win7（64位）
cygwin 1.7.9-1
jdk-6u25-windows-x64.zip
hadoop-0.20.2.tar.gz
1.安裝jdk，並置java環境變量包括：JAVA_HOME，PATH，CLASSPATH
2.安裝Hadoop，版本為0.20.2，我是直接放到/home目錄下，並解壓
tar –zxvf
hadoop-0.20.2.tar.gz
3.配置Hadoop，需要修改hadoop的配置文件，它們位於conf子目錄下，分別是hadoop-env.sh、core-site.xml、hdfs-site.xml
和mapred-site.xml
(1) 修改hadoop-env.sh：
只需要將JAVA_HOME 修改成JDK 的安裝目錄即可
export
JAVA_HOME=/cygdrive/d/java/jdk1.6.0_25
（註意：路徑不能是windows 風格的目錄d:\java\jdk1.6.0_25，而是LINUX
風格/cygdrive/d/java/jdk1.6.0_25）
(2) 修改core-site.xml：（指定namenode）
<configuration>
<property>
<name>fs.default.name</name>
<value>hdfs://localhost:9000</value>
</property>
</configuration>
(3)修改hdfs-site.xml（指定副本為1）
<configuration>
<property>
<name>dfs.replication</name>
<value>1</value>
</property>
</configuration>
(4) 修改mapred-site.xml （指定jobtracker）
<configuration>
<property>
<name>mapred.job.tracker</name>
<value>localhost:9001</value>
</property>
</configuration>
4.驗證安裝是否成功，並運行Hadoop
(1) 驗證安裝
$ 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 <jar> run a jar file
distcp <srcurl> <desturl> copy file or directories recursively
archive -archiveName NAME <src>* <dest> create a hadoop archive
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) 格式化並啟動Hadoop
bi