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。
