Changes between Initial Version and Version 1 of FDC110829/Lab4

Timestamp:

Aug 28, 2011, 11:02:43 PM (13 years ago)

Author:

jazz

Comment:

--

FDC110829/Lab4

@@ +1 @@
+[[PageOutline]]
+
+◢ <[wiki:FDC110829/Lab3 實作三]> | <[wiki:FDC110829 回課程大綱]> ▲ | <[wiki:FDC110829/Lab5 實作五]> ◣
+
+= 實作四 Lab4 =
+
+{{{
+#!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
+
+{{{
+$ mkdir lab6_input
+$ echo "I like NCTU Cloud Course." > lab6_input/input1
+$ echo "I like nctu Cloud Course, and we enjoy this course." > lab6_input/input2
+$ hadoop fs -put lab6_input lab6_input
+$ hadoop fs -ls lab6_input
+Found 2 items
+-rw-r--r--   2 hXXXX supergroup         26 2011-04-19 10:07 /user/hXXXX/lab6_input/input1
+-rw-r--r--   2 hXXXX supergroup         52 2011-04-19 10:07 /user/hXXXX/lab6_input/input2
+}}}
+
+ * 下載 [http://hadoop.nchc.org.tw/WordCount.java WordCount.java] 並存到家目錄;[[BR]]Download [http://hadoop.nchc.org.tw/WordCount.java WordCount.java] and save to your home directory
+{{{
+~$ wget http://hadoop.nchc.org.tw/WordCount.java
+}}}
+
+ * 運作程式[[BR]]Compile WordCount.java and run it by '''hadoop jar''' command
+
+{{{
+$ mkdir MyJava
+$ ln -s /usr/lib/hadoop/hadoop-*-core.jar hadoop-core.jar
+$ javac -classpath hadoop-core.jar -d MyJava WordCount.java
+$ jar -cvf wordcount.jar -C MyJava .
+$ hadoop jar wordcount.jar WordCount lab6_input/ lab6_out1/
+$ hadoop fs -cat lab6_out1/part-00000
+}}}
+
+ * lab6_out1 執行結果 [[BR]]You should see results like this :
+{{{
+#!text
+Cloud   2
+Course, 1
+Course. 1
+I       2
+NCTU    1
+and     1
+course. 1
+enjoy   1
+like    2
+nctu    1
+this    1
+we      1
+}}}
+-----
+
+= Practice 2 : Word Count (Advanced) =
+
+{{{
+$ echo "\." >pattern.txt && echo "\," >>pattern.txt
+$ hadoop fs -put pattern.txt .
+$ mkdir -p MyJava2
+}}}
+
+
+ * 下載 [http://hadoop.nchc.org.tw/WordCount2.java WordCount2.java] 並存到家目錄;[[BR]]Download [http://hadoop.nchc.org.tw/WordCount2.java WordCount2.java] to home directory
+{{{
+~$ wget http://hadoop.nchc.org.tw/WordCount2.java
+}}}
+
+{{{
+$ javac -classpath hadoop-core.jar -d MyJava2 WordCount2.java
+$ jar -cvf wordcount2.jar -C MyJava2 .
+$ hadoop jar wordcount2.jar WordCount2 lab6_input lab6_out2 -skip pattern.txt
+$ hadoop fs -cat lab6_out2/part-00000
+}}}
+
+ * lab6_out2 執行結果[[BR]]You should see results like this:
+{{{
+#!text
+Cloud   2
+Course  2
+I       2
+NCTU    1
+and     1
+course  1
+enjoy   1
+like    2
+nctu    1
+this    1
+we      1
+}}}
+
+ * Let's given case insensitive and ignore pattern for this example
+{{{
+$ hadoop jar wordcount2.jar WordCount2 -Dwordcount.case.sensitive=false lab6_input lab6_out3 -skip pattern.txt
+$ hadoop fs -cat lab6_out3/part-00000
+}}}
+
+ * lab6_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
+nctu    2
+this    1
+we      1
+}}}