Changes between Initial Version and Version 1 of Hadoop_Lab4_018

Timestamp:

Apr 26, 2010, 12:02:53 PM (16 years ago)

Author:

waue

Comment:

--

Hadoop_Lab4_018

@@ +1 @@
+{{{
+#!html
+<div style="text-align: center;"><big
+ style="font-weight: bold;"><big><big>實做四: Hadoop 程式編譯</big></big></big></div>
+}}}
+[[PageOutline]]
+
+ = 練習 0 : hello : 印出我們的 key value 為何 = 
+
+
+
+ * 下載 [http://trac.nchc.org.tw/cloud/raw-attachment/wiki/Hadoop_Lab4/nchc-example.jar nchc-example.jar]
+ {{{
+$ wget http://trac.nchc.org.tw/cloud/raw-attachment/wiki/Hadoop_Lab4/nchc-example.jar
+ }}}
+
+ * 執行客製化的hadoop 程式 
+
+{{{
+$ bin/hadoop jar nchc-example.jar
+}}}
+ * 輸出結果
+{{{
+******************************************
+歡迎使用 NCHC.Hadoop 的運算功能
+指令：
+  Hadoop jar nchc-example-*.jar <功能>
+功能：
+  wordcount: 計算輸入資料夾內分別在每個檔案的字數統計
+  mwc:       統合計算所有輸入檔的字數統計
+  grep:      算出包指定字串的個數
+  nchcgrep:  整合來源檔內的每個字與其所有出現的所在列
+  hello:     印出內容並統計累進字數
+******************************************
+
+}}}
+ * 使用hello
+{{{
+$ bin/hadoop jar nchc-example.jar hello
+}}}
+ * 使用提示：
+{{{
+hello <inDir> <outDir> <m> <r>
+}}}
+
+ * 範例：
+
+{{{
+$ bin/hadoop jar nchc-example.jar hello lab3_input lab4_out6 1 1
+}}}
+
+[wiki:Hadoop_Lab4_hello_018 hello 程式碼]
+
+ = 練習 1 : Word Count 初級版 =
+
+ * 上傳內容到hdfs內
+
+{{{
+$ 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 [raw-attachment:wiki:jazz/Hadoop_Lab6:WordCount.java WordCount.java] 並存到/opt/hadoop;
+{{{
+$ wget http://trac.nchc.org.tw/cloud/raw-attachment/wiki/jazz/Hadoop_Lab6/WordCount.java
+}}}
+
+ * 運作程式
+
+{{{
+$ 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 
+{{{
+#!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
+}}}
+-----
+
+ = 練習 2 : Word Count 進階版 =
+
+{{{
+$ echo "\." >pattern.txt && echo "\," >>pattern.txt
+$ bin/hadoop fs -put pattern.txt ./
+$ mkdir MyJava2
+}}}
+
+
+ * 下載 [raw-attachment:wiki:jazz/Hadoop_Lab6:WordCount2.java WordCount2.java] 並存到/opt/hadoop;
+{{{
+$ wget http://trac.nchc.org.tw/cloud/raw-attachment/wiki/jazz/Hadoop_Lab6/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
+{{{
+#!text
+Cloud   2
+Course  2
+I       2
+NCHC    1
+and     1
+course  1
+enjoy   1
+like    2
+nchc    1
+this    1
+we      1
+}}}
+
+{{{
+$ bin/hadoop jar wordcount2.jar WordCount2 -Dwordcount.case.sensitive=false lab4_input lab4_out3 -skip pattern.txt
+$ bin/hadoop fs -cat lab4_out3/part-00000
+}}}
+
+ * lab4_out3 執行結果
+{{{
+#!text
+and     1
+cloud   2
+course  3
+enjoy   1
+i       2
+like    2
+nchc    2
+this    1
+we      1
+}}}