Detailed operation steps for MySQL to implement master-slave replication (Windows)

Article directory

1. Teaching video address

Video address: video link

2. Design ideas

Prepare two versions of MySQL 5.7 , one as the master database and the other as the slave database.
Use the master database as the write database and the slave database as the read database.
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3. Specific steps

1. Make a copy of your mysql directory first , and name the copied one mysql-slave.
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2. First modify the my.ini file of the main database, add the following code, mainly to configure the database to be synchronized and shield the database to be synchronized:

log-bin=mysql-bin
server-id	= 1
#设置需要同步的数据库
binlog-do-db=db_user
#屏蔽系统库同步
binlog-ignore-db=mysql
binlog-ignore-db=information_schema
binlog-ignore-db=performance_schema

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3. Then register the master database as a system service.

mysqld install mysql-master --defaults-file="D:\xampp\mysql\bin\my.ini"

4. Then modify the my.ini file of the slave database, modify the startup port and the path of the slave database: insert image description here
add the database table configuration to be synchronized at the same time, remember to modify the server-id, and change it to be inconsistent with the master database:

server-id=2
#设置需要同步的数据库
replicate_wild_do_table=db_user.%
#屏蔽系统库同步
replicate_wild_ignore_table=mysql.%
replicate_wild_ignore_table=information_schema.%
replicate_wild_ignore_table=performance_schema.%

5. After the modification, also register the slave database as a system service.

mysqld install mysql-slave --defaults-file="D:\xampp\mysql-slave\bin\my.ini"

Enter the data directory of the master and slave database directories, modify the auto.cnf file, and change the two uuids to be different. Here, I modified the last digit.
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Then restart the two services of the master and slave databases.

6. Grant master-slave replication permissions to the master library:

GRANT REPLICATION SLAVE ON *.* TO 'root'@'%' IDENTIFIED BY 'root';

Then refresh permissions

FLUSH PRIVILEGES;

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Then check the confirmation position of the main library. Remember the File and Position in the figure below, which will be used later when configuring the slave library:

show master status;

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7. Open the command window of the slave library, and enter the following commands in sequence:
stop synchronization first:

STOP SLAVE;

Then configure the slave library to point to the main library, using the file name File and position recorded in the previous step:

CHANGE MASTER TO MASTER_LOG_FILE='mysql-bin.000002',MASTER_LOG_POS=1178,MASTER_HOST='localhost',MASTER_USER='root',MASTER_PASSWORD='',MASTER_PORT=
3306;

Then enable sync:

START SLAVE;

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Then check the synchronization status of the slave library:

show slave status;

Both Slave_IO_Runing and Slave_SQL_Runing are Yes, indicating that the synchronization is successful. If it is not Yes, please check the error_log.
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PS: If the slave library has been pointed to by the main library before, you need to execute the following command to clear it first:

STOP SLAVE IO_THREAD FOR CHANNEL '';

reset slave all;

8. This completes the configuration of the master-slave replication of the MySQL database. When you modify the data in the table in the db_user database in the master database, the data in the corresponding table in the db_user database in the slave database will also change accordingly.