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7Uses of Interface org.apache.hadoop.io.RawComparator (Hadoop 0.20.1 API)
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83<H2>
84<B>Uses of Interface<br>org.apache.hadoop.io.RawComparator</B></H2>
85</CENTER>
86
87<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
88<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
89<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
90Packages that use <A HREF="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io">RawComparator</A></FONT></TH>
91</TR>
92<TR BGCOLOR="white" CLASS="TableRowColor">
93<TD><A HREF="#org.apache.hadoop.examples"><B>org.apache.hadoop.examples</B></A></TD>
94<TD>Hadoop example code.&nbsp;</TD>
95</TR>
96<TR BGCOLOR="white" CLASS="TableRowColor">
97<TD><A HREF="#org.apache.hadoop.io"><B>org.apache.hadoop.io</B></A></TD>
98<TD>Generic i/o code for use when reading and writing data to the network,
99to databases, and to files.&nbsp;</TD>
100</TR>
101<TR BGCOLOR="white" CLASS="TableRowColor">
102<TD><A HREF="#org.apache.hadoop.io.serializer"><B>org.apache.hadoop.io.serializer</B></A></TD>
103<TD>
104This package provides a mechanism for using different serialization frameworks
105in Hadoop.&nbsp;</TD>
106</TR>
107<TR BGCOLOR="white" CLASS="TableRowColor">
108<TD><A HREF="#org.apache.hadoop.mapred"><B>org.apache.hadoop.mapred</B></A></TD>
109<TD>A software framework for easily writing applications which process vast
110amounts of data (multi-terabyte data-sets) parallelly on large clusters
111(thousands of nodes) built of commodity hardware in a reliable, fault-tolerant
112manner.&nbsp;</TD>
113</TR>
114<TR BGCOLOR="white" CLASS="TableRowColor">
115<TD><A HREF="#org.apache.hadoop.mapred.lib"><B>org.apache.hadoop.mapred.lib</B></A></TD>
116<TD>Library of generally useful mappers, reducers, and partitioners.&nbsp;</TD>
117</TR>
118<TR BGCOLOR="white" CLASS="TableRowColor">
119<TD><A HREF="#org.apache.hadoop.mapreduce"><B>org.apache.hadoop.mapreduce</B></A></TD>
120<TD>&nbsp;&nbsp;</TD>
121</TR>
122<TR BGCOLOR="white" CLASS="TableRowColor">
123<TD><A HREF="#org.apache.hadoop.record"><B>org.apache.hadoop.record</B></A></TD>
124<TD>Hadoop record I/O contains classes and a record description language
125  translator for simplifying serialization and deserialization of records in a
126  language-neutral manner.&nbsp;</TD>
127</TR>
128</TABLE>
129&nbsp;
130<P>
131<A NAME="org.apache.hadoop.examples"><!-- --></A>
132<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
133<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
134<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
135Uses of <A HREF="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io">RawComparator</A> in <A HREF="../../../../../org/apache/hadoop/examples/package-summary.html">org.apache.hadoop.examples</A></FONT></TH>
136</TR>
137</TABLE>
138&nbsp;
139<P>
140
141<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
142<TR BGCOLOR="#CCCCFF" CLASS="TableSubHeadingColor">
143<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/io/RawComparator.html" title="interface in org.apache.hadoop.io">RawComparator</A></FONT></TH>
144</TR>
145<TR BGCOLOR="white" CLASS="TableRowColor">
146<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
147<CODE>static&nbsp;class</CODE></FONT></TD>
148<TD><CODE><B><A HREF="../../../../../org/apache/hadoop/examples/SecondarySort.FirstGroupingComparator.html" title="class in org.apache.hadoop.examples">SecondarySort.FirstGroupingComparator</A></B></CODE>
149
150<BR>
151&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Compare only the first part of the pair, so that reduce is called once
152 for each value of the first part.</TD>
153</TR>
154<TR BGCOLOR="white" CLASS="TableRowColor">
155<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
156<CODE>static&nbsp;class</CODE></FONT></TD>
157<TD><CODE><B><A HREF="../../../../../org/apache/hadoop/examples/SecondarySort.IntPair.Comparator.html" title="class in org.apache.hadoop.examples">SecondarySort.IntPair.Comparator</A></B></CODE>
158
159<BR>
160&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;A Comparator that compares serialized IntPair.</TD>
161</TR>
162</TABLE>
163&nbsp;
164<P>
165<A NAME="org.apache.hadoop.io"><!-- --></A>
166<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
167<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
168<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
169Uses of <A HREF="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io">RawComparator</A> in <A HREF="../../../../../org/apache/hadoop/io/package-summary.html">org.apache.hadoop.io</A></FONT></TH>
170</TR>
171</TABLE>
172&nbsp;
173<P>
174
175<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
176<TR BGCOLOR="#CCCCFF" CLASS="TableSubHeadingColor">
177<TH ALIGN="left" COLSPAN="2">Classes in <A HREF="../../../../../org/apache/hadoop/io/package-summary.html">org.apache.hadoop.io</A> that implement <A HREF="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io">RawComparator</A></FONT></TH>
178</TR>
179<TR BGCOLOR="white" CLASS="TableRowColor">
180<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
181<CODE>static&nbsp;class</CODE></FONT></TD>
182<TD><CODE><B><A HREF="../../../../../org/apache/hadoop/io/BooleanWritable.Comparator.html" title="class in org.apache.hadoop.io">BooleanWritable.Comparator</A></B></CODE>
183
184<BR>
185&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;A Comparator optimized for BooleanWritable.</TD>
186</TR>
187<TR BGCOLOR="white" CLASS="TableRowColor">
188<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
189<CODE>static&nbsp;class</CODE></FONT></TD>
190<TD><CODE><B><A HREF="../../../../../org/apache/hadoop/io/BytesWritable.Comparator.html" title="class in org.apache.hadoop.io">BytesWritable.Comparator</A></B></CODE>
191
192<BR>
193&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;A Comparator optimized for BytesWritable.</TD>
194</TR>
195<TR BGCOLOR="white" CLASS="TableRowColor">
196<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
197<CODE>static&nbsp;class</CODE></FONT></TD>
198<TD><CODE><B><A HREF="../../../../../org/apache/hadoop/io/ByteWritable.Comparator.html" title="class in org.apache.hadoop.io">ByteWritable.Comparator</A></B></CODE>
199
200<BR>
201&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;A Comparator optimized for ByteWritable.</TD>
202</TR>
203<TR BGCOLOR="white" CLASS="TableRowColor">
204<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
205<CODE>static&nbsp;class</CODE></FONT></TD>
206<TD><CODE><B><A HREF="../../../../../org/apache/hadoop/io/DoubleWritable.Comparator.html" title="class in org.apache.hadoop.io">DoubleWritable.Comparator</A></B></CODE>
207
208<BR>
209&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;A Comparator optimized for DoubleWritable.</TD>
210</TR>
211<TR BGCOLOR="white" CLASS="TableRowColor">
212<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
213<CODE>static&nbsp;class</CODE></FONT></TD>
214<TD><CODE><B><A HREF="../../../../../org/apache/hadoop/io/FloatWritable.Comparator.html" title="class in org.apache.hadoop.io">FloatWritable.Comparator</A></B></CODE>
215
216<BR>
217&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;A Comparator optimized for FloatWritable.</TD>
218</TR>
219<TR BGCOLOR="white" CLASS="TableRowColor">
220<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
221<CODE>static&nbsp;class</CODE></FONT></TD>
222<TD><CODE><B><A HREF="../../../../../org/apache/hadoop/io/IntWritable.Comparator.html" title="class in org.apache.hadoop.io">IntWritable.Comparator</A></B></CODE>
223
224<BR>
225&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;A Comparator optimized for IntWritable.</TD>
226</TR>
227<TR BGCOLOR="white" CLASS="TableRowColor">
228<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
229<CODE>static&nbsp;class</CODE></FONT></TD>
230<TD><CODE><B><A HREF="../../../../../org/apache/hadoop/io/LongWritable.Comparator.html" title="class in org.apache.hadoop.io">LongWritable.Comparator</A></B></CODE>
231
232<BR>
233&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;A Comparator optimized for LongWritable.</TD>
234</TR>
235<TR BGCOLOR="white" CLASS="TableRowColor">
236<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
237<CODE>static&nbsp;class</CODE></FONT></TD>
238<TD><CODE><B><A HREF="../../../../../org/apache/hadoop/io/LongWritable.DecreasingComparator.html" title="class in org.apache.hadoop.io">LongWritable.DecreasingComparator</A></B></CODE>
239
240<BR>
241&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;A decreasing Comparator optimized for LongWritable.</TD>
242</TR>
243<TR BGCOLOR="white" CLASS="TableRowColor">
244<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
245<CODE>static&nbsp;class</CODE></FONT></TD>
246<TD><CODE><B><A HREF="../../../../../org/apache/hadoop/io/MD5Hash.Comparator.html" title="class in org.apache.hadoop.io">MD5Hash.Comparator</A></B></CODE>
247
248<BR>
249&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;A WritableComparator optimized for MD5Hash keys.</TD>
250</TR>
251<TR BGCOLOR="white" CLASS="TableRowColor">
252<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
253<CODE>static&nbsp;class</CODE></FONT></TD>
254<TD><CODE><B><A HREF="../../../../../org/apache/hadoop/io/NullWritable.Comparator.html" title="class in org.apache.hadoop.io">NullWritable.Comparator</A></B></CODE>
255
256<BR>
257&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;A Comparator &quot;optimized&quot; for NullWritable.</TD>
258</TR>
259<TR BGCOLOR="white" CLASS="TableRowColor">
260<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
261<CODE>static&nbsp;class</CODE></FONT></TD>
262<TD><CODE><B><A HREF="../../../../../org/apache/hadoop/io/Text.Comparator.html" title="class in org.apache.hadoop.io">Text.Comparator</A></B></CODE>
263
264<BR>
265&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;A WritableComparator optimized for Text keys.</TD>
266</TR>
267<TR BGCOLOR="white" CLASS="TableRowColor">
268<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
269<CODE>static&nbsp;class</CODE></FONT></TD>
270<TD><CODE><B><A HREF="../../../../../org/apache/hadoop/io/UTF8.Comparator.html" title="class in org.apache.hadoop.io">UTF8.Comparator</A></B></CODE>
271
272<BR>
273&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B>Deprecated.</B>&nbsp;A WritableComparator optimized for UTF8 keys.</TD>
274</TR>
275<TR BGCOLOR="white" CLASS="TableRowColor">
276<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
277<CODE>&nbsp;class</CODE></FONT></TD>
278<TD><CODE><B><A HREF="../../../../../org/apache/hadoop/io/WritableComparator.html" title="class in org.apache.hadoop.io">WritableComparator</A></B></CODE>
279
280<BR>
281&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;A Comparator for <A HREF="../../../../../org/apache/hadoop/io/WritableComparable.html" title="interface in org.apache.hadoop.io"><CODE>WritableComparable</CODE></A>s.</TD>
282</TR>
283</TABLE>
284&nbsp;
285<P>
286
287<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
288<TR BGCOLOR="#CCCCFF" CLASS="TableSubHeadingColor">
289<TH ALIGN="left" COLSPAN="2">Constructors in <A HREF="../../../../../org/apache/hadoop/io/package-summary.html">org.apache.hadoop.io</A> with parameters of type <A HREF="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io">RawComparator</A></FONT></TH>
290</TR>
291<TR BGCOLOR="white" CLASS="TableRowColor">
292<TD><CODE><B><A HREF="../../../../../org/apache/hadoop/io/SequenceFile.Sorter.html#SequenceFile.Sorter(org.apache.hadoop.fs.FileSystem, org.apache.hadoop.io.RawComparator, java.lang.Class, java.lang.Class, org.apache.hadoop.conf.Configuration)">SequenceFile.Sorter</A></B>(<A HREF="../../../../../org/apache/hadoop/fs/FileSystem.html" title="class in org.apache.hadoop.fs">FileSystem</A>&nbsp;fs,
293                    <A HREF="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io">RawComparator</A>&nbsp;comparator,
294                    <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>&nbsp;keyClass,
295                    <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>&nbsp;valClass,
296                    <A HREF="../../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A>&nbsp;conf)</CODE>
297
298<BR>
299&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Sort and merge using an arbitrary <A HREF="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io"><CODE>RawComparator</CODE></A>.</TD>
300</TR>
301</TABLE>
302&nbsp;
303<P>
304<A NAME="org.apache.hadoop.io.serializer"><!-- --></A>
305<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
306<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
307<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
308Uses of <A HREF="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io">RawComparator</A> in <A HREF="../../../../../org/apache/hadoop/io/serializer/package-summary.html">org.apache.hadoop.io.serializer</A></FONT></TH>
309</TR>
310</TABLE>
311&nbsp;
312<P>
313
314<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
315<TR BGCOLOR="#CCCCFF" CLASS="TableSubHeadingColor">
316<TH ALIGN="left" COLSPAN="2">Classes in <A HREF="../../../../../org/apache/hadoop/io/serializer/package-summary.html">org.apache.hadoop.io.serializer</A> that implement <A HREF="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io">RawComparator</A></FONT></TH>
317</TR>
318<TR BGCOLOR="white" CLASS="TableRowColor">
319<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
320<CODE>&nbsp;class</CODE></FONT></TD>
321<TD><CODE><B><A HREF="../../../../../org/apache/hadoop/io/serializer/DeserializerComparator.html" title="class in org.apache.hadoop.io.serializer">DeserializerComparator&lt;T&gt;</A></B></CODE>
322
323<BR>
324&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
325 A <A HREF="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io"><CODE>RawComparator</CODE></A> that uses a <A HREF="../../../../../org/apache/hadoop/io/serializer/Deserializer.html" title="interface in org.apache.hadoop.io.serializer"><CODE>Deserializer</CODE></A> to deserialize
326 the objects to be compared so that the standard <A HREF="http://java.sun.com/javase/6/docs/api/java/util/Comparator.html?is-external=true" title="class or interface in java.util"><CODE>Comparator</CODE></A> can
327 be used to compare them.</TD>
328</TR>
329<TR BGCOLOR="white" CLASS="TableRowColor">
330<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
331<CODE>&nbsp;class</CODE></FONT></TD>
332<TD><CODE><B><A HREF="../../../../../org/apache/hadoop/io/serializer/JavaSerializationComparator.html" title="class in org.apache.hadoop.io.serializer">JavaSerializationComparator&lt;T extends Serializable & Comparable&lt;T&gt;&gt;</A></B></CODE>
333
334<BR>
335&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
336 A <A HREF="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io"><CODE>RawComparator</CODE></A> that uses a <A HREF="../../../../../org/apache/hadoop/io/serializer/JavaSerialization.html" title="class in org.apache.hadoop.io.serializer"><CODE>JavaSerialization</CODE></A>
337 <A HREF="../../../../../org/apache/hadoop/io/serializer/Deserializer.html" title="interface in org.apache.hadoop.io.serializer"><CODE>Deserializer</CODE></A> to deserialize objects that are then compared via
338 their <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Comparable.html?is-external=true" title="class or interface in java.lang"><CODE>Comparable</CODE></A> interfaces.</TD>
339</TR>
340</TABLE>
341&nbsp;
342<P>
343<A NAME="org.apache.hadoop.mapred"><!-- --></A>
344<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
345<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
346<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
347Uses of <A HREF="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io">RawComparator</A> in <A HREF="../../../../../org/apache/hadoop/mapred/package-summary.html">org.apache.hadoop.mapred</A></FONT></TH>
348</TR>
349</TABLE>
350&nbsp;
351<P>
352
353<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
354<TR BGCOLOR="#CCCCFF" CLASS="TableSubHeadingColor">
355<TH ALIGN="left" COLSPAN="2">Methods in <A HREF="../../../../../org/apache/hadoop/mapred/package-summary.html">org.apache.hadoop.mapred</A> that return <A HREF="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io">RawComparator</A></FONT></TH>
356</TR>
357<TR BGCOLOR="white" CLASS="TableRowColor">
358<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
359<CODE>&nbsp;<A HREF="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io">RawComparator</A></CODE></FONT></TD>
360<TD><CODE><B>JobConf.</B><B><A HREF="../../../../../org/apache/hadoop/mapred/JobConf.html#getOutputKeyComparator()">getOutputKeyComparator</A></B>()</CODE>
361
362<BR>
363&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B>Deprecated.</B>&nbsp;Get the <A HREF="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io"><CODE>RawComparator</CODE></A> comparator used to compare keys.</TD>
364</TR>
365<TR BGCOLOR="white" CLASS="TableRowColor">
366<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
367<CODE>&nbsp;<A HREF="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io">RawComparator</A></CODE></FONT></TD>
368<TD><CODE><B>JobConf.</B><B><A HREF="../../../../../org/apache/hadoop/mapred/JobConf.html#getOutputValueGroupingComparator()">getOutputValueGroupingComparator</A></B>()</CODE>
369
370<BR>
371&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B>Deprecated.</B>&nbsp;Get the user defined <A HREF="../../../../../org/apache/hadoop/io/WritableComparable.html" title="interface in org.apache.hadoop.io"><CODE>WritableComparable</CODE></A> comparator for
372 grouping keys of inputs to the reduce.</TD>
373</TR>
374</TABLE>
375&nbsp;
376<P>
377
378<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
379<TR BGCOLOR="#CCCCFF" CLASS="TableSubHeadingColor">
380<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/io/RawComparator.html" title="interface in org.apache.hadoop.io">RawComparator</A></FONT></TH>
381</TR>
382<TR BGCOLOR="white" CLASS="TableRowColor">
383<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
384<CODE>&nbsp;void</CODE></FONT></TD>
385<TD><CODE><B>JobConf.</B><B><A HREF="../../../../../org/apache/hadoop/mapred/JobConf.html#setOutputKeyComparatorClass(java.lang.Class)">setOutputKeyComparatorClass</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>&lt;? extends <A HREF="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io">RawComparator</A>&gt;&nbsp;theClass)</CODE>
386
387<BR>
388&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B>Deprecated.</B>&nbsp;Set the <A HREF="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io"><CODE>RawComparator</CODE></A> comparator used to compare keys.</TD>
389</TR>
390<TR BGCOLOR="white" CLASS="TableRowColor">
391<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
392<CODE>&nbsp;void</CODE></FONT></TD>
393<TD><CODE><B>JobConf.</B><B><A HREF="../../../../../org/apache/hadoop/mapred/JobConf.html#setOutputValueGroupingComparator(java.lang.Class)">setOutputValueGroupingComparator</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>&lt;? extends <A HREF="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io">RawComparator</A>&gt;&nbsp;theClass)</CODE>
394
395<BR>
396&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B>Deprecated.</B>&nbsp;Set the user defined <A HREF="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io"><CODE>RawComparator</CODE></A> comparator for
397 grouping keys in the input to the reduce.</TD>
398</TR>
399</TABLE>
400&nbsp;
401<P>
402<A NAME="org.apache.hadoop.mapred.lib"><!-- --></A>
403<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
404<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
405<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
406Uses of <A HREF="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io">RawComparator</A> in <A HREF="../../../../../org/apache/hadoop/mapred/lib/package-summary.html">org.apache.hadoop.mapred.lib</A></FONT></TH>
407</TR>
408</TABLE>
409&nbsp;
410<P>
411
412<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
413<TR BGCOLOR="#CCCCFF" CLASS="TableSubHeadingColor">
414<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/io/RawComparator.html" title="interface in org.apache.hadoop.io">RawComparator</A></FONT></TH>
415</TR>
416<TR BGCOLOR="white" CLASS="TableRowColor">
417<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
418<CODE>&nbsp;class</CODE></FONT></TD>
419<TD><CODE><B><A HREF="../../../../../org/apache/hadoop/mapred/lib/KeyFieldBasedComparator.html" title="class in org.apache.hadoop.mapred.lib">KeyFieldBasedComparator&lt;K,V&gt;</A></B></CODE>
420
421<BR>
422&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This comparator implementation provides a subset of the features provided
423 by the Unix/GNU Sort.</TD>
424</TR>
425</TABLE>
426&nbsp;
427<P>
428<A NAME="org.apache.hadoop.mapreduce"><!-- --></A>
429<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
430<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
431<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
432Uses of <A HREF="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io">RawComparator</A> in <A HREF="../../../../../org/apache/hadoop/mapreduce/package-summary.html">org.apache.hadoop.mapreduce</A></FONT></TH>
433</TR>
434</TABLE>
435&nbsp;
436<P>
437
438<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
439<TR BGCOLOR="#CCCCFF" CLASS="TableSubHeadingColor">
440<TH ALIGN="left" COLSPAN="2">Methods in <A HREF="../../../../../org/apache/hadoop/mapreduce/package-summary.html">org.apache.hadoop.mapreduce</A> that return <A HREF="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io">RawComparator</A></FONT></TH>
441</TR>
442<TR BGCOLOR="white" CLASS="TableRowColor">
443<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
444<CODE>&nbsp;<A HREF="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io">RawComparator</A>&lt;?&gt;</CODE></FONT></TD>
445<TD><CODE><B>JobContext.</B><B><A HREF="../../../../../org/apache/hadoop/mapreduce/JobContext.html#getGroupingComparator()">getGroupingComparator</A></B>()</CODE>
446
447<BR>
448&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Get the user defined <A HREF="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io"><CODE>RawComparator</CODE></A> comparator for
449 grouping keys of inputs to the reduce.</TD>
450</TR>
451<TR BGCOLOR="white" CLASS="TableRowColor">
452<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
453<CODE>&nbsp;<A HREF="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io">RawComparator</A>&lt;?&gt;</CODE></FONT></TD>
454<TD><CODE><B>JobContext.</B><B><A HREF="../../../../../org/apache/hadoop/mapreduce/JobContext.html#getSortComparator()">getSortComparator</A></B>()</CODE>
455
456<BR>
457&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Get the <A HREF="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io"><CODE>RawComparator</CODE></A> comparator used to compare keys.</TD>
458</TR>
459</TABLE>
460&nbsp;
461<P>
462
463<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
464<TR BGCOLOR="#CCCCFF" CLASS="TableSubHeadingColor">
465<TH ALIGN="left" COLSPAN="2">Method parameters in <A HREF="../../../../../org/apache/hadoop/mapreduce/package-summary.html">org.apache.hadoop.mapreduce</A> with type arguments of type <A HREF="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io">RawComparator</A></FONT></TH>
466</TR>
467<TR BGCOLOR="white" CLASS="TableRowColor">
468<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
469<CODE>&nbsp;void</CODE></FONT></TD>
470<TD><CODE><B>Job.</B><B><A HREF="../../../../../org/apache/hadoop/mapreduce/Job.html#setGroupingComparatorClass(java.lang.Class)">setGroupingComparatorClass</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>&lt;? extends <A HREF="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io">RawComparator</A>&gt;&nbsp;cls)</CODE>
471
472<BR>
473&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Define the comparator that controls which keys are grouped together
474 for a single call to
475 <A HREF="../../../../../org/apache/hadoop/mapreduce/Reducer.html#reduce(KEYIN, java.lang.Iterable, org.apache.hadoop.mapreduce.Reducer.Context)"><CODE>Reducer.reduce(Object, Iterable,
476                       org.apache.hadoop.mapreduce.Reducer.Context)</CODE></A></TD>
477</TR>
478<TR BGCOLOR="white" CLASS="TableRowColor">
479<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
480<CODE>&nbsp;void</CODE></FONT></TD>
481<TD><CODE><B>Job.</B><B><A HREF="../../../../../org/apache/hadoop/mapreduce/Job.html#setSortComparatorClass(java.lang.Class)">setSortComparatorClass</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>&lt;? extends <A HREF="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io">RawComparator</A>&gt;&nbsp;cls)</CODE>
482
483<BR>
484&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Define the comparator that controls how the keys are sorted before they
485 are passed to the <A HREF="../../../../../org/apache/hadoop/mapreduce/Reducer.html" title="class in org.apache.hadoop.mapreduce"><CODE>Reducer</CODE></A>.</TD>
486</TR>
487</TABLE>
488&nbsp;
489<P>
490
491<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
492<TR BGCOLOR="#CCCCFF" CLASS="TableSubHeadingColor">
493<TH ALIGN="left" COLSPAN="2">Constructors in <A HREF="../../../../../org/apache/hadoop/mapreduce/package-summary.html">org.apache.hadoop.mapreduce</A> with parameters of type <A HREF="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io">RawComparator</A></FONT></TH>
494</TR>
495<TR BGCOLOR="white" CLASS="TableRowColor">
496<TD><CODE><B><A HREF="../../../../../org/apache/hadoop/mapreduce/ReduceContext.html#ReduceContext(org.apache.hadoop.conf.Configuration, org.apache.hadoop.mapreduce.TaskAttemptID, org.apache.hadoop.mapred.RawKeyValueIterator, org.apache.hadoop.mapreduce.Counter, org.apache.hadoop.mapreduce.RecordWriter, org.apache.hadoop.mapreduce.OutputCommitter, org.apache.hadoop.mapreduce.StatusReporter, org.apache.hadoop.io.RawComparator, java.lang.Class, java.lang.Class)">ReduceContext</A></B>(<A HREF="../../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A>&nbsp;conf,
497              <A HREF="../../../../../org/apache/hadoop/mapreduce/TaskAttemptID.html" title="class in org.apache.hadoop.mapreduce">TaskAttemptID</A>&nbsp;taskid,
498              <A HREF="../../../../../org/apache/hadoop/mapred/RawKeyValueIterator.html" title="interface in org.apache.hadoop.mapred">RawKeyValueIterator</A>&nbsp;input,
499              <A HREF="../../../../../org/apache/hadoop/mapreduce/Counter.html" title="class in org.apache.hadoop.mapreduce">Counter</A>&nbsp;inputCounter,
500              <A HREF="../../../../../org/apache/hadoop/mapreduce/RecordWriter.html" title="class in org.apache.hadoop.mapreduce">RecordWriter</A>&lt;<A HREF="../../../../../org/apache/hadoop/mapreduce/ReduceContext.html" title="type parameter in ReduceContext">KEYOUT</A>,<A HREF="../../../../../org/apache/hadoop/mapreduce/ReduceContext.html" title="type parameter in ReduceContext">VALUEOUT</A>&gt;&nbsp;output,
501              <A HREF="../../../../../org/apache/hadoop/mapreduce/OutputCommitter.html" title="class in org.apache.hadoop.mapreduce">OutputCommitter</A>&nbsp;committer,
502              <A HREF="../../../../../org/apache/hadoop/mapreduce/StatusReporter.html" title="class in org.apache.hadoop.mapreduce">StatusReporter</A>&nbsp;reporter,
503              <A HREF="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io">RawComparator</A>&lt;<A HREF="../../../../../org/apache/hadoop/mapreduce/ReduceContext.html" title="type parameter in ReduceContext">KEYIN</A>&gt;&nbsp;comparator,
504              <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>&lt;<A HREF="../../../../../org/apache/hadoop/mapreduce/ReduceContext.html" title="type parameter in ReduceContext">KEYIN</A>&gt;&nbsp;keyClass,
505              <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>&lt;<A HREF="../../../../../org/apache/hadoop/mapreduce/ReduceContext.html" title="type parameter in ReduceContext">VALUEIN</A>&gt;&nbsp;valueClass)</CODE>
506
507<BR>
508&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
509</TR>
510<TR BGCOLOR="white" CLASS="TableRowColor">
511<TD><CODE><B><A HREF="../../../../../org/apache/hadoop/mapreduce/Reducer.Context.html#Reducer.Context(org.apache.hadoop.conf.Configuration, org.apache.hadoop.mapreduce.TaskAttemptID, org.apache.hadoop.mapred.RawKeyValueIterator, org.apache.hadoop.mapreduce.Counter, org.apache.hadoop.mapreduce.RecordWriter, org.apache.hadoop.mapreduce.OutputCommitter, org.apache.hadoop.mapreduce.StatusReporter, org.apache.hadoop.io.RawComparator, java.lang.Class, java.lang.Class)">Reducer.Context</A></B>(<A HREF="../../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A>&nbsp;conf,
512                <A HREF="../../../../../org/apache/hadoop/mapreduce/TaskAttemptID.html" title="class in org.apache.hadoop.mapreduce">TaskAttemptID</A>&nbsp;taskid,
513                <A HREF="../../../../../org/apache/hadoop/mapred/RawKeyValueIterator.html" title="interface in org.apache.hadoop.mapred">RawKeyValueIterator</A>&nbsp;input,
514                <A HREF="../../../../../org/apache/hadoop/mapreduce/Counter.html" title="class in org.apache.hadoop.mapreduce">Counter</A>&nbsp;inputCounter,
515                <A HREF="../../../../../org/apache/hadoop/mapreduce/RecordWriter.html" title="class in org.apache.hadoop.mapreduce">RecordWriter</A>&lt;<A HREF="../../../../../org/apache/hadoop/mapreduce/Reducer.html" title="type parameter in Reducer">KEYOUT</A>,<A HREF="../../../../../org/apache/hadoop/mapreduce/Reducer.html" title="type parameter in Reducer">VALUEOUT</A>&gt;&nbsp;output,
516                <A HREF="../../../../../org/apache/hadoop/mapreduce/OutputCommitter.html" title="class in org.apache.hadoop.mapreduce">OutputCommitter</A>&nbsp;committer,
517                <A HREF="../../../../../org/apache/hadoop/mapreduce/StatusReporter.html" title="class in org.apache.hadoop.mapreduce">StatusReporter</A>&nbsp;reporter,
518                <A HREF="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io">RawComparator</A>&lt;<A HREF="../../../../../org/apache/hadoop/mapreduce/Reducer.html" title="type parameter in Reducer">KEYIN</A>&gt;&nbsp;comparator,
519                <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>&lt;<A HREF="../../../../../org/apache/hadoop/mapreduce/Reducer.html" title="type parameter in Reducer">KEYIN</A>&gt;&nbsp;keyClass,
520                <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>&lt;<A HREF="../../../../../org/apache/hadoop/mapreduce/Reducer.html" title="type parameter in Reducer">VALUEIN</A>&gt;&nbsp;valueClass)</CODE>
521
522<BR>
523&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
524</TR>
525</TABLE>
526&nbsp;
527<P>
528<A NAME="org.apache.hadoop.record"><!-- --></A>
529<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
530<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
531<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
532Uses of <A HREF="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io">RawComparator</A> in <A HREF="../../../../../org/apache/hadoop/record/package-summary.html">org.apache.hadoop.record</A></FONT></TH>
533</TR>
534</TABLE>
535&nbsp;
536<P>
537
538<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
539<TR BGCOLOR="#CCCCFF" CLASS="TableSubHeadingColor">
540<TH ALIGN="left" COLSPAN="2">Classes in <A HREF="../../../../../org/apache/hadoop/record/package-summary.html">org.apache.hadoop.record</A> that implement <A HREF="../../../../../org/apache/hadoop/io/RawComparator.html" title="interface in org.apache.hadoop.io">RawComparator</A></FONT></TH>
541</TR>
542<TR BGCOLOR="white" CLASS="TableRowColor">
543<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
544<CODE>&nbsp;class</CODE></FONT></TD>
545<TD><CODE><B><A HREF="../../../../../org/apache/hadoop/record/RecordComparator.html" title="class in org.apache.hadoop.record">RecordComparator</A></B></CODE>
546
547<BR>
548&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;A raw record comparator base class</TD>
549</TR>
550</TABLE>
551&nbsp;
552<P>
553<HR>
554
555
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564  <TR ALIGN="center" VALIGN="top">
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