MySQL的启动方式

MySQL常用启动方式：

windows 和linux 上都可以使用 mysql --help|grep my.cnf 过滤查看关于MySQL对应 配置文件my.cnf 

[root@bqh-118 bin]# mysql --help|grep my.cnf
order of preference, my.cnf, $MYSQL_TCP_PORT,
/etc/my.cnf /etc/mysql/my.cnf /usr/local/mysql/etc/my.cnf ~/.my.cnf

因我MySQL安装在/application目录下：

1、mysqld_safe

[root@bqh-118 /]# /application/mysql/bin/mysqld_safe --defaults-file=/etc/my.cnf --user=root &

客户端连接:

mysql --defaults-file=/etc/my.cnf or mysql -S /tm/mysql.sock

 

2、mysql.server

[root@bqh-118 mysql]# sed -i 's#/usr/local/mysql#/application/mysql#g' /application/mysql/bin/mysqld_safe /application/mysql/support-files/mysql.server #将默认路径替换成自定义安装路径
[root@bqh-118 mysql]# cp /application/mysql/support-files/mysql.server /etc/init.d/mysqld  #将生成的启动脚本拷贝到init.d目录下
[root@bqh-118 mysql]# chmod +x /etc/init.d/mysqld  #授予可执行权限
[root@bqh-118 mysql]# lsof -i:3306  #查询mysql服务是否开启

[root@bqh-118 mysql]# /etc/init.d/mysqld start
Starting MySQL.. SUCCESS!

启动mysql服务器:service mysql.server {start|stop|restart|reload|force-reload|status}

当然也可以让chkconfig来管理

客户端连接:

mysql --defaults-file=/etc/my.cnf or mysql -S /tm/mysql.sock

 

3、多实例mysqld_multi

mkdir $MYSQL_BASE/data2

cat <<-EOF>> /etc/my.cnf

[mysqld_multi]

mysqld = /application/mysql/bin/mysqld_safe

mysqladmin = /application/mysql/bin/mysqladmin

user = mysqladmin

password = mysqladmin

 

[mysqld3306]

port            = 3306

socket          = /tmp/mysql3306.sock

pid-file = /tmp/mysql3306.pid

skip-external-locking

key_buffer_size = 16M

max_allowed_packet = 1M

table_open_cache = 64

sort_buffer_size = 512K

net_buffer_length = 8K

read_buffer_size = 256K

read_rnd_buffer_size = 512K

myisam_sort_buffer_size = 8M

basedir = /application/mysql

datadir = /application/mysql/data

 

[mysqld3307]

port            = 3307

socket          = /tmp/mysql3307.sock

pid-file = /tmp/mysql3307.pid

skip-external-locking

key_buffer_size = 16M

max_allowed_packet = 1M

table_open_cache = 64

sort_buffer_size = 512K

net_buffer_length = 8K

read_buffer_size = 256K

read_rnd_buffer_size = 512K

myisam_sort_buffer_size = 8M

basedir = /application/mysql

datadir = /application/mysql/data2

EOF

 

#mysql -S /tmp/mysql3306.sock

mysql>GRANT SHUTDOWN ON *.* TO 'mysqladmin'@'localhost' identified by 'mysqladmin' with grant option;

 

#mysql -S /tmp/mysql3307.sock

mysql>GRANT SHUTDOWN ON *.* TO 'mysqladmin'@'localhost' identified by 'mysqladmin' with grant option;

 

启动mysql服务器:/application/mysql/bin/mysqld_multi --defaults-file=/etc/my.cnf start 3306-3307

关闭mysql服务器:/application/mysql/bin/mysqladmin shutdown

 

当然，也可以写脚本一键启动的。