hadoop 安装
安装hadoop的概要：参考：http://blog.chinaunix.net/uid-22655236-id-3174616.html 1. 下载hadoop-1.1.0.tar.gz tar -zxvf hadoop-1.1.0.tar.gz 2.cd /usr/lib/jvm/ 找到你安装jave的路径. 然后指明jave的路径：export JAVA_HOME=/usr/lib/jvm/java-6-openjdk-i386echo $JAVE_HOME3.cd /root/hadoop-1.1.0/confvim hadoop-env.shexport JAVA_HOME=/usr/lib/jvm/java-6-openjdk-i3864.cp /root/hadoop-1.1.0/src/core/core-default.xml ../../conf/cp /root/hadoop-1.1.0/src/hdfs/hdfs-default.xml ../../conf/cp /root/hadoop-1.1.0/src/mapred/mapred-default.xml ../../conf/mv core-default.xml core-site.xmlvim core-site.xmlhadoop.tmp.dir/app/hadoop/tmpA base for other temporary directories. fs.default.namehdfs://localhost:54310The name of the default file system.A URI whosescheme and authority determine the FileSystem implementation.Theuri's scheme determines the config property (fs.SCHEME.impl) namingthe FileSystem implementation>determine the host, port, etc. for a filesystem. mv hdfs-default.xml hdfs-site.xmlvim hdfs-site.xmldfs.replication1Default block replication.The actual number of replications can be specified when the file is created.The default is used if replication is not specified in create time. mv mapred-default.xml mapred-site.xmlvim mapred-site.xmlmapred.job.trackerlocalhost:54311The host and port that the MapReduce job tracker runsat.If "local", then jobs are run in-process as a single mapand reduce task.5.注意要安装ssh： sudo apt-cache search openssh*并启动：/etc/init.d/ssh restart6.ubuntu创建ssh无密码登录 ssh-keygen -t rsa cd /root/.ssh cat> ssh localhost可以进行测试看你配置是否成功！7. cd /root/hadoop-1.1.0 bin/hadoop namenode -format //格式化hdfs文件系统 bin/start-all.sh启动hadoop相关的进程！ jps 显示相关的jave进程如下：17779 SecondaryNameNode18105 TaskTracker17870 JobTracker17547 DataNode19641 Jps17318 NameNode //前面是进程号，后面是进程的名字！ bin/stop-all.sh 启动hadoop相关的进程！ 注：参考文章：http://blog.163.com/code4fun@126/blog/static/45776537201001415039101/http://www.michael-noll.com/tutorials/running-hadoop-on-ubuntu-linux-single-node-cluster/http://blog.csdn.net/sulliy/article/details/7014169http://blog.csdn.net/hitzhang/article/details/5216292jps显示在jave环境运行的进程
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