Home Database Mysql Tutorial 两种方法解决MySQL主从不同步

两种方法解决MySQL主从不同步

Jun 07, 2016 pm 04:16 PM
mysql Synchronize method solve

今天发现Mysql的主从数据库没有同步 先上Master库: mysqlshow processlist; 查看下进程是否Sleep太多。发现很正常。 show master status; 也正常。 mysql show master status; +-------------------+----------+--------------+---------------------------

  今天发现Mysql的主从数据库没有同步

  先上Master库:

  mysql>show processlist; 查看下进程是否Sleep太多。发现很正常。

  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 statusG

  Slave_IO_Running: Yes

  Slave_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 statusG 查看:

  Slave_IO_Running: Yes

  Slave_SQL_Running: Yes

  ok,现在主从同步状态正常了。。。

  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

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