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mysql_multi是用来管理多个mysql实例的脚本命令。这个实验主要是编辑my.cnf。首先要创建多个不同的目录用于存放不同的实例。然后用bin/mysql_install_db --basedir=mysql的目录 --datadir=数据存放的目录 --user=所属的用户,创建好了多个mysql实例后就编辑文档my.cnf在里面加上:
[mysqld_multi]
mysqld=/usr/local/mysql/bin/mysqld_safe(根据自己的安装路径)
mysqladmin=/usr/local/mysql/bin/mysqladmin(根据自己的安装路径)
user=mysql
password=123456
[mysql3306(必须是整数每个实例都不相同)]
port=3306(每个实例的端口号必须是不同的)
socket=/tmp/mysql3306.sock(每个实例socket文件名字不能相同)
pid-file=/tmp/mysql3306.pid(每个实例的pid名字不能相同)
basedir=mysql存放的目录
datadir=mysql实例存放的路径
.
.
.
其它的参数可以根据自己的需要增减。
在用mysqld_multi --defaults-file=/etc/my.cnf --user=mysql start 端口号。进行启动。
用mysql -S /tmp/mysql3306.sock进行连接。
也可以用mysql -u mysql -P 端口号 --protocol=tcp进行连接。
连接上去后要创建用户和密码不然不能关掉mysql实例。
创建的用户名和密码要和my.cnf文件里的[mysqld_multi]下面的user和password一致。
创建的命令是:grant shutdown on *.* to root@localhost identified by 123456;
用show grants for mysql@localhost;可以查看用户的权限等信息。 bitsCN.com

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