配置主机间 ssh 互信
ssh-copy-id hadoop02
ssh-copy-id hadoop03
配置系统参数
echo 0 | sudo tee /proc/sys/vm/swappiness
echo 1 | sudo tee /proc/sys/vm/overcommit_memory
echo 262144 | sudo tee /proc/sys/vm/max_map_count
ulimit -n 655350 && echo -e '* soft nofile 655350\\\n* hard nofile 655350' >> /etc/security/limits.conf
ulimit -u 655350 && echo -e '* soft nproc 655350\\\n* hard nproc 655350' >> /etc/security/limits.conf && sed -i 's/4096/655350/' /etc/security/limits.d/20-nproc.conf
ss -antpl | grep -E '8030|9010|9020|9030'
ss -antpl | grep -E '90