What is mysql incremental backup

MySQL incremental backup is a backup strategy that is used to back up only changed data and logs to reduce backup time and storage space consumption. There are two common MySQL incremental backup methods: 1. Binary log backup, the server will record all modification operations to the database, and store these operations in the form of binary logs; 2. Backup based on transaction log, the transaction log includes operations such as insertion, update, and deletion of database tables. Incremental backups can be achieved by backing up transaction logs and replaying those operations.

Operating system for this tutorial: Windows 10 system, MySQL 8 version, Dell G3 computer.

MySQL incremental backup is a backup strategy used to back up only changed data and logs to reduce backup time and storage space consumption.

In the MySQL incremental backup, a full backup (Full Backup) is first performed to back up all data and logs of the database to an initial state snapshot. Then, after each backup, only the data and logs that have changed since the last backup are backed up.

There are two common MySQL incremental backup methods:

1. Binary Log Backup: MySQL server will record all modification operations to the database, and Store these operations in the form of a binary log. For incremental backup, these binary log files can be backed up regularly and applied to the latest full backup to restore the database to the latest state.

2. Backup based on transaction log (InnoDB Transaction Log Backup): For MySQL databases using the InnoDB storage engine, the transaction log (Transaction Log) can be backed up. The transaction log contains operations such as insertion, update, and deletion of database tables. Incremental backup can be achieved by backing up the transaction log and replaying these operations.

Using incremental backup can effectively reduce the time and storage space required for backup, especially in large databases or highly active databases, when there are only a few changes every day, incremental backups Volume backup is more efficient and economical than full backup. However, it should be noted that when restoring data, you need to rely on a combination of full backup and incremental backup to restore the database to a specific point in time.

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