Changes between Initial Version and Version 1 of NCTU110329/Lab6

Timestamp:

Apr 12, 2011, 11:47:31 AM (14 years ago)

Author:

jazz

Comment:

--

NCTU110329/Lab6

@@ +1 @@
+[[PageOutline]]
+
+◢ <[wiki:NCTU110329/Lab5 實作五]> | <[wiki:NCTU110329 回課程大綱]> ▲ | <[wiki:NCTU110329/Lab7 實作七]> ◣
+
+= 實作六 =
+
+{{{
+#!html
+<div style="text-align: center;"><big style="font-weight: bold;"><big>MapReduce 程式編譯<br/>Compiling Hadoop MapReduce Java Program</big></big></div>
+}}}
+
+= Practice 1 : Word Count (Basic) =
+
+ * 上傳內容到 HDFS 內[[BR]]upload data to HDFS
+
+{{{
+$ cd /opt/hadoop
+$ mkdir lab4_input
+$ echo "I like NCHC Cloud Course." > lab4_input/input1
+$ echo "I like nchc Cloud Course, and we enjoy this course." > lab4_input/input2
+$ bin/hadoop fs -put lab4_input lab4_input
+$ bin/hadoop fs -ls lab4_input
+}}}
+
+ * 下載 [http://secuse.nchc.org.tw/class/WordCount.java WordCount.java] 並存到/opt/hadoop;[[BR]]Download [http://trac.nchc.org.tw/cloud/raw-attachment/wiki/WordCount/WordCount.java WordCount.java] and save to /opt/hadoop
+{{{
+~$ cd /opt/hadoop
+/opt/hadoop$ wget http://trac.nchc.org.tw/cloud/raw-attachment/wiki/WordCount/WordCount.java
+}}}
+
+ * 運作程式[[BR]]Compile WordCount.java and run it by '''hadoop jar''' command
+
+{{{
+$ mkdir MyJava
+$ javac -classpath hadoop-*-core.jar -d MyJava WordCount.java
+$ jar -cvf wordcount.jar -C MyJava .
+$ bin/hadoop jar wordcount.jar WordCount lab4_input/ lab4_out1/
+$ bin/hadoop fs -cat lab4_out1/part-00000
+}}}
+
+ * lab4_out1 執行結果 [[BR]]You should see results like this :
+{{{
+#!text
+Cloud   2
+Course, 1
+Course. 1
+I       2
+NCHC    1
+and     1
+course. 1
+enjoy   1
+like    2
+nchc    1
+this    1
+we      1
+}}}
+-----
+
+= Practice 2 : Word Count (Advanced) =
+
+{{{
+$ echo "\." >pattern.txt && echo "\," >>pattern.txt
+$ bin/hadoop fs -put pattern.txt ./
+$ mkdir MyJava2
+}}}
+
+
+ * 下載 [raw-attachment:wiki:Hadoop_Lab4:WordCount2.java WordCount2.java] 並存到/opt/hadoop;[[BR]]Download [raw-attachment:wiki:Hadoop_Lab4:WordCount2.java WordCount2.java] to /opt/hadoop
+{{{
+~$ cd /opt/hadoop
+/opt/hadoop$ wget http://trac.nchc.org.tw/cloud/raw-attachment/wiki/Hadoop_Lab4/WordCount2.java
+}}}
+
+{{{
+$ javac -classpath hadoop-*-core.jar -d MyJava2 WordCount2.java
+$ jar -cvf wordcount2.jar -C MyJava2 .
+$ bin/hadoop jar wordcount2.jar WordCount2 lab4_input lab4_out2 -skip pattern.txt
+$ bin/hadoop fs -cat lab4_out2/part-00000
+}}}
+
+ * lab4_out2 執行結果[[BR]]You should see results like this:
+{{{
+#!text
+Cloud   2
+Course  2
+I       2
+NCHC    1
+and     1
+course  1
+enjoy   1
+like    2
+nchc    1
+this    1
+we      1
+}}}
+
+ * Let's given case insensitive and ignore pattern for this example
+{{{
+/opt/hadoop$ bin/hadoop jar wordcount2.jar WordCount2 -Dwordcount.case.sensitive=false lab4_input lab4_out3 -skip pattern.txt
+/opt/hadoop$ bin/hadoop fs -cat lab4_out3/part-00000
+}}}
+
+ * lab4_out3 執行結果[[BR]]You should see results like this:
+{{{
+#!text
+and     1
+cloud   2
+course  3
+enjoy   1
+i       2
+like    2
+nchc    2
+this    1
+we      1
+}}}