How to restore MySQL database

MySQL database recovery methods include physical backup recovery, logical backup recovery, binary log recovery, and database replication recovery. Detailed introduction: 1. Physical backup and recovery. Physical backup refers to backing up the entire database file system to another location. The steps are to first stop the MySQL service, copy the backup file back to the correct location of the database server, then start the MySQL service and finally check the database. Whether it is restored to normal; 2. Logical backup recovery. Logical backup refers to exporting the data in the database into SQL statements and so on.

MySQL is a popular relational database management system that provides multiple methods to restore a database, depending on your backup strategy and the state of the database. The following are some common MySQL database recovery methods:

1. Use physical backup to restore: Physical backup refers to backing up the file system of the entire database to another location. If you have a recent physical backup, you can restore it using the following steps:

- Stop the MySQL service.

- Copy the backup file back to the correct location on the database server.

- Start the MySQL service.

- Check whether the database is back to normal.

2. Use logical backup to restore: Logical backup refers to exporting the data in the database into SQL statements so that it can be re-imported when needed. If you have a recent logical backup, you can restore using the following steps:

- Create a new, empty database.

- Use the SQL statements in the backup file to import the data into the new database.

- Check whether the database is back to normal.

3. Use binary log recovery: MySQL's binary log is a file that records database changes. If you have binary logging enabled and have a full binary log backup, you can use the following steps to recover:

- Stop the MySQL service.

- Copy the backed up binary log files to the correct location.

- Start the MySQL service.

- Use MySQL's binlog tool to apply binary logs to the database.

- Check whether the database is back to normal.

4. Recovery using database replication: If you use MySQL's replication feature and have an available replication instance, you can use the following steps to recover:

- Stop writes to the primary database Enter operation.

- Promote the replication instance to the primary database.

- Connect additional replication instances to the new primary database.

- Check whether the database is back to normal.

No matter which recovery method you choose, you should ensure that you take a proper backup before performing recovery operations. In addition, depending on your specific situation, you may need to refer to MySQL's official documentation or seek help from a professional database administrator.

In summary, MySQL database recovery methods include physical backup recovery, logical backup recovery, binary log recovery and database copy recovery, etc. Choosing the appropriate recovery method depends on your backup strategy and the state of your database. Whichever method you use, you should proceed with caution and make sure you take appropriate backups before performing recovery operations.

The above is the detailed content of How to restore MySQL database. For more information, please follow other related articles on the PHP Chinese website!