MySQL多源复制【转】

什么是多源复制?

      首先，我们需要清楚 multi-master 与multi-source 复制不是一样的. Multi-Master 复制通常是环形复制，

你可以在任意主机上将数据复制给其他主机。

 
     

       Multi-source 是不同的. MySQL在这个新版本中修复了一个复制限制 , 这限制是一个从站只能有一个主站. 

这是一个在我们设计复制环境中的限制因素，也有一些极客使它正常工作了。但是现在有一个官方的解决办

法了。所以。简单的说， Multi-Source 意味着一个从站能有一个以上主站. 现在, 

像下图一样的复制环境是可能的:

 

     这将帮助我们创建一些复制的层次结构，这在过去是不可能的。 举个例子,你可以 将一个从站放在你的办公室

里。在办公室里从所有主站中复制数据传播到世界各地。

它是怎么工作的呢?

    现在我们有了通信渠道的概念，每一个通信渠道都是一个从服务器从主服务器获得2进制日志的链接。

这意味着每个通信渠道都得有一个IO_THREAD .我们需要运行不同的 “CHANGE MASTER” 命令, 对于

每一个主服务器。我们需要用到 “FOR CHANNEL”这个参数来提供通信链接的名字。

CHANGE MASTER MASTER_HOST='something', MASTER_USER=... FOR CHANNEL="name_of_channel";

    很容易. 有一个单一的先决条件。从服务器需要在mysql5.6上配置安全功能，这意味着信息通常包含在主服

务器上。信息或日志应该在一个表中，让我们开始配置吧

 

注意

与dba交流了下，对于多源复制，还是有些东西要注意的（有说的不对的请指正）：

1. 初次配置耗时较长，需要将各个“master”的数据dump下来，再source到“slave”上；

2. 需要考虑各“master”数据增长频率，“slave”的数据增长频率是这些的总和，如果太高，会导致大量的磁盘IO，造成数据更新延迟，最严重的是会影响正常的查询；

3. 如果多实例中存在同名的库，则同名库的表都会放到一个库中；

4. 如果同名库中的表名相同且结构相同，则数据会到一起；如果结构不同，则先建的有效。

 

 

一从两主:多源复制

　　

每台mysql 服务器都需要加
my.cnf要加两个参数才可以在GTID多源复制
master-info-repository=TABLE
relay-log-info-repository=TABLE

server1:只接受下面两种数据库，这两种数据来源不同的通道,系统表不复制
replicate_do_db=db1
replicate_do_db=db2

server1 连到 slave1 

mysql> change master to master_host='10.24.220.70',master_user='repl',master_password='123',master_port=3306,master_auto_position=1 for channel 'slave1';

server1 连到 slave2 

mysql> change master to master_host='10.169.214.33',master_user='repl',master_password='123',master_port=3306,master_auto_position=1 for channel 'slave2';

server1:
mysql> start slave;    //两个通道一起起动了
Query OK, 0 rows affected (0.02 sec)

mysql> show processlist;
+----+-------------+-----------+------+---------+------+--------------------------------------------------------+------------------+
| Id | User        | Host      | db   | Command | Time | State                                                  | Info             |
+----+-------------+-----------+------+---------+------+--------------------------------------------------------+------------------+
|  2 | root        | localhost | NULL | Query   |    0 | starting                                               | show processlist |
|  8 | system user |           | NULL | Connect |    3 | Waiting for master to send event                       | NULL             |
|  9 | system user |           | NULL | Connect |    3 | Slave has read all relay log; waiting for more updates | NULL             |
| 10 | system user |           | NULL | Connect |    3 | Connecting to master                                   | NULL             |
| 11 | system user |           | NULL | Connect |    3 | Slave has read all relay log; waiting for more updates | NULL             |
+----+-------------+-----------+------+---------+------+--------------------------------------------------------+------------------+
5 rows in set (0.00 sec)

mysql> start slave;
Query OK, 0 rows affected (0.01 sec)

mysql> show slave statusG

*************************** 1. row ***************************

               Slave_IO_State: Waiting for master to send event

                  Master_Host: 10.24.220.70

                  Master_User: repl

                  Master_Port: 3306

                Connect_Retry: 60

              Master_Log_File: log.000001

          Read_Master_Log_Pos: 714

               Relay_Log_File: relay-log-slave1.000002

                Relay_Log_Pos: 642

        Relay_Master_Log_File: log.000001

             Slave_IO_Running: Yes

            Slave_SQL_Running: Yes

              Replicate_Do_DB: db1,db2

          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: 714

              Relay_Log_Space: 850

              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: 101

                  Master_UUID: 1915a42e-ffa2-11e5-a6ca-00163e000601

             Master_Info_File: mysql.slave_master_info

                    SQL_Delay: 0

          SQL_Remaining_Delay: NULL

      Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates

           Master_Retry_Count: 86400

                  Master_Bind: 

      Last_IO_Error_Timestamp: 

     Last_SQL_Error_Timestamp: 

               Master_SSL_Crl: 

           Master_SSL_Crlpath: 

           Retrieved_Gtid_Set: 1915a42e-ffa2-11e5-a6ca-00163e000601:3

            Executed_Gtid_Set: 1915a42e-ffa2-11e5-a6ca-00163e000601:1-3,

191683db-ffa2-11e5-a424-00163e0007d3:1-3,

191f7a9f-ffa2-11e5-a825-00163e00242a:1

                Auto_Position: 1

         Replicate_Rewrite_DB: 

                 Channel_Name: slave1

           Master_TLS_Version: 

*************************** 2. row ***************************

               Slave_IO_State: Waiting for master to send event

                  Master_Host: 10.169.214.33

                  Master_User: repl

                  Master_Port: 3306

                Connect_Retry: 60

              Master_Log_File: bin.000001

          Read_Master_Log_Pos: 714

               Relay_Log_File: relay-log-slave2.000002

                Relay_Log_Pos: 915

        Relay_Master_Log_File: bin.000001

             Slave_IO_Running: Yes

            Slave_SQL_Running: Yes

              Replicate_Do_DB: db1,db2

          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: 714

              Relay_Log_Space: 1123

              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: 102

                  Master_UUID: 191683db-ffa2-11e5-a424-00163e0007d3

             Master_Info_File: mysql.slave_master_info

                    SQL_Delay: 0

          SQL_Remaining_Delay: NULL

      Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates

           Master_Retry_Count: 86400

                  Master_Bind: 

      Last_IO_Error_Timestamp: 

     Last_SQL_Error_Timestamp: 

               Master_SSL_Crl: 

           Master_SSL_Crlpath: 

           Retrieved_Gtid_Set: 191683db-ffa2-11e5-a424-00163e0007d3:1-3

            Executed_Gtid_Set: 1915a42e-ffa2-11e5-a6ca-00163e000601:1-3,

191683db-ffa2-11e5-a424-00163e0007d3:1-3,

191f7a9f-ffa2-11e5-a825-00163e00242a:1

                Auto_Position: 1

         Replicate_Rewrite_DB: 

                 Channel_Name: slave2

           Master_TLS_Version: 

2 rows in set (0.00 sec)

mysql> stop slave;   //两个通道同时停止
Query OK, 0 rows affected (0.03 sec)

mysql> show slave statusG
*************************** 1. row ***************************
               Slave_IO_State: 
                  Master_Host: 10.24.220.70
                  Master_User: repl
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: log.000001
          Read_Master_Log_Pos: 154
               Relay_Log_File: relay-log-slave1.000002
                Relay_Log_Pos: 355
        Relay_Master_Log_File: log.000001
             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: 154
              Relay_Log_Space: 563
              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: 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: 101
                  Master_UUID: 1915a42e-ffa2-11e5-a6ca-00163e000601
             Master_Info_File: mysql.slave_master_info
                    SQL_Delay: 0
          SQL_Remaining_Delay: NULL
      Slave_SQL_Running_State: 
           Master_Retry_Count: 86400
                  Master_Bind: 
      Last_IO_Error_Timestamp: 
     Last_SQL_Error_Timestamp: 
               Master_SSL_Crl: 
           Master_SSL_Crlpath: 
           Retrieved_Gtid_Set: 
            Executed_Gtid_Set: 
                Auto_Position: 1
         Replicate_Rewrite_DB: 
                 Channel_Name: slave1
           Master_TLS_Version: 
*************************** 2. row ***************************
               Slave_IO_State: 
                  Master_Host: 10.169.214.33
                  Master_User: repl
                  Master_Port: 3307
                Connect_Retry: 60
              Master_Log_File: 
          Read_Master_Log_Pos: 4
               Relay_Log_File: relay-log-slave2.000001
                Relay_Log_Pos: 4
        Relay_Master_Log_File: 
             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: 0
              Relay_Log_Space: 154
              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: NULL
Master_SSL_Verify_Server_Cert: No
                Last_IO_Errno: 2003
                Last_IO_Error: error connecting to master 'repl@10.169.214.33:3307' - retry-time: 60  retries: 4
               Last_SQL_Errno: 0
               Last_SQL_Error: 
  Replicate_Ignore_Server_Ids: 
             Master_Server_Id: 0
                  Master_UUID: 
             Master_Info_File: mysql.slave_master_info
                    SQL_Delay: 0
          SQL_Remaining_Delay: NULL
      Slave_SQL_Running_State: 
           Master_Retry_Count: 86400
                  Master_Bind: 
      Last_IO_Error_Timestamp: 160517 12:38:11
     Last_SQL_Error_Timestamp: 
               Master_SSL_Crl: 
           Master_SSL_Crlpath: 
           Retrieved_Gtid_Set: 
            Executed_Gtid_Set: 
                Auto_Position: 1
         Replicate_Rewrite_DB: 
                 Channel_Name: slave2
           Master_TLS_Version: 
2 rows in set (0.00 sec)

mysql> start slave for channel 'slave1';  // 停止单一通道
Query OK, 0 rows affected (0.00 sec)

mysql> show slave statusG
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 10.24.220.70
                  Master_User: repl
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: log.000001
          Read_Master_Log_Pos: 154
               Relay_Log_File: relay-log-slave1.000003
                Relay_Log_Pos: 355
        Relay_Master_Log_File: log.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: 154
              Relay_Log_Space: 764
              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: 101
                  Master_UUID: 1915a42e-ffa2-11e5-a6ca-00163e000601
             Master_Info_File: mysql.slave_master_info
                    SQL_Delay: 0
          SQL_Remaining_Delay: NULL
      Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates
           Master_Retry_Count: 86400
                  Master_Bind: 
      Last_IO_Error_Timestamp: 
     Last_SQL_Error_Timestamp: 
               Master_SSL_Crl: 
           Master_SSL_Crlpath: 
           Retrieved_Gtid_Set: 
            Executed_Gtid_Set: 
                Auto_Position: 1
         Replicate_Rewrite_DB: 
                 Channel_Name: slave1
           Master_TLS_Version: 
*************************** 2. row ***************************
               Slave_IO_State: 
                  Master_Host: 10.169.214.33
                  Master_User: repl
                  Master_Port: 3307
                Connect_Retry: 60
              Master_Log_File: 
          Read_Master_Log_Pos: 4
               Relay_Log_File: relay-log-slave2.000001
                Relay_Log_Pos: 4
        Relay_Master_Log_File: 
             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: 0
              Relay_Log_Space: 154
              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: NULL
Master_SSL_Verify_Server_Cert: No
                Last_IO_Errno: 2003
                Last_IO_Error: error connecting to master 'repl@10.169.214.33:3307' - retry-time: 60  retries: 4
               Last_SQL_Errno: 0
               Last_SQL_Error: 
  Replicate_Ignore_Server_Ids: 
             Master_Server_Id: 0
                  Master_UUID: 
             Master_Info_File: mysql.slave_master_info
                    SQL_Delay: 0
          SQL_Remaining_Delay: NULL
      Slave_SQL_Running_State: 
           Master_Retry_Count: 86400
                  Master_Bind: 
      Last_IO_Error_Timestamp: 160517 12:38:11
     Last_SQL_Error_Timestamp: 
               Master_SSL_Crl: 
           Master_SSL_Crlpath: 
           Retrieved_Gtid_Set: 
            Executed_Gtid_Set: 
                Auto_Position: 1
         Replicate_Rewrite_DB: 
                 Channel_Name: slave2
           Master_TLS_Version: 
2 rows in set (0.00 sec)

mysql> show slave status for channel 'slave1'G    //显示指定的通道状态
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 10.24.220.70
                  Master_User: repl
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: log.000001
          Read_Master_Log_Pos: 154
               Relay_Log_File: relay-log-slave1.000003
                Relay_Log_Pos: 355
        Relay_Master_Log_File: log.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: 154
              Relay_Log_Space: 764
              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: 101
                  Master_UUID: 1915a42e-ffa2-11e5-a6ca-00163e000601
             Master_Info_File: mysql.slave_master_info
                    SQL_Delay: 0
          SQL_Remaining_Delay: NULL
      Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates
           Master_Retry_Count: 86400
                  Master_Bind: 
      Last_IO_Error_Timestamp: 
     Last_SQL_Error_Timestamp: 
               Master_SSL_Crl: 
           Master_SSL_Crlpath: 
           Retrieved_Gtid_Set: 
            Executed_Gtid_Set: 
                Auto_Position: 1
         Replicate_Rewrite_DB: 
                 Channel_Name: slave1
           Master_TLS_Version: 
1 row in set (0.00 sec)

mysql> stop slave io_thread  for channel 'slave1';        //停止批定通道的IO_THREAD    
Query OK, 0 rows affected (0.00 sec)

mysql> show slave status for channel 'slave1'G
*************************** 1. row ***************************
               Slave_IO_State: 
                  Master_Host: 10.24.220.70
                  Master_User: repl
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: log.000001
          Read_Master_Log_Pos: 154
               Relay_Log_File: relay-log-slave1.000003
                Relay_Log_Pos: 355
        Relay_Master_Log_File: log.000001
             Slave_IO_Running: No
            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: 154
              Relay_Log_Space: 764
              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: 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: 101
                  Master_UUID: 1915a42e-ffa2-11e5-a6ca-00163e000601
             Master_Info_File: mysql.slave_master_info
                    SQL_Delay: 0
          SQL_Remaining_Delay: NULL
      Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates
           Master_Retry_Count: 86400
                  Master_Bind: 
      Last_IO_Error_Timestamp: 
     Last_SQL_Error_Timestamp: 
               Master_SSL_Crl: 
           Master_SSL_Crlpath: 
           Retrieved_Gtid_Set: 
            Executed_Gtid_Set: 
                Auto_Position: 1
         Replicate_Rewrite_DB: 
                 Channel_Name: slave1
           Master_TLS_Version: 
1 row in set (0.00 sec)

 

转自

MySQL 5.7 的多源复制 - wolf - CSDN博客 http://blog.csdn.net/yujin2010good/article/details/50904578

mysql 5.7 多源复制 原创 - zengkefu - 博客园 https://www.cnblogs.com/zengkefu/p/5501130.html

mysql的GTID复制和多源复制 - 李世侠 - 博客园 https://www.cnblogs.com/caibird2005/p/5181101.html

简单讲解MySQL中的多源复制_Mysql_脚本之家 http://www.jb51.net/article/64569.htm

MySQL 5.7多源复制功能的应用 - CSDN博客 http://blog.csdn.net/mj158518/article/details/52311605

一从两主:多源复制

　　

每台mysql 服务器都需要加
my.cnf要加两个参数才可以在GTID多源复制
master-info-repository=TABLE
relay-log-info-repository=TABLE

server1:只接受下面两种数据库，这两种数据来源不同的通道,系统表不复制
replicate_do_db=db1
replicate_do_db=db2

server1 连到 slave1 

mysql> change master to master_host='10.24.220.70',master_user='repl',master_password='123',master_port=3306,master_auto_position=1 for channel 'slave1';

server1 连到 slave2 

mysql> change master to master_host='10.169.214.33',master_user='repl',master_password='123',master_port=3306,master_auto_position=1 for channel 'slave2';

server1:
mysql> start slave;    //两个通道一起起动了
Query OK, 0 rows affected (0.02 sec)

mysql> show processlist;
+----+-------------+-----------+------+---------+------+--------------------------------------------------------+------------------+
| Id | User        | Host      | db   | Command | Time | State                                                  | Info             |
+----+-------------+-----------+------+---------+------+--------------------------------------------------------+------------------+
|  2 | root        | localhost | NULL | Query   |    0 | starting                                               | show processlist |
|  8 | system user |           | NULL | Connect |    3 | Waiting for master to send event                       | NULL             |
|  9 | system user |           | NULL | Connect |    3 | Slave has read all relay log; waiting for more updates | NULL             |
| 10 | system user |           | NULL | Connect |    3 | Connecting to master                                   | NULL             |
| 11 | system user |           | NULL | Connect |    3 | Slave has read all relay log; waiting for more updates | NULL             |
+----+-------------+-----------+------+---------+------+--------------------------------------------------------+------------------+
5 rows in set (0.00 sec)

mysql> start slave;
Query OK, 0 rows affected (0.01 sec)

mysql> show slave statusG

*************************** 1. row ***************************

               Slave_IO_State: Waiting for master to send event

                  Master_Host: 10.24.220.70

                  Master_User: repl

                  Master_Port: 3306

                Connect_Retry: 60

              Master_Log_File: log.000001

          Read_Master_Log_Pos: 714

               Relay_Log_File: relay-log-slave1.000002

                Relay_Log_Pos: 642

        Relay_Master_Log_File: log.000001

             Slave_IO_Running: Yes

            Slave_SQL_Running: Yes

              Replicate_Do_DB: db1,db2

          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: 714

              Relay_Log_Space: 850

              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: 101

                  Master_UUID: 1915a42e-ffa2-11e5-a6ca-00163e000601

             Master_Info_File: mysql.slave_master_info

                    SQL_Delay: 0

          SQL_Remaining_Delay: NULL

      Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates

           Master_Retry_Count: 86400

                  Master_Bind: 

      Last_IO_Error_Timestamp: 

     Last_SQL_Error_Timestamp: 

               Master_SSL_Crl: 

           Master_SSL_Crlpath: 

           Retrieved_Gtid_Set: 1915a42e-ffa2-11e5-a6ca-00163e000601:3

            Executed_Gtid_Set: 1915a42e-ffa2-11e5-a6ca-00163e000601:1-3,

191683db-ffa2-11e5-a424-00163e0007d3:1-3,

191f7a9f-ffa2-11e5-a825-00163e00242a:1

                Auto_Position: 1

         Replicate_Rewrite_DB: 

                 Channel_Name: slave1

           Master_TLS_Version: 

*************************** 2. row ***************************

               Slave_IO_State: Waiting for master to send event

                  Master_Host: 10.169.214.33

                  Master_User: repl

                  Master_Port: 3306

                Connect_Retry: 60

              Master_Log_File: bin.000001

          Read_Master_Log_Pos: 714

               Relay_Log_File: relay-log-slave2.000002

                Relay_Log_Pos: 915

        Relay_Master_Log_File: bin.000001

             Slave_IO_Running: Yes

            Slave_SQL_Running: Yes

              Replicate_Do_DB: db1,db2

          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: 714

              Relay_Log_Space: 1123

              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: 102

                  Master_UUID: 191683db-ffa2-11e5-a424-00163e0007d3

             Master_Info_File: mysql.slave_master_info

                    SQL_Delay: 0

          SQL_Remaining_Delay: NULL

      Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates

           Master_Retry_Count: 86400

                  Master_Bind: 

      Last_IO_Error_Timestamp: 

     Last_SQL_Error_Timestamp: 

               Master_SSL_Crl: 

           Master_SSL_Crlpath: 

           Retrieved_Gtid_Set: 191683db-ffa2-11e5-a424-00163e0007d3:1-3

            Executed_Gtid_Set: 1915a42e-ffa2-11e5-a6ca-00163e000601:1-3,

191683db-ffa2-11e5-a424-00163e0007d3:1-3,

191f7a9f-ffa2-11e5-a825-00163e00242a:1

                Auto_Position: 1

         Replicate_Rewrite_DB: 

                 Channel_Name: slave2

           Master_TLS_Version: 

2 rows in set (0.00 sec)

mysql> stop slave;   //两个通道同时停止
Query OK, 0 rows affected (0.03 sec)

mysql> show slave statusG
*************************** 1. row ***************************
               Slave_IO_State: 
                  Master_Host: 10.24.220.70
                  Master_User: repl
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: log.000001
          Read_Master_Log_Pos: 154
               Relay_Log_File: relay-log-slave1.000002
                Relay_Log_Pos: 355
        Relay_Master_Log_File: log.000001
             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: 154
              Relay_Log_Space: 563
              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: 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: 101
                  Master_UUID: 1915a42e-ffa2-11e5-a6ca-00163e000601
             Master_Info_File: mysql.slave_master_info
                    SQL_Delay: 0
          SQL_Remaining_Delay: NULL
      Slave_SQL_Running_State: 
           Master_Retry_Count: 86400
                  Master_Bind: 
      Last_IO_Error_Timestamp: 
     Last_SQL_Error_Timestamp: 
               Master_SSL_Crl: 
           Master_SSL_Crlpath: 
           Retrieved_Gtid_Set: 
            Executed_Gtid_Set: 
                Auto_Position: 1
         Replicate_Rewrite_DB: 
                 Channel_Name: slave1
           Master_TLS_Version: 
*************************** 2. row ***************************
               Slave_IO_State: 
                  Master_Host: 10.169.214.33
                  Master_User: repl
                  Master_Port: 3307
                Connect_Retry: 60
              Master_Log_File: 
          Read_Master_Log_Pos: 4
               Relay_Log_File: relay-log-slave2.000001
                Relay_Log_Pos: 4
        Relay_Master_Log_File: 
             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: 0
              Relay_Log_Space: 154
              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: NULL
Master_SSL_Verify_Server_Cert: No
                Last_IO_Errno: 2003
                Last_IO_Error: error connecting to master 'repl@10.169.214.33:3307' - retry-time: 60  retries: 4
               Last_SQL_Errno: 0
               Last_SQL_Error: 
  Replicate_Ignore_Server_Ids: 
             Master_Server_Id: 0
                  Master_UUID: 
             Master_Info_File: mysql.slave_master_info
                    SQL_Delay: 0
          SQL_Remaining_Delay: NULL
      Slave_SQL_Running_State: 
           Master_Retry_Count: 86400
                  Master_Bind: 
      Last_IO_Error_Timestamp: 160517 12:38:11
     Last_SQL_Error_Timestamp: 
               Master_SSL_Crl: 
           Master_SSL_Crlpath: 
           Retrieved_Gtid_Set: 
            Executed_Gtid_Set: 
                Auto_Position: 1
         Replicate_Rewrite_DB: 
                 Channel_Name: slave2
           Master_TLS_Version: 
2 rows in set (0.00 sec)

mysql> start slave for channel 'slave1';  // 停止单一通道
Query OK, 0 rows affected (0.00 sec)

mysql> show slave statusG
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 10.24.220.70
                  Master_User: repl
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: log.000001
          Read_Master_Log_Pos: 154
               Relay_Log_File: relay-log-slave1.000003
                Relay_Log_Pos: 355
        Relay_Master_Log_File: log.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: 154
              Relay_Log_Space: 764
              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: 101
                  Master_UUID: 1915a42e-ffa2-11e5-a6ca-00163e000601
             Master_Info_File: mysql.slave_master_info
                    SQL_Delay: 0
          SQL_Remaining_Delay: NULL
      Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates
           Master_Retry_Count: 86400
                  Master_Bind: 
      Last_IO_Error_Timestamp: 
     Last_SQL_Error_Timestamp: 
               Master_SSL_Crl: 
           Master_SSL_Crlpath: 
           Retrieved_Gtid_Set: 
            Executed_Gtid_Set: 
                Auto_Position: 1
         Replicate_Rewrite_DB: 
                 Channel_Name: slave1
           Master_TLS_Version: 
*************************** 2. row ***************************
               Slave_IO_State: 
                  Master_Host: 10.169.214.33
                  Master_User: repl
                  Master_Port: 3307
                Connect_Retry: 60
              Master_Log_File: 
          Read_Master_Log_Pos: 4
               Relay_Log_File: relay-log-slave2.000001
                Relay_Log_Pos: 4
        Relay_Master_Log_File: 
             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: 0
              Relay_Log_Space: 154
              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: NULL
Master_SSL_Verify_Server_Cert: No
                Last_IO_Errno: 2003
                Last_IO_Error: error connecting to master 'repl@10.169.214.33:3307' - retry-time: 60  retries: 4
               Last_SQL_Errno: 0
               Last_SQL_Error: 
  Replicate_Ignore_Server_Ids: 
             Master_Server_Id: 0
                  Master_UUID: 
             Master_Info_File: mysql.slave_master_info
                    SQL_Delay: 0
          SQL_Remaining_Delay: NULL
      Slave_SQL_Running_State: 
           Master_Retry_Count: 86400
                  Master_Bind: 
      Last_IO_Error_Timestamp: 160517 12:38:11
     Last_SQL_Error_Timestamp: 
               Master_SSL_Crl: 
           Master_SSL_Crlpath: 
           Retrieved_Gtid_Set: 
            Executed_Gtid_Set: 
                Auto_Position: 1
         Replicate_Rewrite_DB: 
                 Channel_Name: slave2
           Master_TLS_Version: 
2 rows in set (0.00 sec)

mysql> show slave status for channel 'slave1'G    //显示指定的通道状态
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 10.24.220.70
                  Master_User: repl
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: log.000001
          Read_Master_Log_Pos: 154
               Relay_Log_File: relay-log-slave1.000003
                Relay_Log_Pos: 355
        Relay_Master_Log_File: log.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: 154
              Relay_Log_Space: 764
              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: 101
                  Master_UUID: 1915a42e-ffa2-11e5-a6ca-00163e000601
             Master_Info_File: mysql.slave_master_info
                    SQL_Delay: 0
          SQL_Remaining_Delay: NULL
      Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates
           Master_Retry_Count: 86400
                  Master_Bind: 
      Last_IO_Error_Timestamp: 
     Last_SQL_Error_Timestamp: 
               Master_SSL_Crl: 
           Master_SSL_Crlpath: 
           Retrieved_Gtid_Set: 
            Executed_Gtid_Set: 
                Auto_Position: 1
         Replicate_Rewrite_DB: 
                 Channel_Name: slave1
           Master_TLS_Version: 
1 row in set (0.00 sec)

mysql> stop slave io_thread  for channel 'slave1';        //停止批定通道的IO_THREAD    
Query OK, 0 rows affected (0.00 sec)

mysql> show slave status for channel 'slave1'G
*************************** 1. row ***************************
               Slave_IO_State: 
                  Master_Host: 10.24.220.70
                  Master_User: repl
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: log.000001
          Read_Master_Log_Pos: 154
               Relay_Log_File: relay-log-slave1.000003
                Relay_Log_Pos: 355
        Relay_Master_Log_File: log.000001
             Slave_IO_Running: No
            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: 154
              Relay_Log_Space: 764
              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: 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: 101
                  Master_UUID: 1915a42e-ffa2-11e5-a6ca-00163e000601
             Master_Info_File: mysql.slave_master_info
                    SQL_Delay: 0
          SQL_Remaining_Delay: NULL
      Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates
           Master_Retry_Count: 86400
                  Master_Bind: 
      Last_IO_Error_Timestamp: 
     Last_SQL_Error_Timestamp: 
               Master_SSL_Crl: 
           Master_SSL_Crlpath: 
           Retrieved_Gtid_Set: 
            Executed_Gtid_Set: 
                Auto_Position: 1
         Replicate_Rewrite_DB: 
                 Channel_Name: slave1
           Master_TLS_Version: 
1 row in set (0.00 sec)