一、MySQ主从复制（主库写入数据，从库读取数据）

MySql官方下载地址：http://dev.mysql.com/downloads/mysql/

MySql常用命令：

设置密码 UPDATE USER SET PASSWORD=PASSWORD('123456') WHERE USER='root';

使用命令show global variables like 'port';查看端口号

使用“GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'root' WITH GRANT OPTION;”命令可以更改远程连接的设置。

安装mysql服务命：mysqld install mysql       启动mysql命令：net start mysql

1.主库配置：

第一步：my.ini配置文件

[mysqld]
server-id = 1
log-bin = mysql-bin
binlog-do-db = test
binlog-ignore-db = mysql
binlog-ignore-db = information_schema
binlog-ignore-db = performance_schema

第二步：给主数据库开启可以让从数据库访问的账户

SHOW MASTER STATUS;

GRANT REPLICATION SLAVE ON *.* TO '用户名'@'%' IDENTIFIED BY '密码';

SELECT * FROM USER WHERE USER='用户名';

SHOW VARIABLES LIKE '%log_bin%';

2.从库配置：

第一步：my.ini配置文件

[mysqld]
server-id = 2
replicate-do-db=test
relay-log=slave-relay-bin
relay-log-index=slave-relay-bin.index

第二步：从库连接主数据库进行数据同步

STOP SLAVE

RESET SLAVE;

CHANGE MASTER TO
MASTER_HOST="主数据库IP地址",
MASTER_PORT=3306,
MASTER_USER="用户名",
MASTER_PASSWORD="密码",
MASTER_LOG_FILE='mysql-bin.000001',
MASTER_LOG_POS=120;

START SLAVE;

SHOW SLAVE STATUS

 二、MyCAT实现MySQL的读写分离

http://www.cnblogs.com/ivictor/p/5131480.html

三、MySQL需要不断进行拆库拆表