1.多实例安装场景
(1).某台服务器压力比较小,一个实例不能充分使用服务器的性能.
(2).某些服务器性能比较好.

3306 mysql1
3307 mysql2

2.安装多实例
(1).修改配置文件
# cp /etc/my.cnf /etc/my3307.cnf

(2).创建mysql3307的data目录和log目录
mkdir -p /home/mysql3307/mysql3307
mkdir -p /home/mysql3307/logs

(3).修改目录权限
chown mysql:mysql -R /home/mysql3307

(4).初始化mysql3307
/usr/local/mysql/bin/mysqld --defaults-file=/etc/my3307.cnf --initialize-insecure --basedir=/usr/local/mysql --datadir=/home/mysql3307/mysql3307 --user=mysql

(5).启动mysql3307
/usr/local/mysql/bin/mysqld_safe --defaults-file=/etc/my3307.cnf --user=mysql &

点击(此处)折叠或打开

mysql> show databases;

ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement.

mysql> set password=password('root')

-> ;

Query OK, 0 rows affected, 1 warning (0.00 sec)

mysql> flush privileges;

Query OK, 0 rows affected (0.02 sec)