hadoop 0.20 典型配置（独立模式，伪分布式模式，全分布式模式）

参考Hadoop权威指南附录A

最小配置如下：

组件名称

配置文件

属性名称

独立模式

standalone

伪分布式模式

pseudo-distributed

全分布式模式

fully-distributed

Common

conf/core-site.xml

fs.default.name

file:/// (默认)

hdfs://localhost

hdfs://namenode/

HDFS

conf/hdfs-site.xml

dfs.replication

N/A

1

3(默认)

MapReduce

conf/mapred-site.xml

mapred.job.tracker

local(默认)

localhost:8021

localhost:8021

 

伪分布式模式最小配置如下：

conf/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://localhost:9000</value>

         </property>

</configuration>

 

conf/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>

</configuration>

 

conf/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>localhost:9001</value>

        </property>

</configuration>