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Hadoop集群安装 (3) 配置conf/hdfs-site.xml

2012-01-09 16:50 471 查看
1. 配置NameNode和DataNode的目录 ()

说明:配置dfs.name.dir 和 dfs.data.dir

<property>
<name>dfs.namenode.name.dir</name>
<value>file://${hadoop.tmp.dir}/dfs/name</value>
<description>Determines where on the local filesystem the DFS name node
should store the name table(fsimage).  If this is a comma-delimited list
of directories then the name table is replicated in all of the
directories, for redundancy. </description>
</property>

<property>
<name>dfs.datanode.data.dir</name>
<value>file://${hadoop.tmp.dir}/dfs/data</value>
<description>Determines where on the local filesystem an DFS data node
should store its blocks.  If this is a comma-delimited
list of directories, then data will be stored in all named
directories, typically on different devices.
Directories that do not exist are ignored.
</description>
</property>


2. 配置副本度

<property>
<name>dfs.replication</name>
<value>2</value>
</property>


3. 设置块大小

<property>
<name>dfs.block.size</name>
<value>134217728</value>
</property>
64M:	67108864
32M:	33554432
16M:	16777216
8M:		8388608
4M:		4194304
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