Mysql Master/Slave模式实战

**1.master上授权给slave ** mysql>grant all on *.* to repadmin@’218.6.67.75′ identified by ‘backup’; mysql>flush privileges; mysql>use abs; mysql>create table mysqlslave (status char(8)); mysql>insert into mysqlslave values (‘aaaa’);

2.shutdown master mysqladmin -u root shutdown

3.拷贝数据文件 直接把数据文件夹打包拷贝到slave去。

4.修改Master的my.cnf文件，在[mysqld]处增加 master /etc/my.cnf: log-bin server-id = 1 sql-bin-update-same binlog-do-db = abs

5.修改Slave的my.cnf文件 server-id       = 2 master-host     = 218.6.67.68 master-user     = backup master-password = backup master-port     = 3306 master-connect-retry    = 60 replicate-wild-do-table= ads.%

6.启动slave

7.启动master

8.测试 向其中的测试表里插入一条记录,如 use ads; insert into mysqlslave values  ((CURDATE() + 0)); 再在slave里查看是否有此记录

9.问题 a)ERROR1062  Duplicate entry mysql> slave stop; mysql> set GLOBAL SQL_SLAVE_SKIP_COUNTER=1; mysql> slave start; Use the value 1 for any SQL statement that does not use AUTO_INCREMENT or LAST_INSERT_ID(), otherwise you will need to use the value 2. Statements that use AUTO_INCREMENT or LAST_INSERT_ID() take up 2 events in the binary log.

b)调试命令 show processlist; slave stop; show slave status; show master status; flush master; flush slave; reset slave; reset master; slave start; set global sql_slave_skip_counter=1;

参考资料 介绍几个管理Replication的命令：

1. PURGE MASTER LOG Replication需要生成大量的二进制文件，用以记录Client在Master上的操作，日积月累，这些文件会占据相当大的空间，可以用PURGE MASTER LOG命令来删除它们。

mysql> SHOW MASTER LOGS; +—————-+ | Log_name | +—————-+ | binary-log.001 | | binary-log.002 | | binary-log.003 | | binary-log.004 | +—————-+ 4 rows in set (0.02 sec)

mysql> PURGE MASTER LOGS TO ‘binary-log.004’;

之后binary-log.001至binary-log.003三个文件都将被删除。

2. SQL_SLAVE_SKIP_COUNTER 如果Replication在Slave上出现错误而停止，一般都期望Slave能忽略这个错误，继续进行同步，而不是重新启动Slave。

In MySQL 3.23.xx: mysql> SET SQL_SLAVE_SKIP_COUNTER=1 mysql> SLAVE START

In Versions 4.0.0-4.0.2: mysql> SET SQL_SLAVE_SKIP_COUNTER=1 mysql> SLAVE START SQL_THREAD

In Version 4.0.3 and beyond: mysql> SET GLOBAL SQL_SLAVE_SKIP_COUNTER=1 mysql> SLAVE START SQL_THREAD

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