启停HDFS服务

HDFS服务启停，下面脚本需要在master节点运行，切需要在hdfs账号下。su hdfs

启动HDFS

执行下面脚本

#!/bin/bash

worker_cnt=`cat /etc/hosts | grep emr-worker | grep cluster | wc -l`
master_cnt=1
ha_flag=`grep -r high_availability_enable=true /usr/local/emr/emr-bin/script/`
nn_file=/usr/local/emr/emr-bin/script/hdfs/pre_start.sh
dn_file=/usr/local/emr/emr-bin/script/hdfs/start_up.sh
if [[ ! -z $ha_flag