简单的MySQL数据库主从同步配置 数据库主从同步的原理

Master配置：

代码如下

log-bin = mysql-bin
server-id = 1
binlog-do-db = powerdns #要同步的数据库

Master新增slave账号：

代码如下

mysql> GRANT replication slave ON *.* TO "slave"@"192.168.1.2" IDENTIFIED BY "passwd";
mysql> FLUSH privileges;

重启Master MySQL，查看Master状态信息，记住File名称，POS位置。

代码如下

mysql> show master status;
+------------------+----------+--------------+------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql-bin.000002 | 309 | powerdns | mysql |
+------------------+----------+--------------+------------------+
1 row in set (0.00 sec)

Slave配置：

代码如下

server-id =2

开始同步：

代码如下

mysql> CHANGE master TO master_host="192.168.1.1",master_user="slave",master_password="passwd",
master_log_file="mysql-bin.000002",master_log_pos=309;
mysql> START slave;

查看Slave同步状态：

代码如下

mysql> SHOW slave STATUSG;
Slave_IO_Running: Yes
Slave_SQL_Running: Yes