mysql 主从数据库配置
首先设置MySQL主服务器: 在主服务器上为从服务器建立一个用户: 1.grant replication slave on *.* to 192.168.0.1 identified by '1234'; #4.1以后用这个,以前可以用 file. #grant file on *.* to 192.168.0.1 identified by '1234'; #后来我又加了super和
首先设置MySQL主服务器:
在主服务器上为从服务器建立一个用户:
1.grant replication slave on *.* to 192.168.0.1 identified by '1234';
#4.1以后用这个,以前可以用 file.
#grant file on *.* to 192.168.0.1 identified by '1234';
#后来我又加了super和client save权限,可以先不加.然后再试.
配置文件:/etc/my.cnf
2.主服务器上
server-id = 1
log-bin
binlog-do-db=需要备份的数据库名,如果备份多个数据库,,重复设置这个选项即可
binlog-ignore-db=不需要备份的数据库苦命,如果备份多个数据库,重复设置这个选项即可
3.从服务器上
log-bin
server-id=2
master-host=主机
master-user=用户名
master-password=密码
master-port=端口
replicate-do-db=需要备份的数据库名,如果备份多个数据库,重复设置这个选项即可
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
就这么简单照上面的配置就可以了.
主服务器上的相关命令:
show master status
show slave hosts
show logs
show binlog events
purge logs to 'log_name'
purge logs before 'date'
reset master(老版本flush master)
set sql_log_bin=
从服务器上的相关命令:
slave start
slave stop
SLAVE STOP IO_THREAD //此线程把master段的日志写到本地
SLAVE start IO_THREAD
SLAVE STOP SQL_THREAD //此线程把写到本地的日志应用于数据库
SLAVE start SQL_THREAD
reset slave
SET GLOBAL SQL_SLAVE_SKIP_COUNTER
load data from master
show slave status(SUPER,REPLICATION CLIENT)
CHANGE MASTER TO MASTER_HOST=, MASTER_PORT=,MASTER_USER=, MASTER_PASSWORD= //动态改变master信息
PURGE MASTER [before 'date'] 删除master端已同步过的日志
#
后话:
做实验的时候是给一台运行很久的而且很关键的数据库做备份,遇到的问题两个
1.两个数据库的配置文件不一样.
竟然字体还不一样.无语ing
2.数据库文件不一致问题,这是后来操作中产生的.所以无论主服务器多重要要做从服务器的时候一定把主服务器
停了,把东西拷到从服务器上.
再就是多看看mysql的日志文件,很有帮助的

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