The backup space is used to store the backups of all TencentDB for MySQL instances in a region. These backups can be automatic, manual, and log backups.
TencentDB for MySQL offers a certain amount of backup capacity for free based on the region. The capacity is equivalent to the sum of the storage capacity of all two-node and three-node instances (including source and disaster recovery instances) in the region. For calculation examples, see Calculation Formula.
- Free backup space is provided when purchasing a source or disaster recovery instance but will not be available in case of a read-only instance.
- The backup capacity can be viewed on the database backup page in the TencentDB for MySQL console.
Usage of backup capacity that exceeds the free tier will be charged at 0.000127 USD/GB/hour in the Chinese mainland. For prices for regions outside of the Chinese mainland, see TencentDB for MySQL Price Calculator.
If the excessive backup capacity is less than 1 GB, no fees will be charged. If the time period is less than 1 hour, it will be calculated as 1 hour. TencentDB for MySQL adopts a flexible giveaway policy, so that you generally do not need to pay for the backup capacity for most instances.
Free backup capacity in one region = Sum of storage capacity of all TencentDB for MySQL two-node and three-node instances in that region
Paid backup capacity in one region = Data backup volume + log backup volume - free backup capacity (all values are for that region)
Backups of TencentDB for MySQL instances in the recycle bin will also be counted into the total backup capacity.
If you have a running a TencentDB for MySQL two-node instance with a purchased database storage capacity of 500 GB/month in Guangzhou Zone 3 and another such instance with a purchased database storage capacity of 200 GB/month in Guangzhou Zone 4, you will get a free backup capacity of 700 GB/month in the Guangzhou region.
Usage of backup capacity that exceeds the free tier are calculated on an hourly basis according to the following rule. For example, if your data backups reach 800 GB and log backups reach 100 GB, your total backup capacity usage in Guangzhou will exceed 700 GB, and your hourly billable backup capacity will be 200 GB (800 + 100 - 700 = 200).
After the account falls into arrears, the backup will change with the lifecycle of the instance. For more information, see backup lifecycle of pay-as-you-go instances as described above.
The values listed in the table below are the maximum values supported in the same region under a single Tencent Cloud account.
|Improvement||Before Upgrade||After Upgrade|
|Data backup retention period||30 days||1,830 days|
|Log backup retention period||5 days||1,830 days|
|Backup compression rate||General||Ultra-High|
|binlog centralization||Local storage||Centralized storage|
The rollback feature relies on the backup cycle and retention days of data backups and log backups (binlog). Rollback will be affected if you reduce the automatic backup frequency and retention period. Please select the parameters as needed.
|Business Scenario||Recommended Backup Retention Period|
|Core businesses||7-1,830 days|
|Non-core and non-data businesses||7 days|
|Archive businesses||7 days. We recommend that you manually back up data based on your business needs and delete the backups promptly after use|
|Testing businesses||7 days. We recommend that you manually back up data based on your actual business needs and delete the backups promptly after use|