mysql 5.6主从同步

主库IP：192.168.1.10从库IP：192.168.1.111、主库配置编辑my.cnf：

# 启用二进制日志


log_bin = mysql-bin

server-id = 111   // 此 ID 号不可重复

log-bin-index=mysql-bin.index

sync_binlog=1binlog_format=mixed

binlog-do-db = testdb //同步数据库

binlog-ignore-db = mysql

binlog-ignore-db = performance_schema

binlog-ignore-db = information_schema

binlog_checksum=NONE

2、创建同步账号

mysql> grant replication slave on *.* to slave@192.168.1.11 identified by '123456' 

3、主库状态

mysql>
mysql>
+------------------+----------+--------------+------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql-bin.000008 |      337 |              |                  |
+------------------+----------+--------------+------------------+

记录下二进制日志文件名和位置4、从库配置文件配置

# [必须]启用二进制日志
log-bin=mysql-bin
# [必须]服务器唯一ID，默认是1，一般取IP最后一段
server-id=222relay-log-index = slave-relay-bin.index

relay-log = slave-relay-bin

sync_master_info = 1sync_relay_log = 1sync_relay_log_info = 1

5、配置连接主库

mysql>

6、开始同步

mysql>
mysql>

7、正常状态

Slave_IO_Running: Yes
Slave_SQL_Running: Yes

解决主从不同步先上Master库：mysql>show processlist; 查看下进程是否Sleep太多。发现很正常。mysql>show master status; 也正常。mysql> show master status;
+-------------------+----------+--------------+-------------------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+-------------------+----------+--------------+-------------------------------+
| mysqld-bin.000001 | 3260 | | mysql,test,information_schema |
+-------------------+----------+--------------+-------------------------------+
1 row in set (0.00 sec)再到Slave上查看mysql> show slave status\G Slave_IO_Running: YesSlave_SQL_Running: No可见是Slave不同步下面介绍两种解决方法：方法一：忽略错误后，继续同步该方法适用于主从库数据相差不大，或者要求数据可以不完全统一的情况，数据要求不严格的情况解决： stop slave;#表示跳过一步错误，后面的数字可变set global sql_slave_skip_counter =1;start slave;之后再用mysql> show slave status\G 查看：Slave_IO_Running: YesSlave_SQL_Running: Yesok，现在主从同步状态正常方式二：重新做主从，完全同步该方法适用于主从库数据相差较大，或者要求数据完全统一的情况解决步骤如下：1.先进入主库，进行锁表，防止数据写入使用命令：mysql> flush tables with read lock;注意：该处是锁定为只读状态，语句不区分大小写2.进行数据备份 #把数据备份到mysql.bak.sql文件[root@server01 mysql]#mysqldump -uroot -p -hlocalhost > mysql.bak.sql这里注意一点：数据库备份一定要定期进行，确保数据万无一失3.查看master 状态mysql> show master status;
+-------------------+----------+--------------+-------------------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+-------------------+----------+--------------+-------------------------------+
| mysqld-bin.000001 | 3260 | | mysql,test,information_schema |
+-------------------+----------+--------------+-------------------------------+
1 row in set (0.00 sec)4.把mysql备份文件传到从库机器，进行数据恢复#使用scp命令[root@server01 mysql]# scp mysql.bak.sql root@192.168.128.11:/tmp/5.停止从库的状态mysql> stop slave;6.然后到从库执行mysql命令，导入数据备份mysql> source /tmp/mysql.bak.sql7.设置从库同步，注意该处的同步点，就是主库show master status信息里的| File| Position两项change master to master_host = '192.168.128.10', master_user = 'slave', master_port=3306, master_password='123456', master_log_file = 'mysqld-bin.000001', master_log_pos=3260;8.重新开启从同步mysql> start slave;9.查看同步状态mysql> show slave status\G 查看：Slave_IO_Running: YesSlave_SQL_Running: Yes