Changes between Version 4 and Version 5 of jazz/Hadoop_Lab2

Timestamp:

Mar 24, 2009, 11:43:25 AM (17 years ago)

Author:

waue

Comment:

--

jazz/Hadoop_Lab2

@@ -24 +24 @@
  === 2.3 更多運算命令 ===
  
+ 可執行的指令一覽表：
+ 
+ || aggregatewordcount: ||  An Aggregate based map/reduce program that counts the words in the input files. || 
+
+ ||  aggregatewordhist:  || An Aggregate based map/reduce program that computes the histogram of the words in the input files. || 
+
+ || grep: ||  A map/reduce program that counts the matches of a regex in the input. || 
+
+ ||  join:  || A job that effects a join over sorted, equally partitioned datasets || 
+
+ || multifilewc: ||  A job that counts words from several files. || 
+
+ || pentomino:  || A map/reduce tile laying program to find solutions to pentomino problems. || 
+
+ || pi: ||  A map/reduce program that estimates Pi using monte-carlo method. || 
+
+ || randomtextwriter: ||  A map/reduce program that writes 10GB of random textual data per node. || 
+
+ || randomwriter:  || A map/reduce program that writes 10GB of random data per node. || 
+
+ || sleep: ||  A job that sleeps at each map and reduce task. || 
+
+ || sort:  || A map/reduce program that sorts the data written by the random writer. || 
+
+ ||  sudoku: ||  A sudoku solver. || 
+
+ || wordcount:  || A map/reduce program that counts the words in the input files. || 
+
+
+ 
+ 
  請參考 [http://hadoop.apache.org/core/docs/current/api/org/apache/hadoop/examples/package-summary.html org.apache.hadoop.examples]
  
- 
+
  
 {{{
@@ -38 +69 @@
 <b>Class Summary</b></font></th>
 </tr>
+
 <tr class="TableRowColor" bgcolor="white">
 <td width="15%"><b><a href="http://hadoop.apache.org/core/docs/current/api/org/apache/hadoop/examples/AggregateWordCount.html" title="class in org.apache.hadoop.examples">AggregateWordCount</a></b></td>
 
-<td>This is an example Aggregated Hadoop Map/Reduce application.</td>
+<td>This is an example Aggregated Hadoop Map/Reduce application. It reads the text input files, breaks each line into words and counts them. The output is a locally sorted list of words and the count of how often they occurred. To run: bin/hadoop jar hadoop-*-examples.jar aggregatewordcount in-dir  out-dir numOfReducers textinputformat </td>
 </tr>
 
 <tr class="TableRowColor" bgcolor="white">
 <td width="15%"><b><a href="http://hadoop.apache.org/core/docs/current/api/org/apache/hadoop/examples/AggregateWordHistogram.html" title="class in org.apache.hadoop.examples">AggregateWordHistogram</a></b></td>
-<td>This is an example Aggregated Hadoop Map/Reduce application.</td>
+<td>This is an example Aggregated Hadoop Map/Reduce application. Computes the histogram of the words in the input texts. To run: bin/hadoop jar hadoop-*-examples.jar aggregatewordhist in-dir  out-dir numOfReducers textinputformat </td>
+</tr>
 
-</tr>
-<tr class="TableRowColor" bgcolor="white">
-<td width="15%"><b><a href="http://hadoop.apache.org/core/docs/current/api/org/apache/hadoop/examples/DBCountPageView.html" title="class in org.apache.hadoop.examples">DBCountPageView</a></b></td>
-<td>This is a demonstrative program, which uses DBInputFormat for reading
- the input data from a database, and DBOutputFormat for writing the data 
- to the database.</td>
-</tr>
 <tr class="TableRowColor" bgcolor="white">
 <td width="15%"><b><a href="http://hadoop.apache.org/core/docs/current/api/org/apache/hadoop/examples/ExampleDriver.html" title="class in org.apache.hadoop.examples">ExampleDriver</a></b></td>