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Client configuration 본문
1. unset current HADOOP_CONF_DIR if set
2.
$ sudo mv [conf dir path] /etc/hadoop-0.20/
3.
$ sudo update-alternatives --install /etc/hadoop-0.20/conf hadoop-0.20-conf /etc/hadoop-0.20/[conf dir name] [priority]
4. (Not sure) restart your machine (Testing on my machine with reboot, it is applied while on server without reboot, it isn't)
5. To query Hadoop configuration alternatives
$ sudo update-alternatives --display hadoop-0.20-conf
6. When running a test from eclipse, add the "-conf <path to conf dir>" option.
7. Run an example (hadoop must be installed locally)
@$ hadoop jar /usr/lib/hadoop/hadoop-*-examples.jar pi 10 100000000@
Follow the progress of the example on the console, on the cluster's "MapReduce administration page":http://[namenode]:50030/ or using the Job Browser provided by "Hue":http://[namenode]:8088/
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