环境及软件准备:
win7(64位)
cygwin 1.7.9-1
jdk-6u25-windows-x64.zip
hadoop-0.20.2.tar.gz
1.安装jdk,并置java环境变量包括:JAVA_HOME,PATH,CLASSPATH
2.安装Hadoop,版本为0.20.2,我是直接放到/home目录下,并解压
tar –zxvf
hadoop-0.20.2.tar.gz
3.配置Hadoop,需要修改hadoop的配置文件,它们位于conf子目录下,分别是hadoop-env.sh、core-site.xml、hdfs-site.xml
和mapred-site.xml
(1) 修改hadoop-env.sh:
只需要将JAVA_HOME 修改成JDK 的安装目录即可
export
JAVA_HOME=/cygdrive/d/java/jdk1.6.0_25
(注意:路径不能是windows 风格的目录d:\java\jdk1.6.0_25,而是LINUX
风格/cygdrive/d/java/jdk1.6.0_25)
(2) 修改core-site.xml:(指定namenode)
(3)修改hdfs-site.xml(指定副本为1)
(4) 修改mapred-site.xml (指定jobtracker)
4.验证安装是否成功,并运行Hadoop
(1) 验证安装
$ bin/hadoop
Usage: hadoop [--config confdir] COMMAND
where COMMAND is one of:
namenode -format format the DFS filesystem
secondarynamenode run the DFS secondary namenode
namenode run the DFS namenode
datanode run a DFS datanode
dfsadmin run a DFS admin client
mradmin run a Map-Reduce admin client
fsck run a DFS filesystem checking utility
fs run a generic filesystem user client
balancer run a cluster balancing utility
jobtracker run the MapReduce job Tracker node
pipes run a Pipes job
tasktracker run a MapReduce task Tracker node
job manipulate MapReduce jobs
queue get information regarding JobQueues
version print the version
jar
distcp
archive -archiveName NAME
daemonlog get/set the log level for each daemon
or
CLASSNAME run the class named CLASSNAME
Most commands print help when invoked w/o parameters.
(2) 格式化并启动Hadoop
bi