教你如何在win7中的cygwin64下安装hadoop

首先我们要准备如下环境及软件：

win7（64位）

cygwin 1.7.-

jdk-6u25-windows-x64.zip

hadoop-0.20..tar.gz

1.在win7系统上正常安装jdk，同时注意设置好java环境的变量：

主要的变量包括：JAVA_HOME，PATH，CLASSPATH

（不会设置的请自备梯子）

2.接下来是安装Hadoop，我目前安装的版本为0.20.2版本，为了方便，

我暂时是直接放到了cygwin64的/home目录下(正常情况下，请放在/usr目录下)，

并使用tar命令进行解压操作。

lenovo@lenovo-PC /home
$ tar -zxvf hadoop-0.20..tar.gz

3.光安装完Hadoop是不够的，还需要一些简单的配置工作，主要的配置文件有4个，

它们位于Hadoop的安装目录的conf子目录下，分别是：

hadoop-env.sh
core-site.xml
hdfs-site.xml
mapred-site.xml

下面将是如何修改的详细部分：

(1) 修改hadoop-env.sh文件：

这步比较简单，只需要将JAVA_HOME 修改成JDK 的安装目录即可：

红色标出的是修改后的样子。

# Set Hadoop-specific environment variables here.

# The only required environment variable is JAVA_HOME.  All others are
# optional.  When running a distributed configuration it is best to
# set JAVA_HOME in this file, so that it is correctly defined on
# remote nodes.

# The java implementation to use.  Required.
export JAVA_HOME=/cygdrive/d/android/java/jdk1.7.0_15

# Extra Java CLASSPATH elements.  Optional.
# export HADOOP_CLASSPATH=

# The maximum amount of heap to use, in MB. Default is .
# export HADOOP_HEAPSIZE=

# Extra Java runtime options.  Empty by default.
# export HADOOP_OPTS=-server

# Command specific options appended to HADOOP_OPTS when specified
export HADOOP_NAMENODE_OPTS="-Dcom.sun.management.jmxremote $HADOOP_NAMENODE_OPTS"
export HADOOP_SECONDARYNAMENODE_OPTS="-Dcom.sun.management.jmxremote $HADOOP_SECONDARYNAMENODE_OPTS"
export HADOOP_DATANODE_OPTS="-Dcom.sun.management.jmxremote $HADOOP_DATANODE_OPTS"
export HADOOP_BALANCER_OPTS="-Dcom.sun.management.jmxremote $HADOOP_BALANCER_OPTS"
export HADOOP_JOBTRACKER_OPTS="-Dcom.sun.management.jmxremote $HADOOP_JOBTRACKER_OPTS"
# export HADOOP_TASKTRACKER_OPTS=
# The following applies to multiple commands (fs, dfs, fsck, distcp etc)
# export HADOOP_CLIENT_OPTS

# Extra ssh options.  Empty by default.
# export HADOOP_SSH_OPTS="-o ConnectTimeout=1 -o SendEnv=HADOOP_CONF_DIR"

# Where log files are stored.  $HADOOP_HOME/logs by default.
# export HADOOP_LOG_DIR=${HADOOP_HOME}/logs

# File naming remote slave hosts.  $HADOOP_HOME/conf/slaves by default.
# export HADOOP_SLAVES=${HADOOP_HOME}/conf/slaves

# host:path where hadoop code should be rsync'd from.  Unset by default.
# export HADOOP_MASTER=master:/home/$USER/src/hadoop

# Seconds to sleep between slave commands.  Unset by default.  This
# can be useful in large clusters, where, e.g., slave rsyncs can
# otherwise arrive faster than the master can service them.
# export HADOOP_SLAVE_SLEEP=0.1

# The directory where pid files are stored. /tmp by default.
# export HADOOP_PID_DIR=/var/hadoop/pids

# A string representing this instance of hadoop. $USER by default.
# export HADOOP_IDENT_STRING=$USER

# The scheduling priority for daemon processes.  See 'man nice'.
# export HADOOP_NICENESS=

（注意：这里的路径不能是windows 风格的目录d:\java\jdk1.7.0_15，而是LINUX 风格/cygdrive/d/java/jdk1.7.0_15）

(2) 修改core-site.xml：

红色标出的是增加的代码。

(3)修改hdfs-site.xml（指定副本为1）

红色标出的是增加的代码。

(4) 修改mapred-site.xml （指定jobtracker）

 

红色标出的是增加的代码。

<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>

<!-- Put site-specific property overrides in this file. -->

<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

(2) 格式化并启动Hadoop

$ bin/hadoop namenode –format
// :: INFO namenode.NameNode: STARTUP_MSG:
/************************************************************
STARTUP_MSG: Starting NameNode
STARTUP_MSG:   host = lenovo-PC/192.168.41.1
STARTUP_MSG:   args = [▒Cformat]
STARTUP_MSG:   version = 0.20.2
STARTUP_MSG:   build = https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.20 -r 911707; compiled by 'chrisdo' on Fri Feb 19 08:07:34 UTC 2010
************************************************************/
Usage: java NameNode [-format] | [-upgrade] | [-rollback] | [-finalize] | [-importCheckpoint]
// :: INFO namenode.NameNode: SHUTDOWN_MSG:
/************************************************************
SHUTDOWN_MSG: Shutting down NameNode at lenovo-PC/192.168.41.1
************************************************************/

$ bin/start-all.sh
starting namenode, logging to /home/hadoop-0.20./bin/../logs/hadoop-lenovo-namenode-lenovo-PC.out
localhost: /home/hadoop-0.20./bin/slaves.sh: line : ssh: command not found
localhost: /home/hadoop-0.20./bin/slaves.sh: line : ssh: command not found
starting jobtracker, logging to /home/hadoop-0.20./bin/../logs/hadoop-lenovo-jobtracker-lenovo-PC.out
localhost: /home/hadoop-0.20./bin/slaves.sh: line : ssh: command not found

(3) 查看Hadoop

命令行查看：

（注意：win7下cygwin中DateNode和TaskTracker进程是无法显示的，应该是cygwin的问题）

现在可以网页查看效果了：

http://localhost:50030

http://localhost:50070

(4) 关闭Hadoop

bin/stop-all.sh

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