CODE></FONT></TD> |
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280 | <TD><CODE><B>JobConf.</B><B><A HREF="../../../../../org/apache/hadoop/mapred/JobConf.html#setCombinerClass(java.lang.Class)">setCombinerClass</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A><? extends <A HREF="../../../../../org/apache/hadoop/mapred/Reducer.html" title="interface in org.apache.hadoop.mapred">Reducer</A>> theClass)</CODE> |
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281 | |
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282 | <BR> |
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283 | <B>Deprecated.</B> Set the user-defined <i>combiner</i> class used to combine map-outputs |
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284 | before being sent to the reducers.</TD> |
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285 | </TR> |
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286 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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287 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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288 | <CODE> void</CODE></FONT></TD> |
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289 | <TD><CODE><B>JobConf.</B><B><A HREF="../../../../../org/apache/hadoop/mapred/JobConf.html#setReducerClass(java.lang.Class)">setReducerClass</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A><? extends <A HREF="../../../../../org/apache/hadoop/mapred/Reducer.html" title="interface in org.apache.hadoop.mapred">Reducer</A>> theClass)</CODE> |
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290 | |
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291 | <BR> |
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292 | <B>Deprecated.</B> Set the <A HREF="../../../../../org/apache/hadoop/mapred/Reducer.html" title="interface in org.apache.hadoop.mapred"><CODE>Reducer</CODE></A> class for the job.</TD> |
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293 | </TR> |
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294 | </TABLE> |
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295 | |
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296 | <P> |
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297 | <A NAME="org.apache.hadoop.mapred.lib"><!-- --></A> |
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298 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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299 | <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> |
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300 | <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> |
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301 | Uses of <A HREF="../../../../../org/apache/hadoop/mapred/Reducer.html" title="interface in org.apache.hadoop.mapred">Reducer</A> in <A HREF="../../../../../org/apache/hadoop/mapred/lib/package-summary.html">org.apache.hadoop.mapred.lib</A></FONT></TH> |
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302 | </TR> |
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303 | </TABLE> |
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304 | |
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305 | <P> |
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306 | |
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307 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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308 | <TR BGCOLOR="#CCCCFF" CLASS="TableSubHeadingColor"> |
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309 | <TH ALIGN="left" COLSPAN="2">Classes in <A HREF="../../../../../org/apache/hadoop/mapred/lib/package-summary.html">org.apache.hadoop.mapred.lib</A> that implement <A HREF="../../../../../org/apache/hadoop/mapred/Reducer.html" title="interface in org.apache.hadoop.mapred">Reducer</A></FONT></TH> |
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310 | </TR> |
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311 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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312 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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313 | <CODE> class</CODE></FONT></TD> |
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314 | <TD><CODE><B><A HREF="../../../../../org/apache/hadoop/mapred/lib/ChainReducer.html" title="class in org.apache.hadoop.mapred.lib">ChainReducer</A></B></CODE> |
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315 | |
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316 | <BR> |
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317 | The ChainReducer class allows to chain multiple Mapper classes after a |
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318 | Reducer within the Reducer task.</TD> |
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319 | </TR> |
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320 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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321 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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322 | <CODE> class</CODE></FONT></TD> |
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323 | <TD><CODE><B><A HREF="../../../../../org/apache/hadoop/mapred/lib/FieldSelectionMapReduce.html" title="class in org.apache.hadoop.mapred.lib">FieldSelectionMapReduce<K,V></A></B></CODE> |
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324 | |
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325 | <BR> |
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326 | This class implements a mapper/reducer class that can be used to perform |
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327 | field selections in a manner similar to unix cut.</TD> |
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328 | </TR> |
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329 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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330 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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331 | <CODE> class</CODE></FONT></TD> |
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332 | <TD><CODE><B><A HREF="../../../../../org/apache/hadoop/mapred/lib/IdentityReducer.html" title="class in org.apache.hadoop.mapred.lib">IdentityReducer<K,V></A></B></CODE> |
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333 | |
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334 | <BR> |
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335 | <B>Deprecated.</B> <I>Use <A HREF="../../../../../org/apache/hadoop/mapreduce/Reducer.html" title="class in org.apache.hadoop.mapreduce"><CODE>Reducer</CODE></A> instead.</I></TD> |
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336 | </TR> |
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337 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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338 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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339 | <CODE> class</CODE></FONT></TD> |
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340 | <TD><CODE><B><A HREF="../../../../../org/apache/hadoop/mapred/lib/LongSumReducer.html" title="class in org.apache.hadoop.mapred.lib">LongSumReducer<K></A></B></CODE> |
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341 | |
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342 | <BR> |
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343 | <B>Deprecated.</B> <I>Use <A HREF="../../../../../org/apache/hadoop/mapreduce/lib/reduce/LongSumReducer.html" title="class in org.apache.hadoop.mapreduce.lib.reduce"><CODE>LongSumReducer</CODE></A> |
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344 | instead.</I></TD> |
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345 | </TR> |
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346 | </TABLE> |
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347 | |
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348 | <P> |
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349 | |
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350 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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351 | <TR BGCOLOR="#CCCCFF" CLASS="TableSubHeadingColor"> |
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352 | <TH ALIGN="left" COLSPAN="2">Method parameters in <A HREF="../../../../../org/apache/hadoop/mapred/lib/package-summary.html">org.apache.hadoop.mapred.lib</A> with type arguments of type <A HREF="../../../../../org/apache/hadoop/mapred/Reducer.html" title="interface in org.apache.hadoop.mapred">Reducer</A></FONT></TH> |
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353 | </TR> |
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354 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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355 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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356 | <CODE>static |
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357 | <TABLE BORDER="0" CELLPADDING="0" CELLSPACING="0" SUMMARY=""> |
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358 | <TR ALIGN="right" VALIGN=""> |
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359 | <TD NOWRAP><FONT SIZE="-1"> |
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360 | <CODE><K1,V1,K2,V2> |
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361 | <BR> |
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362 | void</CODE></FONT></TD> |
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363 | </TR> |
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364 | </TABLE> |
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365 | </CODE></FONT></TD> |
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366 | <TD><CODE><B>ChainReducer.</B><B><A HREF="../../../../../org/apache/hadoop/mapred/lib/ChainReducer.html#setReducer(org.apache.hadoop.mapred.JobConf, java.lang.Class, java.lang.Class, java.lang.Class, java.lang.Class, java.lang.Class, boolean, org.apache.hadoop.mapred.JobConf)">setReducer</A></B>(<A HREF="../../../../../org/apache/hadoop/mapred/JobConf.html" title="class in org.apache.hadoop.mapred">JobConf</A> job, |
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367 | <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A><? extends <A HREF="../../../../../org/apache/hadoop/mapred/Reducer.html" title="interface in org.apache.hadoop.mapred">Reducer</A><K1,V1,K2,V2>> klass, |
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368 | <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A><? extends K1> inputKeyClass, |
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369 | <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A><? extends V1> inputValueClass, |
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370 | <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A><? extends K2> outputKeyClass, |
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371 | <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A><? extends V2> outputValueClass, |
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372 | boolean byValue, |
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373 | <A HREF="../../../../../org/apache/hadoop/mapred/JobConf.html" title="class in org.apache.hadoop.mapred">JobConf</A> reducerConf)</CODE> |
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374 | |
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375 | <BR> |
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376 | Sets the Reducer class to the chain job's JobConf.</TD> |
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377 | </TR> |
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378 | </TABLE> |
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379 | |
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380 | <P> |
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381 | <A NAME="org.apache.hadoop.mapred.lib.aggregate"><!-- --></A> |
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382 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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383 | <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> |
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384 | <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> |
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385 | Uses of <A HREF="../../../../../org/apache/hadoop/mapred/Reducer.html" title="interface in org.apache.hadoop.mapred">Reducer</A> in <A HREF="../../../../../org/apache/hadoop/mapred/lib/aggregate/package-summary.html">org.apache.hadoop.mapred.lib.aggregate</A></FONT></TH> |
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386 | </TR> |
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387 | </TABLE> |
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388 | |
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389 | <P> |
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390 | |
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391 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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392 | <TR BGCOLOR="#CCCCFF" CLASS="TableSubHeadingColor"> |
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393 | <TH ALIGN="left" COLSPAN="2">Classes in <A HREF="../../../../../org/apache/hadoop/mapred/lib/aggregate/package-summary.html">org.apache.hadoop.mapred.lib.aggregate</A> that implement <A HREF="../../../../../org/apache/hadoop/mapred/Reducer.html" title="interface in org.apache.hadoop.mapred">Reducer</A></FONT></TH> |
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394 | </TR> |
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395 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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396 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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397 | <CODE> class</CODE></FONT></TD> |
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398 | <TD><CODE><B><A HREF="../../../../../org/apache/hadoop/mapred/lib/aggregate/ValueAggregatorCombiner.html" title="class in org.apache.hadoop.mapred.lib.aggregate">ValueAggregatorCombiner<K1 extends WritableComparable,V1 extends Writable></A></B></CODE> |
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399 | |
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400 | <BR> |
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401 | This class implements the generic combiner of Aggregate.</TD> |
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402 | </TR> |
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403 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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404 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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405 | <CODE> class</CODE></FONT></TD> |
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406 | <TD><CODE><B><A HREF="../../../../../org/apache/hadoop/mapred/lib/aggregate/ValueAggregatorJobBase.html" title="class in org.apache.hadoop.mapred.lib.aggregate">ValueAggregatorJobBase<K1 extends WritableComparable,V1 extends Writable></A></B></CODE> |
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407 | |
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408 | <BR> |
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409 | This abstract class implements some common functionalities of the |
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410 | the generic mapper, reducer and combiner classes of Aggregate.</TD> |
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411 | </TR> |
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412 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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413 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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414 | <CODE> class</CODE></FONT></TD> |
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415 | <TD><CODE><B><A HREF="../../../../../org/apache/hadoop/mapred/lib/aggregate/ValueAggregatorMapper.html" title="class in org.apache.hadoop.mapred.lib.aggregate">ValueAggregatorMapper<K1 extends WritableComparable,V1 extends Writable></A></B></CODE> |
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416 | |
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417 | <BR> |
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418 | This class implements the generic mapper of Aggregate.</TD> |
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419 | </TR> |
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420 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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421 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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422 | <CODE> class</CODE></FONT></TD> |
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423 | <TD><CODE><B><A HREF="../../../../../org/apache/hadoop/mapred/lib/aggregate/ValueAggregatorReducer.html" title="class in org.apache.hadoop.mapred.lib.aggregate">ValueAggregatorReducer<K1 extends WritableComparable,V1 extends Writable></A></B></CODE> |
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424 | |
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425 | <BR> |
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426 | This class implements the generic reducer of Aggregate.</TD> |
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427 | </TR> |
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428 | </TABLE> |
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429 | |
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430 | <P> |
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431 | <A NAME="org.apache.hadoop.streaming"><!-- --></A> |
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432 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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433 | <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> |
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434 | <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> |
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435 | Uses of <A HREF="../../../../../org/apache/hadoop/mapred/Reducer.html" title="interface in org.apache.hadoop.mapred">Reducer</A> in <A HREF="../../../../../org/apache/hadoop/streaming/package-summary.html">org.apache.hadoop.streaming</A></FONT></TH> |
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436 | </TR> |
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437 | </TABLE> |
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438 | |
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439 | <P> |
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440 | |
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441 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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442 | <TR BGCOLOR="#CCCCFF" CLASS="TableSubHeadingColor"> |
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443 | <TH ALIGN="left" COLSPAN="2">Classes in <A HREF="../../../../../org/apache/hadoop/streaming/package-summary.html">org.apache.hadoop.streaming</A> that implement <A HREF="../../../../../org/apache/hadoop/mapred/Reducer.html" title="interface in org.apache.hadoop.mapred">Reducer</A></FONT></TH> |
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444 | </TR> |
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445 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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446 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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447 | <CODE> class</CODE></FONT></TD> |
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448 | <TD><CODE><B><A HREF="../../../../../org/apache/hadoop/streaming/PipeReducer.html" title="class in org.apache.hadoop.streaming">PipeReducer</A></B></CODE> |
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449 | |
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450 | <BR> |
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451 | A generic Reducer bridge.</TD> |
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452 | </TR> |
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453 | </TABLE> |
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454 | |
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455 | <P> |
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456 | <HR> |
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