Hadoop集群安装 (3) 配置conf/hdfs-site.xml

1. 配置NameNode和DataNode的目录   ()

说明：配置dfs.name.dir 和 dfs.data.dir

	dfs.namenode.name.dir
	file://${hadoop.tmp.dir}/dfs/name
	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. 




	dfs.datanode.data.dir
	file://${hadoop.tmp.dir}/dfs/data
	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.
	

2. 配置副本度

  
        dfs.replication  
        2  

3. 设置块大小

    
        dfs.block.size    
        134217728    

64M:	67108864
32M:	33554432
16M:	16777216
8M:		8388608
4M:		4194304