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