hadoop 伪分布式搭建
下载hadoop1.0.4版本,和jdk1.6版本或更高版本:1. 安装JDK,安装目录大家可以自定义,下面是我的安装目录:/usr/jdk1.6.0_22配置环境变量:# vi /etc/profile将环境变量添加到profile文件底部:export JAVA_HOME=/usr/jdk1.6.0_22
export PATH=$PATH:$JAVA_HOME/bin激活环境变量:# source /etc/profile2. 安装hadoop
创建hadoop用户及其hadoop组。
配置IP对应域名在$ vi /etc/hosts在hosts文件底部中添加如下:192.168.0.101 hadoop.master接下来下载hadoop安装包,大家可以到apache官网下载1.0.4版本
我这里将hadoop安装到hadoop用户目录下,解压hadoop安装文件,hadoop有三个核心配置文件core-site.xml,hdfs-site.xml,mapred-site.xml,
配置core-site.xml<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
<!-- Put site-specific property overrides in this file. -->
<configuration>
<property>
<name>fs.default.name</name>
<value>hdfs://hadoop.master:9000</value>
</property>
<property>
<name>hadoop.tmp.dir</name>
<value>/home/hadoop/tmp</value>
</property>
</configuration>配置hdfs-site.xml<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
<!-- Put site-specific property overrides in this file. -->
<configuration>
<property>
<name>dfs.replication</name>
<value>1</value>
</property>
<property>
<name>dfs.name.dir</name>
<value>/home/hadoop/hdfs/name</value>
</property>
<property>
<name>dfs.data.dir</name>
<value>/home/hadoop/hdfs/data</value>
</property>
</configuration>配置 mapred-site.xml<?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>hadoop.master:9001</value>
</property>
</configuration>最后配置haoop-env.sh文件# 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=/usr/jdk1.6.0_22
# Extra Java CLASSPATH elements.Optional.
export HADOOP_HOME=/home/hadoop/hadoop-1.0.4
# export HADOOP_CLASSPATH=
# The maximum amount of heap to use, in MB. Default is 1000.
# export HADOOP_HEAPSIZE=2000
# 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=10
export PATH=$PATH:$HADOOP_HOME/bin最后在配置hadoop环境变量在跟jdk在同一个文件,在jdk环境变量下面增加hadoop环境变量:export HADOOP_HOME=/home/hadoop/hadoop-1.0.4
export PATH=$PATH:$HADOOP_HOME/bin到这里所有环境配置已经完成:
再一次启动时需要namenode format,命令如下:$ hadoop namenode -format格式完成后,启动hadoop,使用命令$ ./start-all.sh使用jps查看hadoop启动的守护进程:$ jps
2734 NameNode
2860 DataNode
2996 SecondaryNameNode
3090 JobTracker
3261 TaskTrackerhadoop 伪分布式安装已经完成。
windows下如何搭建? 顶顶更健康! 初学者,顶起! 顶顶更健康! 还是不太懂,我是个新手,可以详细点吗?? 官方文档建议在非root下部署,不过作为练习环境可以了 初学者飘过 回顾一下,重点点出来了 需要搭建双节点吗