在Windows上运行Hadoop，配置好java，cygwin，hadoop之后，要怎么做

Posted 2023-02-24

参考技术A 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）

<configuration>

<property>

<name>fs.default.name</name>

<value>hdfs://localhost:9000</value>

</property>

</configuration>
(3)修改hdfs-site.xml（指定副本为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.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 <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) 格式化并启动Hadoop

bi