mysql單伺服器啟動多個例項實際有兩種方式
第一種方式就是使用mysql mysqld_multi
第二種方式就是分別使用不同的目錄埠啟動不同的例項
第一種方式：
1、資料庫例項目錄
data3306
data3307
data3308
2、建立例項
/usr/local/mysql//scripts/mysql_install_db –basedir=/usr/local/mysql/ –datadir=/usr/local/mysql/data3306 –user=mysql
/usr/local/mysql//scripts/mysql_install_db –basedir=/usr/local/mysql/ –datadir=/usr/local/mysql/data3307 –user=mysql
/usr/local/mysql//scripts/mysql_install_db –basedir=/usr/local/mysql/ –datadir=/usr/local/mysql/data3308 –user=mysql
3、修改my.cnf檔案修改部分
[mysqld_multi]
mysqld = /usr/local/mysql//bin/mysqld
mysqladmin = /usr/local/mysql//bin/mysqladmin
user = root
password = 123456
[mysqld3306]
port = 3306
socket = /usr/local/mysql/mysqld3306.sock
pid-file = /usr/local/mysql/mysqld3306.pid
basedir = /usr/local/mysql/
datadir = /usr/local/mysql/data3306
[mysqld3307]
port = 3307
socket = /usr/local/mysql/mysqld3307.sock
pid-file = /usr/local/mysql/mysqld3307.pid
basedir = /usr/local/mysql/
datadir = /usr/local/mysql/data3307
[mysqld3307]
port = 3307
socket = /usr/local/mysql/mysqld3308.sock
pid-file = /usr/local/mysql/mysqld3308.pid
basedir = /usr/local/mysql/
datadir = /usr/local/mysql/data3308
4、啟動資料庫
mysqld_multi –defaults-file=/etc/mysql/my.cnf start 3306
mysqld_multi –defaults-file=/etc/mysql/my.cnf start 3307
mysqld_multi –defaults-file=/etc/mysql/my.cnf start 3308
5、登入資料庫修改root密碼
mysql -s /usr/local/mysql/mysqld3306.sock
mysql -s /usr/local/mysql/mysqld3307.sock
mysql -s /usr/local/mysql/mysqld3308.sock
use mysql
update user set password=password('123456') where user=』root』;
flush privileges;
6、關閉資料庫
mysqld_multi –defaults-file=/etc/mysql/my.cnf stop 3306
mysqld_multi –defaults-file=/etc/mysql/my.cnf stop 3307
mysqld_multi –defaults-file=/etc/mysql/my.cnf stop 3308
7、全部啟動/關閉
mysqld_multi –defaults-file=/etc/mysql/my.cnf start 3306-3308
mysqld_multi –defaults-file=/etc/mysql/my.cnf stop 3306-3308
第二種方式：
1，建立目錄
data3307
data3308
2,分別新增配置未見my.cnf
並修改裡面相關的引數
3.進行系統表初始化也可以從現有的複製過來一會
/usr/local/mysql//scripts/mysql_install_db –basedir=/usr/local/mysql/ –datadir=/usr/local/mysql/data3307 –user=mysql
/usr/local/mysql//scripts/mysql_install_db –basedir=/usr/local/mysql/ –datadir=/usr/local/mysql/data3308 –user=mysql
4，啟動指令碼修改
cp /etc/init.d/mysql.server /etc/ini.d/mysql3307.server cp /etc/init.d/mysql.server /etc/init.d/mysql3308.server
然後修改裡面的配置路徑
5，分別啟動資料庫，啟動之前相關目錄許可權修改為mysql:mysql
/etc/init.d/mysql.server start /etc/init.d/mysql3307.server start /etc/init.d/mysql3308.server start
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