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91 | org.apache.hadoop.mapred.lib</FONT> |
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92 | <BR> |
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93 | Class InputSampler<K,V></H2> |
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94 | <PRE> |
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95 | <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</A> |
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96 | <IMG SRC="../../../../../resources/inherit.gif" ALT="extended by "><B>org.apache.hadoop.mapred.lib.InputSampler<K,V></B> |
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97 | </PRE> |
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98 | <DL> |
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99 | <DT><B>All Implemented Interfaces:</B> <DD><A HREF="../../../../../org/apache/hadoop/conf/Configurable.html" title="interface in org.apache.hadoop.conf">Configurable</A>, <A HREF="../../../../../org/apache/hadoop/util/Tool.html" title="interface in org.apache.hadoop.util">Tool</A></DD> |
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100 | </DL> |
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101 | <HR> |
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102 | <DL> |
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103 | <DT><PRE>public class <B>InputSampler<K,V></B><DT>extends <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A><DT>implements <A HREF="../../../../../org/apache/hadoop/util/Tool.html" title="interface in org.apache.hadoop.util">Tool</A></DL> |
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104 | </PRE> |
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105 | |
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106 | <P> |
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107 | Utility for collecting samples and writing a partition file for |
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108 | <A HREF="../../../../../org/apache/hadoop/mapred/lib/TotalOrderPartitioner.html" title="class in org.apache.hadoop.mapred.lib"><CODE>TotalOrderPartitioner</CODE></A>. |
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109 | <P> |
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124 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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125 | <CODE>static class</CODE></FONT></TD> |
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126 | <TD><CODE><B><A HREF="../../../../../org/apache/hadoop/mapred/lib/InputSampler.IntervalSampler.html" title="class in org.apache.hadoop.mapred.lib">InputSampler.IntervalSampler</A><<A HREF="../../../../../org/apache/hadoop/mapred/lib/InputSampler.IntervalSampler.html" title="type parameter in InputSampler.IntervalSampler">K</A>,<A HREF="../../../../../org/apache/hadoop/mapred/lib/InputSampler.IntervalSampler.html" title="type parameter in InputSampler.IntervalSampler">V</A>></B></CODE> |
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127 | |
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128 | <BR> |
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129 | Sample from s splits at regular intervals.</TD> |
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130 | </TR> |
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131 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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132 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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133 | <CODE>static class</CODE></FONT></TD> |
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134 | <TD><CODE><B><A HREF="../../../../../org/apache/hadoop/mapred/lib/InputSampler.RandomSampler.html" title="class in org.apache.hadoop.mapred.lib">InputSampler.RandomSampler</A><<A HREF="../../../../../org/apache/hadoop/mapred/lib/InputSampler.RandomSampler.html" title="type parameter in InputSampler.RandomSampler">K</A>,<A HREF="../../../../../org/apache/hadoop/mapred/lib/InputSampler.RandomSampler.html" title="type parameter in InputSampler.RandomSampler">V</A>></B></CODE> |
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135 | |
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136 | <BR> |
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137 | Sample from random points in the input.</TD> |
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138 | </TR> |
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139 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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140 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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141 | <CODE>static interface</CODE></FONT></TD> |
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142 | <TD><CODE><B><A HREF="../../../../../org/apache/hadoop/mapred/lib/InputSampler.Sampler.html" title="interface in org.apache.hadoop.mapred.lib">InputSampler.Sampler</A><<A HREF="../../../../../org/apache/hadoop/mapred/lib/InputSampler.Sampler.html" title="type parameter in InputSampler.Sampler">K</A>,<A HREF="../../../../../org/apache/hadoop/mapred/lib/InputSampler.Sampler.html" title="type parameter in InputSampler.Sampler">V</A>></B></CODE> |
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143 | |
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144 | <BR> |
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145 | Interface to sample using an <A HREF="../../../../../org/apache/hadoop/mapred/InputFormat.html" title="interface in org.apache.hadoop.mapred"><CODE>InputFormat</CODE></A>.</TD> |
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146 | </TR> |
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147 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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148 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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149 | <CODE>static class</CODE></FONT></TD> |
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150 | <TD><CODE><B><A HREF="../../../../../org/apache/hadoop/mapred/lib/InputSampler.SplitSampler.html" title="class in org.apache.hadoop.mapred.lib">InputSampler.SplitSampler</A><<A HREF="../../../../../org/apache/hadoop/mapred/lib/InputSampler.SplitSampler.html" title="type parameter in InputSampler.SplitSampler">K</A>,<A HREF="../../../../../org/apache/hadoop/mapred/lib/InputSampler.SplitSampler.html" title="type parameter in InputSampler.SplitSampler">V</A>></B></CODE> |
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151 | |
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152 | <BR> |
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153 | Samples the first n records from s splits.</TD> |
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154 | </TR> |
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155 | </TABLE> |
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156 | |
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157 | <!-- ======== CONSTRUCTOR SUMMARY ======== --> |
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158 | |
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163 | <B>Constructor Summary</B></FONT></TH> |
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164 | </TR> |
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165 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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166 | <TD><CODE><B><A HREF="../../../../../org/apache/hadoop/mapred/lib/InputSampler.html#InputSampler(org.apache.hadoop.mapred.JobConf)">InputSampler</A></B>(<A HREF="../../../../../org/apache/hadoop/mapred/JobConf.html" title="class in org.apache.hadoop.mapred">JobConf</A> conf)</CODE> |
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167 | |
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168 | <BR> |
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172 | |
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182 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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183 | <CODE> <A HREF="../../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A></CODE></FONT></TD> |
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184 | <TD><CODE><B><A HREF="../../../../../org/apache/hadoop/mapred/lib/InputSampler.html#getConf()">getConf</A></B>()</CODE> |
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185 | |
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186 | <BR> |
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187 | Return the configuration used by this object.</TD> |
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188 | </TR> |
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189 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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190 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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191 | <CODE>static void</CODE></FONT></TD> |
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192 | <TD><CODE><B><A HREF="../../../../../org/apache/hadoop/mapred/lib/InputSampler.html#main(java.lang.String[])">main</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A>[] args)</CODE> |
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193 | |
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194 | <BR> |
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196 | </TR> |
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197 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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198 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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199 | <CODE> int</CODE></FONT></TD> |
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200 | <TD><CODE><B><A HREF="../../../../../org/apache/hadoop/mapred/lib/InputSampler.html#run(java.lang.String[])">run</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A>[] args)</CODE> |
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201 | |
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202 | <BR> |
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203 | Driver for InputSampler from the command line.</TD> |
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204 | </TR> |
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205 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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206 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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207 | <CODE> void</CODE></FONT></TD> |
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208 | <TD><CODE><B><A HREF="../../../../../org/apache/hadoop/mapred/lib/InputSampler.html#setConf(org.apache.hadoop.conf.Configuration)">setConf</A></B>(<A HREF="../../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf)</CODE> |
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209 | |
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210 | <BR> |
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211 | Set the configuration to be used by this object.</TD> |
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212 | </TR> |
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213 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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214 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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215 | <CODE>static |
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216 | <TABLE BORDER="0" CELLPADDING="0" CELLSPACING="0" SUMMARY=""> |
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217 | <TR ALIGN="right" VALIGN=""> |
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218 | <TD NOWRAP><FONT SIZE="-1"> |
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219 | <CODE><K,V> void</CODE></FONT></TD> |
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220 | </TR> |
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221 | </TABLE> |
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222 | </CODE></FONT></TD> |
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223 | <TD><CODE><B><A HREF="../../../../../org/apache/hadoop/mapred/lib/InputSampler.html#writePartitionFile(org.apache.hadoop.mapred.JobConf, org.apache.hadoop.mapred.lib.InputSampler.Sampler)">writePartitionFile</A></B>(<A HREF="../../../../../org/apache/hadoop/mapred/JobConf.html" title="class in org.apache.hadoop.mapred">JobConf</A> job, |
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224 | <A HREF="../../../../../org/apache/hadoop/mapred/lib/InputSampler.Sampler.html" title="interface in org.apache.hadoop.mapred.lib">InputSampler.Sampler</A><K,V> sampler)</CODE> |
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225 | |
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226 | <BR> |
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227 | Write a partition file for the given job, using the Sampler provided.</TD> |
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228 | </TR> |
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229 | </TABLE> |
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230 | <A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A> |
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231 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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232 | <TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"> |
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233 | <TH ALIGN="left"><B>Methods inherited from class java.lang.<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A></B></TH> |
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237 | </TR> |
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238 | </TABLE> |
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239 | |
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240 | <P> |
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241 | |
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242 | <!-- ========= CONSTRUCTOR DETAIL ======== --> |
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243 | |
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244 | <A NAME="constructor_detail"><!-- --></A> |
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245 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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246 | <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> |
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247 | <TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2"> |
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248 | <B>Constructor Detail</B></FONT></TH> |
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249 | </TR> |
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250 | </TABLE> |
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251 | |
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252 | <A NAME="InputSampler(org.apache.hadoop.mapred.JobConf)"><!-- --></A><H3> |
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253 | InputSampler</H3> |
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254 | <PRE> |
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255 | public <B>InputSampler</B>(<A HREF="../../../../../org/apache/hadoop/mapred/JobConf.html" title="class in org.apache.hadoop.mapred">JobConf</A> conf)</PRE> |
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256 | <DL> |
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257 | </DL> |
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259 | <!-- ============ METHOD DETAIL ========== --> |
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260 | |
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261 | <A NAME="method_detail"><!-- --></A> |
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263 | <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> |
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264 | <TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2"> |
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265 | <B>Method Detail</B></FONT></TH> |
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266 | </TR> |
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267 | </TABLE> |
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268 | |
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269 | <A NAME="getConf()"><!-- --></A><H3> |
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270 | getConf</H3> |
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271 | <PRE> |
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272 | public <A HREF="../../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> <B>getConf</B>()</PRE> |
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273 | <DL> |
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274 | <DD><B>Description copied from interface: <CODE><A HREF="../../../../../org/apache/hadoop/conf/Configurable.html#getConf()">Configurable</A></CODE></B></DD> |
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275 | <DD>Return the configuration used by this object. |
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276 | <P> |
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277 | <DD><DL> |
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278 | <DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../org/apache/hadoop/conf/Configurable.html#getConf()">getConf</A></CODE> in interface <CODE><A HREF="../../../../../org/apache/hadoop/conf/Configurable.html" title="interface in org.apache.hadoop.conf">Configurable</A></CODE></DL> |
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279 | </DD> |
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280 | <DD><DL> |
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281 | </DL> |
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282 | </DD> |
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283 | </DL> |
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284 | <HR> |
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285 | |
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286 | <A NAME="setConf(org.apache.hadoop.conf.Configuration)"><!-- --></A><H3> |
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287 | setConf</H3> |
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288 | <PRE> |
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289 | public void <B>setConf</B>(<A HREF="../../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf)</PRE> |
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290 | <DL> |
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291 | <DD><B>Description copied from interface: <CODE><A HREF="../../../../../org/apache/hadoop/conf/Configurable.html#setConf(org.apache.hadoop.conf.Configuration)">Configurable</A></CODE></B></DD> |
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292 | <DD>Set the configuration to be used by this object. |
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293 | <P> |
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294 | <DD><DL> |
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295 | <DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../org/apache/hadoop/conf/Configurable.html#setConf(org.apache.hadoop.conf.Configuration)">setConf</A></CODE> in interface <CODE><A HREF="../../../../../org/apache/hadoop/conf/Configurable.html" title="interface in org.apache.hadoop.conf">Configurable</A></CODE></DL> |
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296 | </DD> |
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297 | <DD><DL> |
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298 | </DL> |
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299 | </DD> |
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300 | </DL> |
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301 | <HR> |
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302 | |
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303 | <A NAME="writePartitionFile(org.apache.hadoop.mapred.JobConf, org.apache.hadoop.mapred.lib.InputSampler.Sampler)"><!-- --></A><H3> |
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304 | writePartitionFile</H3> |
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305 | <PRE> |
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306 | public static <K,V> void <B>writePartitionFile</B>(<A HREF="../../../../../org/apache/hadoop/mapred/JobConf.html" title="class in org.apache.hadoop.mapred">JobConf</A> job, |
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307 | <A HREF="../../../../../org/apache/hadoop/mapred/lib/InputSampler.Sampler.html" title="interface in org.apache.hadoop.mapred.lib">InputSampler.Sampler</A><K,V> sampler) |
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308 | throws <A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE> |
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309 | <DL> |
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310 | <DD>Write a partition file for the given job, using the Sampler provided. |
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311 | Queries the sampler for a sample keyset, sorts by the output key |
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312 | comparator, selects the keys for each rank, and writes to the destination |
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313 | returned from <A HREF="../../../../../org/apache/hadoop/mapred/lib/TotalOrderPartitioner.html#getPartitionFile(org.apache.hadoop.mapred.JobConf)"><CODE>TotalOrderPartitioner.getPartitionFile(org.apache.hadoop.mapred.JobConf)</CODE></A>. |
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314 | <P> |
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315 | <DD><DL> |
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316 | </DL> |
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317 | </DD> |
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318 | <DD><DL> |
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319 | |
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320 | <DT><B>Throws:</B> |
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321 | <DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL> |
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322 | </DD> |
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323 | </DL> |
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324 | <HR> |
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325 | |
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326 | <A NAME="run(java.lang.String[])"><!-- --></A><H3> |
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327 | run</H3> |
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328 | <PRE> |
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329 | public int <B>run</B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A>[] args) |
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330 | throws <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</A></PRE> |
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331 | <DL> |
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332 | <DD>Driver for InputSampler from the command line. |
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333 | Configures a JobConf instance and calls <A HREF="../../../../../org/apache/hadoop/mapred/lib/InputSampler.html#writePartitionFile(org.apache.hadoop.mapred.JobConf, org.apache.hadoop.mapred.lib.InputSampler.Sampler)"><CODE>writePartitionFile(org.apache.hadoop.mapred.JobConf, org.apache.hadoop.mapred.lib.InputSampler.Sampler<K, V>)</CODE></A>. |
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334 | <P> |
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335 | <DD><DL> |
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336 | <DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../org/apache/hadoop/util/Tool.html#run(java.lang.String[])">run</A></CODE> in interface <CODE><A HREF="../../../../../org/apache/hadoop/util/Tool.html" title="interface in org.apache.hadoop.util">Tool</A></CODE></DL> |
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337 | </DD> |
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338 | <DD><DL> |
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339 | <DT><B>Parameters:</B><DD><CODE>args</CODE> - command specific arguments. |
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340 | <DT><B>Returns:</B><DD>exit code. |
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341 | <DT><B>Throws:</B> |
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342 | <DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</A></CODE></DL> |
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348 | main</H3> |
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350 | public static void <B>main</B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A>[] args) |
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354 | </DL> |
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356 | <DD><DL> |
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357 | |
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