This document introduces the billing details for the backup space of TDSQL-C for MySQL.
Overview
Backup space stores the backup files generated by TDSQL-C for MySQL clusters under the same account (UIN) in a specific region. These backup files consist of data backups and log backups. Backup space usage is aggregated and billed at the account (UIN) + region level. However, the free tier is calculated separately for each cluster and cannot be shared or offset across clusters.
Billing Effective Time and Scope
This billing rule takes effect from 00:00:00 on July 1, 2026, Beijing Time and applies to the backup space billing for TDSQL-C for MySQL provisioned-resource clusters and Serverless clusters.
Billing Scope for Backup Usage
The following four types of backup usage are included in the billing scope:
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Local Region Data Backup | Data backup in the cluster's region, including logical backup and snapshot backup. |
Local Region Log Backup | Log backup in the cluster's region, including binlog and redo log backup. |
Cross-Region Data Backup | Data backup replicated to other regions. |
Cross-Region redo Log Backup | redo log backup replicated to other regions. |
Note:
When backup usage is calculated, only backups whose creation date falls within the backup retention period are counted. Backups that have been automatically cleaned up after exceeding the retention period are not included in the billable usage.
Free Tier Details
The free tier is granted in the following ways, depending on the storage billing mode you purchase:
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Local Region Data Backup | 50% of the prepaid storage capacity purchased for this cluster | 50% of the postpaid storage usage of this cluster |
Local Region Log Backup | 100 GB per cluster | 100 GB per cluster |
Cross-Region Data Backup | No free quota is provided. | No free quota is provided. |
Cross-Region Log Backup | No free quota is provided. | No free quota is provided. |
Billing Usage Calculation Logic
Calculate the value for each cluster according to the following formula, and then sum the results for each account (UIN) + region combination.
Billable usage of local data backups: The billable usage is calculated for each cluster individually using the formula "Local Data Backup Usage − 50% of the cluster's storage free tier". Negative results are rounded up to zero (if the calculation result is less than 0, it is counted as 0), and then the values are summed. The free tier for prepaid and postpaid clusters is calculated independently and cannot be shared or offset across clusters or billing modes.
Billable usage of local log backups: The billable usage is calculated for each cluster individually using the formula "Local Log Backup Usage − 100GB free tier". Negative results are rounded up to zero (if the calculation result is less than 0, it is counted as 0), and then the values are summed.
Billable usage of cross-region data backups: Cross-region data backups do not receive a free tier. All such usage is included in billing.
Billable usage of cross-region log backups: Cross-region log backups do not receive a free tier. All such usage is included in billing.
Pricing
Backup usage that exceeds the free tier is billed on a pay-as-you-go basis and settled hourly according to the following prices:
Note:
The hourly billable usage, payable amount, and free tier are determined based on the system's actual metering results. You can query the hourly billable usage and payable amount under the Billing Center's bill details, and the free tier on the database backup page.
Cross-region data backups and cross-region log backups are billed according to the price of the destination region where the backup files are stored.
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Chinese mainland region (excluding Hong Kong (China)) | 0.00003186 |
Hong Kong (China) and other regions outside China | 0.00003676 |
References