Overview
No system is immune to failures, and some failures may lead to catastrophic damage to the database. TencentDB for Redis® backend service periodically backs up instance data on a scheduled basis, supports immediate backups at any time, and persistently stores the generated RDB backup files in Tencent Cloud COS service. TencentDB for Redis® backend service supports rapid cloning of a brand-new instance based on the source instance if error occurs to database data, ensuring database reliability.
Automatic backup
By default, the service backs up data between 02:00 AM and 08:00 AM every day. In order to avoid increasing the processing burden on the master database, the backup data comes from replica nodes. You can flexibly configure the start time period of automatic backup tasks based on your conditions. You can view the daily backup data in Backup and Restoration in the TencentDB for Redis® console. For details, see Backing up Data.
Manual backup
In addition to regular automatic backup performed by the system backend, manual backup is also supported. You can manually back up your instance in the TencentDB for Redis® console whenever you want. For details, see Backing up Data.
Backup File
The backup list displays all the backup files of the instance and their information. TencentDB for Redis® provides two different addresses for downloading backup data from public network and private network, separately. You can choose the download method based on your requirements. For details, see Configuring Backup File Download Methods.
Download from public network: You can download backup data anywhere you can access the Internet. The public network download is enabled by default, and you can disable it as needed.
Download from private network: In order to prevent backup data from being dragged, TencentDB for Redis® allows you to download backup files from specified servers on the allowed private network. You must download backup files from the region where the Redis instance resides but cannot download backup files across regions.
Restore data
Only TencentDB for Redis® 2.8 supports instance restoration based on backup files of the source instance, and the restoration process affects services. For details, see Restoring Data.
Clone Instance
TencentDB for Redis® Memory Edition (excluding v2.8) supports instance clone, that is, creating a brand-new instance based on a backup file. The data of the new instance is the same as that in the backup file. This allows you to analyze history data. You can also roll back an instance by swapping the IPs of the new instance and the original instance. For details, Clone Instance.