Version 1 (modified by jazz, 11 years ago) (diff) |
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實作二十二 Lab22
透過 MapReduce 的設定檔傳遞參數
Passing Arguments to Mapper and Reducer with Configuration
請先連線至 nodeN.3du.me , N 為您的報名編號
cd ~/hadoop_labs/lab013 ant hadoop fs -put l13_input l13_input hadoop jar WordCount.jar l13_input l13_output hadoop fs -cat l13_output/part-r-00000 hadoop jar WordCount.jar -Dwordcount.case.sensitive=false l13_input l13_output2 hadoop fs -cat l13_output2/part-r-00000
- Reference:
- http://hadoop.apache.org/docs/r1.0.4/api/org/apache/hadoop/conf/Configuration.html
- org.apache.hadoop.conf.Configuration.setBoolean(String name, boolean value)
- org.apache.hadoop.conf.Configuration.getBoolean(String name, boolean defaultValue)
- org.apache.hadoop.mapreduce.Mapper.setup(Mapper.Context context)
- org.apache.hadoop.mapreduce.JobContext.getConfiguration()
- http://www.cloudera.com/content/cloudera-content/cloudera-docs/HadoopTutorial/CDH4/Hadoop-Tutorial/ht_topic_7_1.html
- http://hadoop.apache.org/docs/r1.0.4/api/org/apache/hadoop/conf/Configuration.html
實作習題
<問題 1>