linux上搭建Hadoop

linux环境

1.

/etc/hosts （是否必须）

http://hi.baidu.com/2enjoy/blog/item/28e4e721a24d62419922ed75.html

注意：机器是动态IP

cat ./a >> ./b

3.建立ssh无密码登录

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在namenode上无密码登录本机

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?配置文件2：hdfs-site.xml
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配置文件3：mapred-site.xml
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$hadoop namenode -format
参考http://dikar.iteye.com/blog/941877
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starting namenode, logging to /home/djboss/hdtest/hadoop-1.0.2/libexec/../logs/hadoop-djboss-namenode-DevStation24.out192.168.123.61: starting datanode, logging to /home/djboss/hdtest/hadoop-1.0.2/libexec/../logs/hadoop-djboss-datanode-TestStation61.out192.168.123.24: starting secondarynamenode, logging to /home/djboss/hdtest/hadoop-1.0.2/libexec/../logs/hadoop-djboss-secondarynamenode-DevStation24.out
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http://www.infoq.com/cn/articles/hadoop-config-tip
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