This article mainly introduces the principles of MySQL database backup and restoration, so that you can better understand the ApsaraDB for RDS backup and restoration mechanisms. ApsaraDB for RDS uses mysqldump to logically back up data to the MySQL database. Xtrabackup can be used for a full physical backup at the instance level.
Mysqldump is a powerful and important MySQL backup tool that that performs logical backups. It is worthwhile to fully familiarize yourself with the various backup parameters and restoration policies of mysqldump.
Back up a single database or a specified table in a single database:
mysqldump [OPTIONS] database [tb1] [tb2]…
Back up multiple databases:
mysqldump [OPTIONS] –databases [OPTIONS] DB1 [DB2 DB3...]
Back up all databases:
mysqldump [OPTIONS] –all-databases [OPTIONS]
Xtrabackup is a MySQL database backup tool provided by Percona. According to the official introduction, "Percona XtraBackup is the world's only open-source, free MySQL hot backup software that performs non-blocking backups for InnoDB and XtraDB databases." Xtrabackup can be used to perform incremental or full physical backups for MySQL databases.
Full backup:
innobackupex –user=root -p /home/backup/
Files after the backup:
During the backup, a directory named according to the current data and time will be created under the backup directory to store the backup files.
For details, you can go to this tutorial.
Using binary log files and positions to synchronize RDS data to a local database may easily be interrupted. This is because the positions of the RDS binary logs to which the local database points change (binary log positions differ between the master and slave nodes) when a failover, restart, or inter-node migration occurs on RDS. But the RDS 5.6 version employs the new synchronization method, i.e., GTID which can help to synchronize data between ECS and RDS without interruption whenever a failover, reboot, or migration occurs.
In this article, you will get some information on how to synchronize the data from ApsaraDB RDS for MySQL to a local user-defined database.
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Raja_KT May 27, 2019 at 3:26 pm
Good one . But if you can refer in the context of using Apasara RDS, thrwing more light?