主库（Master）：CentOS release 5.9 x86_64
IP:10.45.172.40
mysql Ver 14.12 Distrib 5.0.95
从库CentOS release 5.9 x86_64
IP:10.45.172.37
mysql Ver 14.12 Distrib 5.0.95,
测试是不是安装mysql：service mysql restart 或servicemysqld restart
安装mysql安装：
在官方网站下载以下安装包 http://dev.mysql.com/downloads/mysql#downloads
rpm -ivh MySQL-server⑸.5.25a⑴.rhel5.x86_64 MySQL-client⑸.5.25a⑴.rhel5.x86_64 MySQL-devel⑸.5.25a⑴.rhel5.x86_64
设置修改密码 /usr/bin/mysqladmin -u root password‘rootadmin’
1.查看主库服务器/usr/share/mysql目录下的cnf文件
#ll /usr/share/mysql/*.cnf
其中.cnf文档以下：
my-small.cnf 内存少于或等于64M，只提供很少的的数据库服务
my-medium.cnf 内存在32M-⑹4M之间而且和其他服务1起使用，例如web
my-large.cnf 内存有512M主要提供数据库服务
my-huge.cnf 内存有1G到2G，主要提供数据库服务
my-innodb-heavy⑷G.cnf 内存有4G，主要提供较大负载数据库服务（1般服务器都使用这个）
2.复制文件到/etc下并更名为my.cnf
#cp /usr/share/mysql/my-innodb-heavy⑷G.cnf/etc/my.cnf
3.修改my.cnf
#vi /etc/my.cnf 修改以下参数：
server-id = 1
log-bin=mysql-bin
binlog-do-db=test#需要同步的数据库，如果同步多个库，需要配置多行
配置完重启：
service mysql restart
4．建立同步用的数据库账户
mysql> grant replication slave on *.* to'testuser'@'10.45.172.37' identified by 'test123';
Query OK, 0 rows affected (0.00 sec)
5．锁住主库表，停止数据更新。
mysql> flush tables with read lock;
6．显示主库信息并记录
mysql> show master status;
+------------------+----------+--------------+------------------+
| File | Position | Binlog_Do_DB |Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql-bin.000001 | 566 | | |
+------------------+----------+--------------+------------------+
1 row in set (0.00 sec)
将上面的日志名mysql-bin.000001和位置566记录下来，从库配置时要用到
7．备份所有库文件并复制到从库服务器上
在从库上履行：
cd /var/lib/mysql
mkdir /tmp/bak
mv */tmp/bak
备份后，从主库复制过来：
scp -r root@10.45.172.40:/var/lib/mysql/*./
8．数据库复制完成后对主库所有表解锁
#unlock tables;
1．修改配置文件：
#vi /etc/my.cnf
server-id = 2 将这个ID号改成2
log-bin=mysql-bin 此项如果开启建议关闭
master-host = 10.45.172.40 配置主库的IP
master-user = testuser 同步用的账户
master-password = test123 同步用的账户密码
master-port = 3306 同步数据库的端口号
2.调剂权限
#chown -R mysql:mysql /var/lib/mysql
3．重启mysql服务
#service mysql restart
4．手动同步
mysql>slave stop
mysql> CHANGE MASTER TO
MASTER_HOST='10.45.172.40',
MASTER_USER='testuser',
MASTER_PASSWORD='test123',
MASTER_PORT=3306,
MASTER_LOG_FILE='mysql-bin.000001',
MASTER_LOG_POS=471,
MASTER_CONNECT_RETRY=60;
5．启动从库
mysql>slave start;
6．检查从库是不是正常同步
mysql> show slave status G;
*************************** 1. row***************************
Slave_IO_State: Waiting for master to sendevent
Master_Host: 10.45.172.40
Master_User: testuser
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000001
Read_Master_Log_Pos:471
Relay_Log_File: mysqld-relay-bin.000002
Relay_Log_Pos: 235
Relay_Master_Log_File: mysql-bin.000001
Slave_IO_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:471
Relay_Log_Space: 235
Until_Condition: None
Until_Log_File:
Until_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: 0
1 row in set (0.00 sec)
1．主库履行
mysql> use test
Database changed
mysql> create table tt(id int,namevarchar(20));
Query OK, 0 rows affected (0.00 sec)
mysql> insert into tt values(1,'jhp');
Query OK, 1 row affected (0.00 sec)
2．在从库中检查是不是同步过来：
mysql> select * from test.tt;
+------+------+
| id | name |
+------+------+
| 1 | jhp |
+------+------+
1 row in set (0.00 sec)