竞博体育 > 前端 > 竞博体育官方版下载这里我同步的数据库是TEST

竞博体育官方版下载这里我同步的数据库是TEST

刚刚抽空做了一下MYSQL 的主主同步。
把步骤写下来,至于会出现的什么问题,以后随时更新。这里我同步的数据库是TEST
1、环境描述。
主机:192.168.0.231(A)
主机:192.168.0.232(B)
MYSQL 版本为5.1.21
2、授权用户。
A:
mysql> grant replication slave,file on *.* to 'repl1'@'192.168.0.232' identified
 by '123456';
Query OK, 0 rows affected (0.00 sec)

mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)
B:
mysql> grant replication slave,file on *.* to 'repl2'@'192.168.0.231' identified
 by '123456';
Query OK, 0 rows affected (0.00 sec)

mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)
然后都停止MYSQL 服务器。

3、配置文件。
在两个机器上的my.cnf里面都开启二进制日志 。
A:
user = mysql
log-bin=mysql-bin
server-id       = 1
binlog-do-db=test
binlog-ignore-db=mysql
replicate-do-db=test
replicate-ignore-db=mysql
log-slave-updates
slave-skip-errors=all

skip-name-resolve

sync_binlog=1
auto_increment_increment=2
auto_increment_offset=1

B:
user = mysql
log-bin=mysql-bin
server-id       = 2
binlog-do-db=test
binlog-ignore-db=mysql
replicate-do-db=test
replicate-ignore-db=mysql
log-slave-updates
slave-skip-errors=all

skip-name-resolve

sync_binlog=1
auto_increment_increment=2
auto_increment_offset=2
至于这些参数的说明具体看手册。
红色的部分非常重要,如果一个MASTER 挂掉的话,另外一个马上接管。
紫红色的部分指的是服务器频繁的刷新日志。这个保证了在其中一台挂掉的话,日志刷新到另外一台。从而保证了数据的同步 。
4、重新启动MYSQL服务器。
在A和B上执行相同的步骤
[[email protected] ~]# /usr/local/mysql/bin/mysqld_safe &
[1] 4264
[[email protected]竞博体育官方版下载 , ~]# 071213 14:53:20 mysqld_safe Logging to '/usr/local/mysql/data/localhost.localdomain.err'.
/usr/local/mysql/bin/mysqld_safe: line 366: [: -eq: unary operator expected
071213 14:53:20 mysqld_safe Starting mysqld daemon with databases from /usr/local/mysql/data

5、进入MYSQL的SHELL。
A:
mysql> flush tables with read lockG
Query OK, 0 rows affected (0.00 sec)

mysql> show master statusG
***************************

  1. row ***************************
    File: mysql-bin.000007
    Position: 528
    Binlog_Do_DB: test
    Binlog_Ignore_DB: mysql
    1 row in set (0.00 sec)

B:
mysql> flush tables with read lock;
Query OK, 0 rows affected (0.00 sec)

mysql> show master statusG
***************************

  1. row ***************************
    File: mysql-bin.000004
    Position: 595
    Binlog_Do_DB: test
    Binlog_Ignore_DB: mysql
    1 row in set (0.00 sec)
    然后备份自己的数据,保持两个机器的数据一致。
    方法很多。完了后看下一步。
    6、在各自机器上执行CHANGE MASTER TO命令。
    A:
    mysql> change master to
        -> master_host='192.168.0.232',
        -> master_user='repl2',
        -> master_password='123456',
        -> master_log_file='mysql-bin.000004',
        -> master_log_pos=595;
    Query OK, 0 rows affected (0.01 sec)
    mysql> start slave;
    Query OK, 0 rows affected (0.00 sec)

B:
mysql> change master to
    -> master_host='192.168.0.231',
    -> master_user='repl1',
    -> master_password='123456',
    -> master_log_file='mysql-bin.000007',
    -> master_log_pos=528;
Query OK, 0 rows affected (0.01 sec)
mysql> start slave;
Query OK, 0 rows affected (0.00 sec)

7、查看各自机器上的IO进程和 SLAVE进程是否都开启。
A:

mysql> show processlistG
***************************

  1. row ***************************
    Id: 2
    User: repl
    Host: 192.168.0.232:54475
    db: NULL
    Command: Binlog Dump
    Time: 1590
    State: Has sent all binlog to slave; waiting for binlog to be updated
    Info: NULL
    ***************************
  2. row ***************************
    Id: 3
    User: system user
    Host: 
    db: NULL
    Command: Connect
    Time: 1350
    State: Waiting for master to send event
    Info: NULL
    ***************************
  3. row ***************************
    Id: 4
    User: system user
    Host: 
    db: NULL
    Command: Connect
    Time: 1149
    State: Has read all relay log; waiting for the slave I/O thread to update it
    Info: NULL
    ***************************
  4. row ***************************
    Id: 5
    User: root
    Host: localhost
    db: test
    Command: Query
    Time: 0
    State: NULL
    Info: show processlist
    4 rows in set (0.00 sec)

B:

mysql> show processlistG
***************************

  1. row ***************************
    Id: 1
    User: system user
    Host: 
    db: NULL
    Command: Connect
    Time: 2130
    State: Waiting for master to send event
    Info: NULL
    ***************************
  2. row ***************************
    Id: 2
    User: system user
    Host: 
    db: NULL
    Command: Connect
    Time: 1223
    State: Has read all relay log; waiting for the slave I/O thread to update it
    Info: NULL
    ***************************
  3. row ***************************
    Id: 4
    User: root
    Host: localhost
    db: test
    Command: Query
    Time: 0
    State: NULL
    Info: show processlist
    ***************************
  4. row ***************************
    Id: 5
    User: repl2
    Host: 192.168.0.231:50718
    db: NULL
    Command: Binlog Dump
    Time: 1398
    State: Has sent all binlog to slave; waiting for binlog to be updated
    Info: NULL
    4 rows in set (0.00 sec)

如果红色部分没有出现,检查DATA目录下的错误文件。

8、释放掉各自的锁,然后进行插数据测试。
mysql> unlock tables;
Query OK, 0 rows affected (0.00 sec)

插入之前两个机器表的对比:
A:

mysql> show tables;
+----------------+
| Tables_in_test |
+----------------+
| t11_innodb     | 
| t22            | 
+----------------+
B:

mysql> show tables;
+----------------+
| Tables_in_test |
+----------------+
| t11_innodb     | 
| t22            | 
+----------------+
从A机器上进行插入
A:
mysql> create table t11_replicas
    -> (id int not null auto_increment primary key,
    -> str varchar(255) not null) engine myisam;
Query OK, 0 rows affected (0.01 sec)

mysql> insert into t11_replicas(str) values
    -> ('This is a master to master test table');
Query OK, 1 row affected (0.01 sec)

mysql> show tables;
+----------------+
| Tables_in_test |
+----------------+
| t11_innodb     | 
| t11_replicas   | 
| t22            | 
+----------------+
3 rows in set (0.00 sec)

mysql> select * from t11_replicas;
+----+---------------------------------------+
| id | str                                   |
+----+---------------------------------------+
|  1 | This is a master to master test table | 
+----+---------------------------------------+
1 row in set (0.00 sec)

现在来看B机器:

mysql> show tables;
+----------------+
| Tables_in_test |
+----------------+
| t11_innodb     | 
| t11_replicas   | 
| t22            | 
+----------------+
3 rows in set (0.00 sec)

mysql> select * from t11_replicas;
+----+---------------------------------------+
| id | str                                   |
+----+---------------------------------------+
|  1 | This is a master to master test table | 
+----+---------------------------------------+
1 row in set (0.00 sec)

现在反过来从B机器上插入数据:
B:

mysql> insert into t11_replicas(str) values('This is a test 2');
Query OK, 1 row affected (0.00 sec)

mysql> select * from t11_replicas;
+----+---------------------------------------+
| id | str                                   |
+----+---------------------------------------+
|  1 | This is a master to master test table | 
|  2 | This is a test 2                      | 
+----+---------------------------------------+
2 rows in set (0.00 sec)
我们来看A
A:
mysql> select * from t11_replicas;
+----+---------------------------------------+
| id | str                                   |
+----+---------------------------------------+
|  1 | This is a master to master test table | 
|  2 | This is a test 2                      | 
+----+---------------------------------------+
2 rows in set (0.00 sec)

好了。现在两个表互相为MASTER。

的主主同步。 把步骤写下来,至于会出现的什么问题,以后随时更新。这里我同步的数据库是TEST 1、环境描述。 主...

  • 首页
  • 电话
  • 软件