source: proiecte/HadoopJUnit/hadoop-0.20.1/docs/api/org/apache/hadoop/mapreduce/package-summary.html @ 120

Last change on this file since 120 was 120, checked in by (none), 14 years ago

Added the mail files for the Hadoop JUNit Project
  • Property svn:executable set to *
File size: 13.5 KB
Line 
1<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
2<!--NewPage-->
3<HTML>
4<HEAD>
5<!-- Generated by javadoc (build 1.6.0_07) on Tue Sep 01 20:57:00 UTC 2009 -->
6<TITLE>
7org.apache.hadoop.mapreduce (Hadoop 0.20.1 API)
8</TITLE>
9
10<META NAME="date" CONTENT="2009-09-01">
11
12<LINK REL ="stylesheet" TYPE="text/css" HREF="../../../../stylesheet.css" TITLE="Style">
13
14<SCRIPT type="text/javascript">
15function windowTitle()
16{
17    if (location.href.indexOf('is-external=true') == -1) {
18        parent.document.title="org.apache.hadoop.mapreduce (Hadoop 0.20.1 API)";
19    }
20}
21</SCRIPT>
22<NOSCRIPT>
23</NOSCRIPT>
24
25</HEAD>
26
27<BODY BGCOLOR="white" onload="windowTitle();">
28<HR>
29
30
31<!-- ========= START OF TOP NAVBAR ======= -->
32<A NAME="navbar_top"><!-- --></A>
33<A HREF="#skip-navbar_top" title="Skip navigation links"></A>
34<TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0" SUMMARY="">
35<TR>
36<TD COLSPAN=2 BGCOLOR="#EEEEFF" CLASS="NavBarCell1">
37<A NAME="navbar_top_firstrow"><!-- --></A>
38<TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3" SUMMARY="">
39  <TR ALIGN="center" VALIGN="top">
40  <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1">    <A HREF="../../../../overview-summary.html"><FONT CLASS="NavBarFont1"><B>Overview</B></FONT></A>&nbsp;</TD>
41  <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> &nbsp;<FONT CLASS="NavBarFont1Rev"><B>Package</B></FONT>&nbsp;</TD>
42  <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1">    <FONT CLASS="NavBarFont1">Class</FONT>&nbsp;</TD>
43  <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1">    <A HREF="package-use.html"><FONT CLASS="NavBarFont1"><B>Use</B></FONT></A>&nbsp;</TD>
44  <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1">    <A HREF="package-tree.html"><FONT CLASS="NavBarFont1"><B>Tree</B></FONT></A>&nbsp;</TD>
45  <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1">    <A HREF="../../../../deprecated-list.html"><FONT CLASS="NavBarFont1"><B>Deprecated</B></FONT></A>&nbsp;</TD>
46  <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1">    <A HREF="../../../../index-all.html"><FONT CLASS="NavBarFont1"><B>Index</B></FONT></A>&nbsp;</TD>
47  <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1">    <A HREF="../../../../help-doc.html"><FONT CLASS="NavBarFont1"><B>Help</B></FONT></A>&nbsp;</TD>
48  </TR>
49</TABLE>
50</TD>
51<TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM>
52</EM>
53</TD>
54</TR>
55
56<TR>
57<TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2">
58&nbsp;<A HREF="../../../../org/apache/hadoop/mapred/tools/package-summary.html"><B>PREV PACKAGE</B></A>&nbsp;
59&nbsp;<A HREF="../../../../org/apache/hadoop/mapreduce/lib/input/package-summary.html"><B>NEXT PACKAGE</B></A></FONT></TD>
60<TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2">
61  <A HREF="../../../../index.html?org/apache/hadoop/mapreduce/package-summary.html" target="_top"><B>FRAMES</B></A>  &nbsp;
62&nbsp;<A HREF="package-summary.html" target="_top"><B>NO FRAMES</B></A>  &nbsp;
63&nbsp;<SCRIPT type="text/javascript">
64  <!--
65  if(window==top) {
66    document.writeln('<A HREF="../../../../allclasses-noframe.html"><B>All Classes</B></A>');
67  }
68  //-->
69</SCRIPT>
70<NOSCRIPT>
71  <A HREF="../../../../allclasses-noframe.html"><B>All Classes</B></A>
72</NOSCRIPT>
73
74
75</FONT></TD>
76</TR>
77</TABLE>
78<A NAME="skip-navbar_top"></A>
79<!-- ========= END OF TOP NAVBAR ========= -->
80
81<HR>
82<H2>
83Package org.apache.hadoop.mapreduce
84</H2>
85
86<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
87<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
88<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
89<B>Class Summary</B></FONT></TH>
90</TR>
91<TR BGCOLOR="white" CLASS="TableRowColor">
92<TD WIDTH="15%"><B><A HREF="../../../../org/apache/hadoop/mapreduce/Counter.html" title="class in org.apache.hadoop.mapreduce">Counter</A></B></TD>
93<TD>A named counter that tracks the progress of a map/reduce job.</TD>
94</TR>
95<TR BGCOLOR="white" CLASS="TableRowColor">
96<TD WIDTH="15%"><B><A HREF="../../../../org/apache/hadoop/mapreduce/CounterGroup.html" title="class in org.apache.hadoop.mapreduce">CounterGroup</A></B></TD>
97<TD>A group of <A HREF="../../../../org/apache/hadoop/mapreduce/Counter.html" title="class in org.apache.hadoop.mapreduce"><CODE>Counter</CODE></A>s that logically belong together.</TD>
98</TR>
99<TR BGCOLOR="white" CLASS="TableRowColor">
100<TD WIDTH="15%"><B><A HREF="../../../../org/apache/hadoop/mapreduce/Counters.html" title="class in org.apache.hadoop.mapreduce">Counters</A></B></TD>
101<TD>&nbsp;</TD>
102</TR>
103<TR BGCOLOR="white" CLASS="TableRowColor">
104<TD WIDTH="15%"><B><A HREF="../../../../org/apache/hadoop/mapreduce/ID.html" title="class in org.apache.hadoop.mapreduce">ID</A></B></TD>
105<TD>A general identifier, which internally stores the id
106 as an integer.</TD>
107</TR>
108<TR BGCOLOR="white" CLASS="TableRowColor">
109<TD WIDTH="15%"><B><A HREF="../../../../org/apache/hadoop/mapreduce/InputFormat.html" title="class in org.apache.hadoop.mapreduce">InputFormat&lt;K,V&gt;</A></B></TD>
110<TD><code>InputFormat</code> describes the input-specification for a
111 Map-Reduce job.</TD>
112</TR>
113<TR BGCOLOR="white" CLASS="TableRowColor">
114<TD WIDTH="15%"><B><A HREF="../../../../org/apache/hadoop/mapreduce/InputSplit.html" title="class in org.apache.hadoop.mapreduce">InputSplit</A></B></TD>
115<TD><code>InputSplit</code> represents the data to be processed by an
116 individual <A HREF="../../../../org/apache/hadoop/mapreduce/Mapper.html" title="class in org.apache.hadoop.mapreduce"><CODE>Mapper</CODE></A>.</TD>
117</TR>
118<TR BGCOLOR="white" CLASS="TableRowColor">
119<TD WIDTH="15%"><B><A HREF="../../../../org/apache/hadoop/mapreduce/Job.html" title="class in org.apache.hadoop.mapreduce">Job</A></B></TD>
120<TD>The job submitter's view of the Job.</TD>
121</TR>
122<TR BGCOLOR="white" CLASS="TableRowColor">
123<TD WIDTH="15%"><B><A HREF="../../../../org/apache/hadoop/mapreduce/JobContext.html" title="class in org.apache.hadoop.mapreduce">JobContext</A></B></TD>
124<TD>A read-only view of the job that is provided to the tasks while they
125 are running.</TD>
126</TR>
127<TR BGCOLOR="white" CLASS="TableRowColor">
128<TD WIDTH="15%"><B><A HREF="../../../../org/apache/hadoop/mapreduce/JobID.html" title="class in org.apache.hadoop.mapreduce">JobID</A></B></TD>
129<TD>JobID represents the immutable and unique identifier for
130 the job.</TD>
131</TR>
132<TR BGCOLOR="white" CLASS="TableRowColor">
133<TD WIDTH="15%"><B><A HREF="../../../../org/apache/hadoop/mapreduce/MapContext.html" title="class in org.apache.hadoop.mapreduce">MapContext&lt;KEYIN,VALUEIN,KEYOUT,VALUEOUT&gt;</A></B></TD>
134<TD>The context that is given to the <A HREF="../../../../org/apache/hadoop/mapreduce/Mapper.html" title="class in org.apache.hadoop.mapreduce"><CODE>Mapper</CODE></A>.</TD>
135</TR>
136<TR BGCOLOR="white" CLASS="TableRowColor">
137<TD WIDTH="15%"><B><A HREF="../../../../org/apache/hadoop/mapreduce/Mapper.html" title="class in org.apache.hadoop.mapreduce">Mapper&lt;KEYIN,VALUEIN,KEYOUT,VALUEOUT&gt;</A></B></TD>
138<TD>Maps input key/value pairs to a set of intermediate key/value pairs.</TD>
139</TR>
140<TR BGCOLOR="white" CLASS="TableRowColor">
141<TD WIDTH="15%"><B><A HREF="../../../../org/apache/hadoop/mapreduce/OutputCommitter.html" title="class in org.apache.hadoop.mapreduce">OutputCommitter</A></B></TD>
142<TD><code>OutputCommitter</code> describes the commit of task output for a
143 Map-Reduce job.</TD>
144</TR>
145<TR BGCOLOR="white" CLASS="TableRowColor">
146<TD WIDTH="15%"><B><A HREF="../../../../org/apache/hadoop/mapreduce/OutputFormat.html" title="class in org.apache.hadoop.mapreduce">OutputFormat&lt;K,V&gt;</A></B></TD>
147<TD><code>OutputFormat</code> describes the output-specification for a
148 Map-Reduce job.</TD>
149</TR>
150<TR BGCOLOR="white" CLASS="TableRowColor">
151<TD WIDTH="15%"><B><A HREF="../../../../org/apache/hadoop/mapreduce/Partitioner.html" title="class in org.apache.hadoop.mapreduce">Partitioner&lt;KEY,VALUE&gt;</A></B></TD>
152<TD>Partitions the key space.</TD>
153</TR>
154<TR BGCOLOR="white" CLASS="TableRowColor">
155<TD WIDTH="15%"><B><A HREF="../../../../org/apache/hadoop/mapreduce/RecordReader.html" title="class in org.apache.hadoop.mapreduce">RecordReader&lt;KEYIN,VALUEIN&gt;</A></B></TD>
156<TD>The record reader breaks the data into key/value pairs for input to the
157 <A HREF="../../../../org/apache/hadoop/mapreduce/Mapper.html" title="class in org.apache.hadoop.mapreduce"><CODE>Mapper</CODE></A>.</TD>
158</TR>
159<TR BGCOLOR="white" CLASS="TableRowColor">
160<TD WIDTH="15%"><B><A HREF="../../../../org/apache/hadoop/mapreduce/RecordWriter.html" title="class in org.apache.hadoop.mapreduce">RecordWriter&lt;K,V&gt;</A></B></TD>
161<TD><code>RecordWriter</code> writes the output &lt;key, value&gt; pairs
162 to an output file.</TD>
163</TR>
164<TR BGCOLOR="white" CLASS="TableRowColor">
165<TD WIDTH="15%"><B><A HREF="../../../../org/apache/hadoop/mapreduce/ReduceContext.html" title="class in org.apache.hadoop.mapreduce">ReduceContext&lt;KEYIN,VALUEIN,KEYOUT,VALUEOUT&gt;</A></B></TD>
166<TD>The context passed to the <A HREF="../../../../org/apache/hadoop/mapreduce/Reducer.html" title="class in org.apache.hadoop.mapreduce"><CODE>Reducer</CODE></A>.</TD>
167</TR>
168<TR BGCOLOR="white" CLASS="TableRowColor">
169<TD WIDTH="15%"><B><A HREF="../../../../org/apache/hadoop/mapreduce/Reducer.html" title="class in org.apache.hadoop.mapreduce">Reducer&lt;KEYIN,VALUEIN,KEYOUT,VALUEOUT&gt;</A></B></TD>
170<TD>Reduces a set of intermediate values which share a key to a smaller set of
171 values.</TD>
172</TR>
173<TR BGCOLOR="white" CLASS="TableRowColor">
174<TD WIDTH="15%"><B><A HREF="../../../../org/apache/hadoop/mapreduce/StatusReporter.html" title="class in org.apache.hadoop.mapreduce">StatusReporter</A></B></TD>
175<TD>&nbsp;</TD>
176</TR>
177<TR BGCOLOR="white" CLASS="TableRowColor">
178<TD WIDTH="15%"><B><A HREF="../../../../org/apache/hadoop/mapreduce/TaskAttemptContext.html" title="class in org.apache.hadoop.mapreduce">TaskAttemptContext</A></B></TD>
179<TD>The context for task attempts.</TD>
180</TR>
181<TR BGCOLOR="white" CLASS="TableRowColor">
182<TD WIDTH="15%"><B><A HREF="../../../../org/apache/hadoop/mapreduce/TaskAttemptID.html" title="class in org.apache.hadoop.mapreduce">TaskAttemptID</A></B></TD>
183<TD>TaskAttemptID represents the immutable and unique identifier for
184 a task attempt.</TD>
185</TR>
186<TR BGCOLOR="white" CLASS="TableRowColor">
187<TD WIDTH="15%"><B><A HREF="../../../../org/apache/hadoop/mapreduce/TaskID.html" title="class in org.apache.hadoop.mapreduce">TaskID</A></B></TD>
188<TD>TaskID represents the immutable and unique identifier for
189 a Map or Reduce Task.</TD>
190</TR>
191<TR BGCOLOR="white" CLASS="TableRowColor">
192<TD WIDTH="15%"><B><A HREF="../../../../org/apache/hadoop/mapreduce/TaskInputOutputContext.html" title="class in org.apache.hadoop.mapreduce">TaskInputOutputContext&lt;KEYIN,VALUEIN,KEYOUT,VALUEOUT&gt;</A></B></TD>
193<TD>A context object that allows input and output from the task.</TD>
194</TR>
195</TABLE>
196&nbsp;
197
198<P>
199
200<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
201<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
202<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
203<B>Enum Summary</B></FONT></TH>
204</TR>
205<TR BGCOLOR="white" CLASS="TableRowColor">
206<TD WIDTH="15%"><B><A HREF="../../../../org/apache/hadoop/mapreduce/Job.JobState.html" title="enum in org.apache.hadoop.mapreduce">Job.JobState</A></B></TD>
207<TD>&nbsp;</TD>
208</TR>
209</TABLE>
210&nbsp;
211
212<P>
213<DL>
214</DL>
215<HR>
216
217
218<!-- ======= START OF BOTTOM NAVBAR ====== -->
219<A NAME="navbar_bottom"><!-- --></A>
220<A HREF="#skip-navbar_bottom" title="Skip navigation links"></A>
221<TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0" SUMMARY="">
222<TR>
223<TD COLSPAN=2 BGCOLOR="#EEEEFF" CLASS="NavBarCell1">
224<A NAME="navbar_bottom_firstrow"><!-- --></A>
225<TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3" SUMMARY="">
226  <TR ALIGN="center" VALIGN="top">
227  <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1">    <A HREF="../../../../overview-summary.html"><FONT CLASS="NavBarFont1"><B>Overview</B></FONT></A>&nbsp;</TD>
228  <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> &nbsp;<FONT CLASS="NavBarFont1Rev"><B>Package</B></FONT>&nbsp;</TD>
229  <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1">    <FONT CLASS="NavBarFont1">Class</FONT>&nbsp;</TD>
230  <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1">    <A HREF="package-use.html"><FONT CLASS="NavBarFont1"><B>Use</B></FONT></A>&nbsp;</TD>
231  <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1">    <A HREF="package-tree.html"><FONT CLASS="NavBarFont1"><B>Tree</B></FONT></A>&nbsp;</TD>
232  <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1">    <A HREF="../../../../deprecated-list.html"><FONT CLASS="NavBarFont1"><B>Deprecated</B></FONT></A>&nbsp;</TD>
233  <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1">    <A HREF="../../../../index-all.html"><FONT CLASS="NavBarFont1"><B>Index</B></FONT></A>&nbsp;</TD>
234  <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1">    <A HREF="../../../../help-doc.html"><FONT CLASS="NavBarFont1"><B>Help</B></FONT></A>&nbsp;</TD>
235  </TR>
236</TABLE>
237</TD>
238<TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM>
239</EM>
240</TD>
241</TR>
242
243<TR>
244<TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2">
245&nbsp;<A HREF="../../../../org/apache/hadoop/mapred/tools/package-summary.html"><B>PREV PACKAGE</B></A>&nbsp;
246&nbsp;<A HREF="../../../../org/apache/hadoop/mapreduce/lib/input/package-summary.html"><B>NEXT PACKAGE</B></A></FONT></TD>
247<TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2">
248  <A HREF="../../../../index.html?org/apache/hadoop/mapreduce/package-summary.html" target="_top"><B>FRAMES</B></A>  &nbsp;
249&nbsp;<A HREF="package-summary.html" target="_top"><B>NO FRAMES</B></A>  &nbsp;
250&nbsp;<SCRIPT type="text/javascript">
251  <!--
252  if(window==top) {
253    document.writeln('<A HREF="../../../../allclasses-noframe.html"><B>All Classes</B></A>');
254  }
255  //-->
256</SCRIPT>
257<NOSCRIPT>
258  <A HREF="../../../../allclasses-noframe.html"><B>All Classes</B></A>
259</NOSCRIPT>
260
261
262</FONT></TD>
263</TR>
264</TABLE>
265<A NAME="skip-navbar_bottom"></A>
266<!-- ======== END OF BOTTOM NAVBAR ======= -->
267
268<HR>
269Copyright &copy; 2009 The Apache Software Foundation
270</BODY>
271</HTML>
Note: See TracBrowser for help on using the repository browser.