一、MYSQL主从复制工作原理
主从同步机制：
1、外部数据更新，可以是web服务器，也可以是其他的更新语句。
2、数据增加，删除，更改一系列变化会记录到mysql的binlog中。
3、从服务器上的I/O线程读取主数据库上的binlog日志。
4、拷贝主数据库上的binlog日志到从数据库上的中继日志（relay log）。
5、从数据库上的SQL线程读取中继日志。
6、通过replay中继日志，在从数据库上再执行一遍。
这就是整个主从同步的一个过程。
二、实验步骤
系统：Centos6.4-x86_64
主服务器：node1:172.16.2.1
从服务器：node2:172.16.2.16
Mysql版本：mysql-5.5.33
Mysql的主从复制：
操作思路：
主服务器：
1.创建具有复制权限的用户帐号
2.设置server-id
3.启动二进制日志
从服务器：
1.启动中继日志
2.设置server-id
3.启动复制线程
同步主从服务器时间：用yum安装ansible的rpm包
[root@node1 ~]# vim /etc/ansible/hosts [hac] 172.16.2.1 172.16.2.16 [root@node1 ~]# ansible all -a 'ntpdate 172.16.0.1' 172.16.2.16 | success | rc=0 >> 22 Sep 20:40:50 ntpdate[2637]: step time server 172.16.0.1 offset 2676.843737 sec 172.16.2.1 | success | rc=0 >> 22 Sep 20:40:50 ntpdate[3045]: step time server 172.16.0.1 offset 2675.977884 sec [root@node1 ~]# ansible all -a 'date' 172.16.2.16 | success | rc=0 >> Sun Sep 22 20:41:15 CST 2013 172.16.2.1 | success | rc=0 >> Sun Sep 22 20:41:15 CST 2013
在主从服务器上安装Mysql过程不在介绍，请参考http://pangge.blog.51cto.com/6013757/1059896
安装过程注意文件权限要设置正确
配置主服务器：
1.编译配置文件：
[root@node1 ~]# vim /etc/my.cnf [mysqld] datadir = /mydata/data/ //数据存放目录 innodb_file_per_table = 1//设置每表单个表空间 log-bin=/mydata/data/mysql-bin //二进制日志存放位置，写绝对路径避免主从复制出现错误 server-id = 1 //server-id的值一定要和从服务器的server-id号区分开来
启动mysql服务
[root@node1 data]# service mysqld start
Starting MySQL..
2.创建具有复制权限的用户帐号
[root@node1 ~]# mysql mysql> grant replication client,replication slave on *.* to hailian@'172.16.%.%' identified by 'hailian'; Query OK, 0 rows affected (0.00 sec) mysql> flush privileges; Query OK, 0 rows affected (0.00 sec)
配置从服务器：
1.编辑配置文件
[root@node2 ~]# vim /etc/my.cnf [mysqld] datadir = /mydata/data/ //数据存放目录 innodb_file_per_table = 1//设置每表单个表空间 log-bin=/mydata/data/mysql-bin //二进制日志存放位置，写绝对路径避免主从复制出现错误 server-id = 20 //server-id的值一定要和从服务器的server-id号区分开来 relay-log=/mydata/data/relay-bin //中继日志 read-only=1 //从服务器设置为只读服务器
2.登录Mysql查看启动线程
[root@node2 ~]# mysql
mysql> show processlist;
+----+------+-----------+------+---------+------+-------+------------------+
| Id | User | Host | db | Command | Time | State | Info |
+----+------+-----------+------+---------+------+-------+------------------+
| 1 | root | localhost | NULL | Query | 0 | NULL | show processlist |
+----+------+-----------+------+---------+------+-------+------------------+
1 row in set (0.00 sec)
mysql> show slave status\G
Empty set (0.00 sec) //说明从服务器还没有开始启用
mysql> help change master to
Name: 'CHANGE MASTER TO'
Description:
Syntax:
CHANGE MASTER TO option [, option] ...
option:
MASTER_BIND = 'interface_name' #将控制绑定到哪个接口上
| MASTER_HOST = 'host_name' #主服务器地址
| MASTER_USER = 'user_name' #具有复制权限的用户
| MASTER_PASSWORD = 'password' #具有复制权限用户的密码
| MASTER_PORT = port_num
| MASTER_CONNECT_RETRY = interval
| MASTER_HEARTBEAT_PERIOD = interval
| MASTER_LOG_FILE = 'master_log_name' #指定从哪一个二进制日志文件开始复制
| MASTER_LOG_POS = master_log_pos #二进制日志事件的位置
| RELAY_LOG_FILE = 'relay_log_name' #中继日志
| RELAY_LOG_POS = relay_log_pos
| MASTER_SSL = {0|1} #是否使用ssl功能
| MASTER_SSL_CA = 'ca_file_name'
| MASTER_SSL_CAPATH = 'ca_directory_name'
| MASTER_SSL_CERT = 'cert_file_name'
| MASTER_SSL_KEY = 'key_file_name'
| MASTER_SSL_CIPHER = 'cipher_list'
| MASTER_SSL_VERIFY_SERVER_CERT = {0|1}
| IGNORE_SERVER_IDS = (server_id_list)
配置从服务器连接主服务器
mysql> change master to master_host='172.16.2.1',
-> master_user='hailian',
-> master_password='hailian',
-> master_log_file='mysql-bin.000004',
-> master_log_pos=354;
Query OK, 0 rows affected (0.02 sec)
启动从服务器线程
mysql> start slave;
Query OK, 0 rows affected (0.00 sec)
mysql> show slave status\G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 172.16.2.1
Master_User: hailian
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000004
Read_Master_Log_Pos: 354
Relay_Log_File: relay-bin.000002
Relay_Log_Pos: 253
Relay_Master_Log_File: mysql-bin.000004
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: 354
Relay_Log_Space: 403
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
Master_SSL_Verify_Server_Cert: No
Last_IO_Errno: 0
Last_IO_Error:
Last_SQL_Errno: 0
Last_SQL_Error:
Replicate_Ignore_Server_Ids:
Master_Server_Id: 1
1 row in set (0.00 sec)
测试
在主服务器上创建数据库testdb
mysql> create database testdb; Query OK, 1 row affected (0.00 sec) mysql> show databases; +--------------------+ | Database | +--------------------+ | information_schema | | mysql | | performance_schema | | test | | testdb | +--------------------+ 5 rows in set (0.00 sec)
从服务器上进行查看
mysql> show databases; +--------------------+ | Database | +--------------------+ | information_schema | | mysql | | performance_schema | | test | | testdb | +--------------------+ 5 rows in set (0.00 sec)
验证成功，实现了主从复制
三、如何在主服务器运行了一段时间后，实现主从复制
对从服务器从新进行初始化，其他配置不变
[root@node2 ~]# service mysqld stop Shutting down MySQL. [OK] [root@node2 mysql]# ./scripts/mysql_install_db --user=mysql --datadir=/mydata/data/ [root@node2 data]# chown -R mysql.mysql ./* [root@node2 ~]# service mysqld start Starting MySQL.. [ OK ]
首先在主服务器上完全备份数据，然后将数据导入到从服务器上
在主服务器上进行完全备份
[root@node1 data]# mysqldump -uroot --lock-all-tables --master-data=2 --events --all-databases > /root/all.sql
将备份好的数据复制到从服务器上
[root@node1 data]# scp /root/all.sql node2:/tmp
all.sql
将数据导入到从服务器的mysql中
mysql> source /tmp/all.sql; mysql> show databases; +--------------------+ | Database | +--------------------+ | information_schema | | mysql | | performance_schema | | test | | testdb | +--------------------+ 5 rows in set (0.00 sec)
此时查看主服务器上二进制日志文件及其事件位置
mysql> show master status; +------------------+----------+--------------+------------------+ | File | Position | Binlog_Do_DB | Binlog_Ignore_DB | +------------------+----------+--------------+------------------+ | mysql-bin.000005 | 182 | | | +------------------+----------+--------------+------------------+ 1 row in set (0.00 sec) mysql> show grants for hailian@'172.16.%.%'; +-------------------------------------------------------------------------------------------------------------------------------------------------+ | Grants for [email protected].%.% | +-------------------------------------------------------------------------------------------------------------------------------------------------+ | GRANT REPLICATION SLAVE, REPLICATION CLIENT ON *.* TO 'hailian'@'172.16.%.%' IDENTIFIED BY PASSWORD '*EAC0439681AAEB5A29A1B15EB26A89F369F943B7' | +-------------------------------------------------------------------------------------------------------------------------------------------------+ 1 row in set (0.00 sec)
在从服务器上配置连接主服务器
mysql> show slave status;
Empty set (0.00 sec)
mysql> change master to master_host='172.16.2.1',
-> master_user='hailian',
-> master_password='hailian',
-> master_log_file='mysql-bin.000005',
-> master_log_pos=182;
Query OK, 0 rows affected (0.01 sec)
启动从服务器
mysql> start slave;
Query OK, 0 rows affected (0.00 sec)
查看从服务器状态
mysql> show slave status\G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 172.16.2.1
Master_User: hailian
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000005
Read_Master_Log_Pos: 182
Relay_Log_File: relay-bin.000002
Relay_Log_Pos: 253
Relay_Master_Log_File: mysql-bin.000005
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: 182
Relay_Log_Space: 403
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
Master_SSL_Verify_Server_Cert: No
Last_IO_Errno: 0
Last_IO_Error:
Last_SQL_Errno: 0
Last_SQL_Error:
Replicate_Ignore_Server_Ids:
Master_Server_Id: 1
1 row in set (0.00 sec)
测试
在主服务上做一下修改
mysql> show databases; +--------------------+ | Database | +--------------------+ | information_schema | | mysql | | performance_schema | | test | | testdb | +--------------------+ 5 rows in set (0.00 sec) mysql> use testdb; Database changed mysql> create table tb1(id int); Query OK, 0 rows affected (0.03 sec) mysql> insert into tb1 values (1),(2); Query OK, 2 rows affected (0.00 sec) Records: 2 Duplicates: 0 Warnings: 0 mysql> select * from tb1; +------+ | id | +------+ | 1 | | 2 | +------+ 2 rows in set (0.04 sec)
查看从服务器
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| test |
| testdb |
+--------------------+
5 rows in set (0.00 sec)
mysql> use testdb;
Database changed
mysql> show tables
-> ;
+------------------+
| Tables_in_testdb |
+------------------+
| tb1 |
+------------------+
1 row in set (0.00 sec)
mysql> select * from tb1;
+------+
| id |
+------+
| 1 |
| 2 |
+------+
2 rows in set (0.03 sec)
验证成功，实现了主从复制
四、如何实现半同步复制
1、分别在主从节点上安装相关的插件
主节点上：
mysql> install plugin rpl_semi_sync_master soname 'semisync_master.so'; Query OK, 0 rows affected (0.02 sec) mysql> show global variables like '%semi%'; +------------------------------------+-------+ | Variable_name | Value | +------------------------------------+-------+ | rpl_semi_sync_master_enabled | OFF | | rpl_semi_sync_master_timeout | 10000 | | rpl_semi_sync_master_trace_level | 32 | | rpl_semi_sync_master_wait_no_slave | ON | +------------------------------------+-------+ 4 rows in set (0.00 sec)
从节点上：
mysql> install plugin rpl_semi_sync_slave soname 'semisync_slave.so'; Query OK, 0 rows affected (0.06 sec) mysql> show global variables like '%semi%'; +---------------------------------+-------+ | Variable_name | Value | +---------------------------------+-------+ | rpl_semi_sync_slave_enabled | OFF | | rpl_semi_sync_slave_trace_level | 32 | +---------------------------------+-------+ 2 rows in set (0.00 sec)
2、启用半同步复制
在主服务上
mysql> SET GLOBAL rpl_semi_sync_master_enabled = ON;
Query OK, 0 rows affected (0.00 sec)
在从服务器上
mysql> SET GLOBAL rpl_semi_sync_slave_enabled = ON;
Query OK, 0 rows affected (0.00 sec)
mysql> stop slave;
Query OK, 0 rows affected (0.02 sec)
mysql> start slave;
Query OK, 0 rows affected (0.00 sec)
3、确认半同步功能已经启用
在主服务上
mysql> show global status like '%semi%'; +--------------------------------------------+-------+ | Variable_name | Value | +--------------------------------------------+-------+ | Rpl_semi_sync_master_clients | 1 | | Rpl_semi_sync_master_net_avg_wait_time | 0 | | Rpl_semi_sync_master_net_wait_time | 0 | | Rpl_semi_sync_master_net_waits | 0 | | Rpl_semi_sync_master_no_times | 0 | | Rpl_semi_sync_master_no_tx | 0 | | Rpl_semi_sync_master_status | ON | | Rpl_semi_sync_master_timefunc_failures | 0 | | Rpl_semi_sync_master_tx_avg_wait_time | 0 | | Rpl_semi_sync_master_tx_wait_time | 0 | | Rpl_semi_sync_master_tx_waits | 0 | | Rpl_semi_sync_master_wait_pos_backtraverse | 0 | | Rpl_semi_sync_master_wait_sessions | 0 | | Rpl_semi_sync_master_yes_tx | 0 | +--------------------------------------------+-------+ 14 rows in set (0.00 sec)
在从服务上
mysql> show global status like '%semi%'; +----------------------------+-------+ | Variable_name | Value | +----------------------------+-------+ | Rpl_semi_sync_slave_status | ON | +----------------------------+-------+ 1 row in set (0.00 sec)
测试
在主服务上
mysql> show databases; +--------------------+ | Database | +--------------------+ | information_schema | | mysql | | performance_schema | | test | | testdb | +--------------------+ 5 rows in set (0.00 sec) mysql> use testdb; Database changed mysql> create table tb2(name char(10)); Query OK, 0 rows affected (0.07 sec)
在从服务器上查看
mysql> use testdb; Database changed mysql> show tables; +------------------+ | Tables_in_testdb | +------------------+ | tb1 | | tb2 | +------------------+ 2 rows in set (0.00 sec) mysql> desc tb2; +-------+----------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +-------+----------+------+-----+---------+-------+ | name | char(10) | YES | | NULL | | +-------+----------+------+-----+---------+-------+ 1 row in set (0.00 sec)
在主服务器上
mysql> show global status like '%semi%';
+--------------------------------------------+-------+
| Variable_name | Value |
+--------------------------------------------+-------+
| Rpl_semi_sync_master_clients | 1 |
| Rpl_semi_sync_master_net_avg_wait_time | 398 |
| Rpl_semi_sync_master_net_wait_time | 398 |
| Rpl_semi_sync_master_net_waits | 1 |
| Rpl_semi_sync_master_no_times | 0 |
| Rpl_semi_sync_master_no_tx | 0 |
| Rpl_semi_sync_master_status | ON |
| Rpl_semi_sync_master_timefunc_failures | 0 |
| Rpl_semi_sync_master_tx_avg_wait_time | 293 |
| Rpl_semi_sync_master_tx_wait_time | 293 |
| Rpl_semi_sync_master_tx_waits | 1 |
| Rpl_semi_sync_master_wait_pos_backtraverse | 0 |
| Rpl_semi_sync_master_wait_sessions | 0 |
| Rpl_semi_sync_master_yes_tx | 1 |
+--------------------------------------------+-------+
14 rows in set (0.00 sec)
mysql> insert into tb2 values ('hailian');
Query OK, 1 row affected (0.00 sec)
mysql> show global status like '%semi%';
+--------------------------------------------+-------+
| Variable_name | Value |
+--------------------------------------------+-------+
| Rpl_semi_sync_master_clients | 1 |
| Rpl_semi_sync_master_net_avg_wait_time | 439 |
| Rpl_semi_sync_master_net_wait_time | 879 |
| Rpl_semi_sync_master_net_waits | 2 |
| Rpl_semi_sync_master_no_times | 0 |
| Rpl_semi_sync_master_no_tx | 0 |
| Rpl_semi_sync_master_status | ON |
| Rpl_semi_sync_master_timefunc_failures | 0 |
| Rpl_semi_sync_master_tx_avg_wait_time | 293 |
| Rpl_semi_sync_master_tx_wait_time | 293 |
| Rpl_semi_sync_master_tx_waits | 1 |
| Rpl_semi_sync_master_wait_pos_backtraverse | 0 |
| Rpl_semi_sync_master_wait_sessions | 0 |
| Rpl_semi_sync_master_yes_tx | 2 |
+--------------------------------------------+-------+
14 rows in set (0.00 sec)
操作完成
注意要想实现半同步复制的永久有效，需要编辑配置文件，将设置的参数放到配置文件/etc/my.cnf中
五、基于ssl的mysql主从复制
在主服务器上自建CA，然后分为为主从服务器颁发证书，详细操作过程请参考http://lanlian.blog.51cto.com/6790106/1281720在这里就不再介绍
讲解配置过程
在主服务器上开启ssl功能
在[mydqld]字段中添加如下内容
ssl
ssl_ca = /etc/pki/CA/cacert.pem
ssl_cert = /usr/local/mysql/ssl/master.crt
ssl_key = /usr/local/mysql/ssl/master.key
重启服务后验证ssl是否开启成功
mysql> show global variables like '%ssl%'; +---------------+---------------------------------+ | Variable_name | Value | +---------------+---------------------------------+ | have_openssl | YES | | have_ssl | YES | | ssl_ca | /etc/pki/CA/cacert.pem | | ssl_capath | | | ssl_cert | /usr/local/mysql/ssl/master.crt | | ssl_cipher | | | ssl_key | /usr/local/mysql/ssl/master.key | +---------------+---------------------------------+ 7 rows in set (0.00 sec)
注意无论在master服务器还是在slave服务器上一定要修改ssl目录及其文件的属主属组为mysql
在主服务器上创建允许ssl连接的用户
mysql> grant replication client,replication slave on *.* to [email protected] identified by 'redhat' require ssl;
Query OK, 0 rows affected (0.03 sec)
从服务器上开启ssl功能
[mysqld] port = 3306 socket = /tmp/mysql.sock skip-external-locking key_buffer_size = 256M max_allowed_packet = 1M table_open_cache = 256 sort_buffer_size = 1M read_buffer_size = 1M read_rnd_buffer_size = 4M myisam_sort_buffer_size = 64M thread_cache_size = 8 query_cache_size= 16M # Try number of CPU's*2 for thread_concurrency thread_concurrency = 8 datadir = /mydata/data innodb_file_per_table = 1 ssl
验证ssl是否开启成功
mysql> show global variables like '%ssl%'; +---------------+-------+ | Variable_name | Value | +---------------+-------+ | have_openssl | YES | | have_ssl | YES | | ssl_ca | | | ssl_capath | | | ssl_cert | | | ssl_cipher | | | ssl_key | | +---------------+-------+ 7 rows in set (0.01 sec)
从服务器连接主服务器
mysql> change master tomaster_host='172.16.2.1',
-> master_user='lanlian',
-> master_password='redhat',
-> master_log_file='mysql-bin.000004',
-> master_ssl=1,
->master_ssl_ca='/usr/local/mysql/ssl/cacert.pem',
->master_ssl_cert='/usr/local/mysql/ssl/slave.crt',
-> master_ssl_key='/usr/local/mysql/ssl/slave.key';
mysql> show slave status\G
*************************** 1.row ***************************
Slave_IO_State:
Master_Host: 172.16.18.7
Master_User: rpssl
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000004
Read_Master_Log_Pos: 4
Relay_Log_File:relay-mysql.000001
Relay_Log_Pos: 4
Relay_Master_Log_File: mysql-bin.000004
Slave_IO_Running: No
Slave_SQL_Running: No
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: 4
Relay_Log_Space: 107
Until_Condition: None
Until_Log_File:
Until_Log_Pos: 0
Master_SSL_Allowed: Yes
Master_SSL_CA_File:/usr/local/mysql/ssl/cacert.pem
Master_SSL_CA_Path:
Master_SSL_Cert:/usr/local/mysql/ssl/slave.crt
Master_SSL_Cipher:
Master_SSL_Key:/usr/local/mysql/ssl/slave.key
Seconds_Behind_Master: NULL
Master_SSL_Verify_Server_Cert:No
Last_IO_Errno: 0
Last_IO_Error:
Last_SQL_Errno: 0
Last_SQL_Error:
Replicate_Ignore_Server_Ids:
Master_Server_Id: 0
8、启动从服务器线程：
mysql> start slave;
mysql> show slave status\G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 172.16.2.1
Master_User: lanlian
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000004
Read_Master_Log_Pos: 362
Relay_Log_File: relay-mysql.000002
Relay_Log_Pos: 508
Relay_Master_Log_File: mysql-bin.000004
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: 362
Relay_Log_Space: 660
Until_Condition: None
Until_Log_File:
Until_Log_Pos: 0
Master_SSL_Allowed: Yes
Master_SSL_CA_File: /usr/local/mysql/ssl/cacert.pem
Master_SSL_CA_Path:
Master_SSL_Cert:/usr/local/mysql/ssl/slave.crt
Master_SSL_Cipher:
Master_SSL_Key: /usr/local/mysql/ssl/slave.key
Seconds_Behind_Master: 0
Master_SSL_Verify_Server_Cert: No
Last_IO_Errno: 0
Last_IO_Error:
Last_SQL_Errno: 0
Last_SQL_Error:
Replicate_Ignore_Server_Ids:
Master_Server_Id: 1
[root@node2 ssl]#mysql --ssl-ca=/usr/local/mysql/ssl/cacert.pem --ssl-cert=/usr/local/mysql/ssl/slave.crt--ssl-key=/usr/local/mysql/ssl/slave.key -urpssl -h172.16.2.1 –predhat
mysql> \s
--------------
mysql Ver 14.14 Distrib5.5.33, for linux2.6 (x86_64) using readline 5.1
Connection id: 3
Current database:
Current user: [email protected]
SSL: Cipher inuse is DHE-RSA-AES256-SHA #基于ssl已可用
Current pager: stdout
Using outfile: ''
Using delimiter: ;
Server version: 5.5.33-logMySQL Community Server (GPL)
Protocol version: 10
Connection: 172.16.2.1via TCP/IP
Server characterset: latin1
Db characterset: latin1
Client characterset: utf8
Conn. characterset: utf8
TCP port: 3306
Uptime: 29 min 24sec
Threads: 3 Questions:14 Slow queries: 0 Opens: 33 Flush tables: 1 Open tables:26 Queries per second avg: 0.007
操作完成！
总结：以上是Mysql主从复制操作过程，深刻理解，熟练操作是非常必要的，不足之处多多指点！