mysql主从配置的参数配置与步骤_MySQL

主从配置的步骤：

在主库建立要同步的数据库,建立主库的帐号和修改主备库配置

create database web default character set utf8

grant replication slave on *.* to 'repdcssub'@'192.168.191.112' identified by '123456';

grant all privileges on *.* to 'repdcssub'@'192.168.191.112' identified by '123456'

mysql -h192.168.191.113 -urep -p123456

mysqldump --master-data 这样可以在从上还原,

建立同步用户(主从)

grant replication slave on *.* to 'repdcs'@'192.168.191.110' identified by '123456';

grant all privileges on *.* to 'repdcs'@'192.168.191.110' identified by '123456';

FLUSH PRIVILEGES;

mysql> show master status;

FLUSH PRIVILEGES;

从库配置my.cnf

[root@ligangtest u02]# more /etc/my.cnf

[mysqld]

datadir=/u02/ligangdata

socket=/var/lib/mysql/mysql.sock

user=mysql

old_passwords=1

character-set-server=utf8

symbolic-links=0

lower_case_table_names=1

default-storage-engine=innoDB

#innodb_log_buffer_pool_size=2G

max_connections=300

server-id=2

init_connect='SET NAMES utf8'

log-bin=mysqlbin

master-host=192.168.191.111

master-user=repdcs

master-pass=123456

master-connect-retry=60

replicate-do-db=dcs

[mysqld_safe]

log-error=/u03/log/mysqld.log

pid-file=/var/run/mysqld/mysqld.pid

[mysql]

default-character-set=utf8

#character-set-server=utf8

主库配置my.ini

[root@ligang log]# more /etc/my.cnf

[mysqld]

datadir=/u02/ligangdata

socket=/var/lib/mysql/mysql.sock

user=mysql

old_passwords=1

character-set-server=utf8

# Disabling symbolic-links is recommended to prevent assorted security risks;

symbolic-links=0

lower_case_table_names=1

default-storage-engine=innoDB

server-id=1

log-bin=mysqlbin

innodb_flush_log_at_trx_commit=1

sync_binlog=1

init_connect='SET NAMES utf8'

#innodb_log_buffer_pool_size=2G

max_connections=300

[mysqld_safe]

log-error=/u03/log/mysqld.log

pid-file=/var/run/mysqld/mysqld.pid

[mysql]

default-character-set=utf8

#character-set-server=utf8

参数配置说明

server-id=n //设置数据库id默认主服务器是1可以随便设置但是如果有多台从服务器则不能重复。

master-host=192.168.191.111 //主服务器的IP地址或者域名

master-port=3306 //主数据库的端口号

master-user=repdcs //同步数据库的用户

master-password=123456 //同步数据库的密码

master-connect-retry=60 //如果从服务器发现主服务器断掉，重新连接的时间差

replicate-do-db=dcs //进行同步的数据库

设置从服务器为readonly

mysql -e "set global read_only=1;"

查看主备库正常与否的命令：

SHOW SLAVE STATUS;

SHOW MASTER STATUS;

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TAG标签：主从步骤参数