mysql热备份主要分为主从备份和主主备份两种，下面介绍mysql实现主从备份的方法

1.主服务器配置

[mysqld]
#主从备份
log-bin=mysql-bin
binlog_format=mixed
server-id=1
read-only=0
binlog-do-db=mydb
binlog-ignore-db=mysql
binlog-ignore-db=test
binlog-ignore-db=information_schema
binlog-ignore-db=performance_schema
#双主备份
#auto-increment-increment=10
#auto-increment-offset=1

2.从服务器配置

[mysqld]
#主从备份
#log-bin=mysql-bin
#binlog_format=mixed
server-id=2
replicate-do-db=mydb
replicate-ignore-db=mysql
replicate-ignore-db=test
replicate-ignore-db=information_schema
replicate-ignore-db=performance_schema
replicate-wild-ignore-table=mydb.000%
replicate-wild-ignore-table=mydb.tmp%
replicate-wild-ignore-table=mysql.%
replicate-wild-ignore-table=test.%
replicate-wild-ignore-table=information_schema.%
replicate-wild-ignore-table=performance_schema.%
relay_log=mysql-relay-bin
log-slave-updates=ON

3.在mysql中创建一个备份用户

grant replication slave on *.* to 'backup'@'192.168.0.42' identified by '123456';

4.在从服务器中开启主从备份

mysql> CHANGE MASTER TO 
　　　　MASTER_HOST='192.168.0.41', 
　　　　MASTER_USER='backup', 
　　　　MASTER_PASSWORD='123456', 
　　　　MASTER_LOG_FILE='mysql-bin.000001', 
　　　　MASTER_LOG_POS=106;

5.主从备份开启后，重启mysql服务即可

sudo service mysql restart