wiki:waue/2010/0115-2-3
實做四: Hadoop 程式編譯

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
  • 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
    Cloud 2
    Course, 1
    Course. 1
    I 2
    NCHC  1
    and 1
    course. 1
    enjoy 1
    like  2
    nchc  1
    this  1
    we  1
    

Last modified 11 years ago Last modified on Jan 26, 2010, 11:36:20 PM