系统配置

1、修改hostname

hostnamectl set-hostname 172-188-1-47

useradd hadoop
passwd -x 99999 hadoop

3、挂载磁盘

df -h
fdisk -l
#挂载磁盘
mkdir  /data
rm -rf /data/*
mkfs.xfs /dev/sdb
mount  /dev/sdb /data
#设置开机自动挂载
echo '' >> /etc/fstab
echo '/dev/sdg /data7                       xfs     defaults        0 0'  >> /etc/fstab

4、关闭THP

echo ''  >>  /etc/rc.d/rc.local
echo     'if test -f /sys/kernel/mm/transparent_hugepage/enabled; then' >>  /etc/rc.d/rc.local
echo 'echo never > /sys/kernel/mm/transparent_hugepage/enabled' >>  /etc/rc.d/rc.local
echo     'fi' >>  /etc/rc.d/rc.local
echo     'if test -f /sys/kernel/mm/transparent_hugepage/defrag; then' >>  /etc/rc.d/rc.local
echo       'echo never > /sys/kernel/mm/transparent_hugepage/defrag'  >>  /etc/rc.d/rc.local
echo     'fi'  >>  /etc/rc.d/rc.local

chmod u+x /etc/rc.d/rc.local

#修改swap配置

echo 'vm.swappiness = 1' >> /etc/sysctl.conf

echo 'vm.max_map_count=262144' >> /etc/sysctl.conf