主从同步配置

1、MySQL主从同步配置2009-12-21 13:55一、环境        主机：                   master操作系统：centos 5.3              

2、0;    IP：192.168.1.222                   MySQL版本：5.0.77         从机：           slave操作系统：centos 5.3 IP：192

3、.168.1.220                   MySQL版本：5.0.77二、创建数据库分别登录master机和slave机的mysql：mysql u root p创建数据库：create database repl;三、master机和slave机的相关配置1、修改master机器中mysql配置文件f，该文件在/etc目录下在mysqld配置段添加如下字段server-id=1log-bin=logbinlo

4、g-do-db=repl /需要同步的数据库，如果没有本行，即表示同步所有的数据库binlog-ignore-db=mysql /被忽略的数据库在master机上为slave机添加一同步帐号grant replication slave on *.* to 'repl''192.1681.220' identified by 'acme123'重启master机的mysql服务：service mysqld restart用show master status 命令看日志情况mysql>show master status;+-+-+-+-

5、+| File | Position     | Binlog_Do_DB   | Binlog_Ignore_DB |+-+-+-+-+| log.000003 |           98 | repl                 | mysql  &

6、#160;                 |+-+-+-+-+1 row in set (0.00 sec)2、修改slave机中mysql配置文件同样在mysqld字段下添加如下内容server-id=2master-host=192.168.1.222master-user=replmaster-password=acme123master-port=3306master-connect-retry=60replicate-do-db=re

7、pl /同步的数据库，不写本行 表示 同步所有数据库然后重启slave机的mysql 在slave机中进入mysqlmysql>start slave;mysql>show slave statusG;如果Slave_IO_Running、Slave_SQL_Running状态为Yes则表明设置成功。三、出现的问题当我在执行start slave这条命令时，系统提示ERROR 1200 (HY000): The server is not configured as slave; fix in config file or with CHANGE MASTER TO，执行show

8、slave status;又提示Empty set (0.00 sec)，想不通问题在哪里后来发现，原来slave已经默认开启，要先关闭再开启执行 slave stop;再执行change master to master_host='192.168.1.222',master_user='repl',master_password='acme123', master_log_file='log.000003' ,master_log_pos=98;然后执行 slave start;这时 再执行show slave statusG

9、显示如下：* 1. row * Slave_IO_State: Waiting for master to send event Master_Host: 192.168.1.222 Master_User: repl Master_Port: 3306 Connect_Retry: 60 Master_Log_File: log.000003 Read_Master_Log_Pos: 98 Relay_Log_File: mysqld-relay-bin.000002 Relay_Log_Pos: 229 Relay_Master_Log_File: log.000003 Slave_IO_

10、Running: Yes Slave_SQL_Running: Yes Replicate_Do_DB: Replicate_Ignore_DB: Replicate_Do_Table: Replicate_Ignore_Table: Replicate_Wild_Do_Table: Replicate_Wild_Ignore_Table: Last_Errno: 0 Last_Error: Skip_Counter: 0 Exec_Master_Log_Pos: 98 Relay_Log_Space: 229 Until_Condition: None Until_Log_File: Unt

11、il_Log_Pos: 0 Master_SSL_Allowed: No Master_SSL_CA_File: Master_SSL_CA_Path: Master_SSL_Cert: Master_SSL_Cipher: Master_SSL_Key: Seconds_Behind_Master: 01 row in set (0.00 sec)显示红色那两行，说明配置成功。四、测试主从服务器是否能同步在主服务器上面新建一个表，必须在repl数据下mysql> use replDatabase changedmysql> create table test(id int,nam

12、e char(10);Query OK, 0 rows affected (0.00 sec)mysql> insert into test values(1,'zaq');Query OK, 1 row affected (0.00 sec)mysql> insert into test values(1,'xsw');Query OK, 1 row affected (0.00 sec)mysql> select * from test;+-+-+| id | name |+-+-+| 1    | zaq   | | 1    | xsw |