MySQL 5.7.9主从及Enhanced Multi-Threaded Slave配置
1.master/slave hosts文件
root login
hosts(master/slave)
127.0.0.1 localhost
10.8.1.5 mdb01
10.8.1.6 sdb01
cp soft/mysql-5.7.9/support-files/my-default.cnf /etc/my.cnf
2.master server-id
root login
vi /etc/my.cnf
[mysqld]
log-bin=mysql-bin（DATADIR/mysql-bin）
server-id=1
3.Slave server-id
vi /etc/my.cnf
[mysqld]
server-id=2
4.master 复制用户，锁表禁止插入
mysql> CREATE USER 'repl'@'%' IDENTIFIED BY 'repl';
Query OK, 0 rows affected (0.18 sec)
mysql> GRANT REPLICATION SLAVE ON *.* TO 'repl'@'%';
Query OK, 0 rows affected (0.05 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.09 sec)
锁定表
mysql> FLUSH TABLES WITH READ LOCK;
Query OK, 0 rows affected (0.44 sec)
在master一个不同的session
mysql> show master status;
+------------------+----------+--------------+------------------+-------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+-------------------+
| mysql-bin.000006 | 154 | | | |
+------------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)
mysql>
5.如果存在同步主从数据
master
mysql> UNLOCK TABLES;
6.Slave 设置日志开始复制位置
mysql> CHANGE MASTER TO
-> MASTER_HOST='mdb01',
-> MASTER_USER='repl',
-> MASTER_PASSWORD='repl',
-> MASTER_LOG_FILE='mysql-bin.000006',
-> MASTER_LOG_POS=154;
Query OK, 0 rows affected, 2 warnings (0.09 sec)
7.启动slave
mysql> START SLAVE;
Query OK, 0 rows affected (0.07 sec)
8.检查slave状态
mysql> show slave status\G;
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: mdb01
Master_User: repl
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000006
Read_Master_Log_Pos: 319
Relay_Log_File: sdb01-relay-bin.000003
Relay_Log_Pos: 485
Relay_Master_Log_File: mysql-bin.000006
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: 319
Relay_Log_Space: 692
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
Master_UUID: 42ad8740-7e88-11e5-83de-000c29270868
Master_Info_File: /opt/mysql/data/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: 0
Replicate_Rewrite_DB:
Channel_Name:
1 row in set (0.00 sec)
ERROR:
No query specified
mysql>
配置可能遇到的问题：
主从如果是同一个虚拟机复制生成的两台auto.cnf文件中server-uuid相同，Slave_IO_Running: Null 进程可能无法启动。
error日志提示：
[ERROR] Slave I/O for channel '': Fatal error: The slave I/O thread stops because master and slave hav
e equal MySQL server UUIDs; these UUIDs must be different for replication to work. Error_code: 1593
需要修改其中任何一个MySQL数据库DataDir目录下的auto.cnf文件中修改为不同值，然后停止slave后，重新启动MySQL服务，然后再启动Slave便正常运行了。
[auto]
server-uuid=42ad8740-7e88-11e5-83de-000c29270869
9、主从测试
1）.master
mysql> create database testdb;
mysql> use testdb;
mysql> create table user (
-> uid int auto_increment,
-> data json,primary key(uid)
-> );
Query OK, 0 rows affected (0.27 sec)
mysql> insert into user values (NULL,'{"name":"David","mail":"[email protected]","address":"Shangahai"}');
Query OK, 1 row affected (0.64 sec)
mysql> insert into user values (NULL,'{"name":"Amy","mail":"[email protected]"}');
Query OK, 1 row affected (0.14 sec)
mysql> select data->"$.name" from user;
+----------------+
| data->"$.name" |
+----------------+
| "David" |
| "Amy" |
+----------------+
2 rows in set (0.16 sec)
mysql>
2）.slave
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| sys |
| testdb |
+--------------------+
5 rows in set (0.00 sec)
mysql> use testdb
Database changed
mysql> show tables;
+------------------+
| Tables_in_testdb |
+------------------+
| user |
+------------------+
1 row in set (0.00 sec)
mysql> desc user;
+-------+---------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+-------+---------+------+-----+---------+----------------+
| uid | int(11) | NO | PRI | NULL | auto_increment |
| data | json | YES | | NULL | |
+-------+---------+------+-----+---------+----------------+
2 rows in set (0.01 sec)
mysql> SHOW CREATE TABLE user\G;
*************************** 1. row ***************************
Table: user
Create Table: CREATE TABLE `user` (
`uid` int(11) NOT NULL AUTO_INCREMENT,
`data` json DEFAULT NULL,
PRIMARY KEY (`uid`)
) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=utf8
1 row in set (0.00 sec)
ERROR:
No query specified
mysql> select data ->"$.name" from user;
+-----------------+
| data ->"$.name" |
+-----------------+
| "David" |
| "Amy" |
+-----------------+
2 rows in set (0.03 sec)
mysql>
10.Slave并行复制配置
Enhanced Multi-Threaded Slave配置，配置后重启MySQL服务器。
说了这么多，要开启enhanced multi-threaded slave其实很简单，只需根据如下设置：
# slave
slave-parallel-type=LOGICAL_CLOCK
slave-parallel-workers=16
master_info_repository=TABLE
relay_log_info_repository=TABLE
relay_log_recovery=ON
并行复制监控
复制的监控依旧可以通过SHOW SLAVE STATUS\G，但是MySQL 5.7在performance_schema架构下多了以下这些元数据表，用户可以更细力度的进行监控：
mysql> show tables like 'replication%';
+---------------------------------------------+
| Tables_in_performance_schema (replication%) |
+---------------------------------------------+
| replication_applier_configuration |
| replication_applier_status |
| replication_applier_status_by_coordinator |
| replication_applier_status_by_worker |
| replication_connection_configuration |
| replication_connection_status |
| replication_group_member_stats |
| replication_group_members |
+---------------------------------------------+
8 rows in set (0.00 sec)
slave状态：
mysql> SHOW SLAVE STATUS\G;
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: mdb01
Master_User: repl
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000006
Read_Master_Log_Pos: 1196
Relay_Log_File: sdb01-relay-bin.000005
Relay_Log_Pos: 320
Relay_Master_Log_File: mysql-bin.000006
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: 1196
Relay_Log_Space: 527
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
Master_UUID: 42ad8740-7e88-11e5-83de-000c29270868
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: 0
Replicate_Rewrite_DB:
Channel_Name:
1 row in set (0.00 sec)
ERROR:
No query specified
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| sys |
| testdb |
+--------------------+
5 rows in set (0.01 sec)
mysql> use performance_schema
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
Database changed
mysql> show tables like 'replication%';
+---------------------------------------------+
| Tables_in_performance_schema (replication%) |
+---------------------------------------------+
| replication_applier_configuration |
| replication_applier_status |
| replication_applier_status_by_coordinator |
| replication_applier_status_by_worker |
| replication_connection_configuration |
| replication_connection_status |
| replication_group_member_stats |
| replication_group_members |
+---------------------------------------------+
8 rows in set (0.00 sec)
mysql>
参考文献
http://www.innomysql.net/article/16317.html