fs.default.name
hdfs://test01:9000
dfs.name.dir
/data/1/hadoop/dfs/nn,/data/2/hadoop/dfs/nn,/data/3/hadoop/dfs/nn,/data/4/hadoop/dfs/nn
dfs.data.dir
/data/1/hadoop/dfs/dn,/data/2/hadoop/dfs/dn,/data/3/hadoop/dfs/dn,/data/4/hadoop/dfs/dn
dfs.namenode.handler.count
20
dfs.datanode.max.xcievers
8192