Hadoop classname Command Use note-point blog Category: Hadoop hadoop&http://www.aliyun.com/zixun/aggregation/37954.html ">nbsp; Hadoop uses the Hadoop classname command. This classname is the name of the class you wrote. The Hadoop classname command is similar to the Java classname.
Before using Hadoop Classnam, you need to set up Hadoop_classpath.
Export hadoop_classpath=/home/hadoop/jardir/*.jar:/home/hadoop/workspace/hdfstest/bin/
Where/home/hadoop/jardir/contains all my Hadoop jar packs.
/home/hadoop/workspace/hdfstest/bin/is the directory of my development class, I use Eclipse to write Java development, because Eclipse has the ability to compile automatically, after writing, You can run the Hadoop classname command directly at the command line:
Hadoop Filesystemdoublecat Hdfs://hadoop:8020/xstartup
You can also make your project a runable jar package (Pack all the jar packs).
Then run the Hadoop Jar Jar package name type parameter 1.
Each time to make a jar package, which is very inconvenient for testing ...
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