The backup and recovery features of PolarDB are free to use, but you are charged for the storage space that the backup files occupy. This topic describes the billing rules for the storage space that is occupied by PolarDB backup files.
Free quota
PolarDB provides a free backup storage quota. If your backup storage usage exceeds this quota, you are charged for the excess usage. For single-region backups, PolarDB charges are based on the storage capacity and storage duration of backup files (data and logs). For cross-region backups, PolarDB charges are based on the same factors, in addition to the network traffic that is generated by the backups.
Backup type | Free quota | |
Data backup | Level-1 backup | Database storage usage × 50% For more information about how to view the database storage usage, see View database storage usage. |
Level-2 backup | None | |
Log backup | 100 GB | |
Pay-as-you-go rules
Billing rules for level-1 backups
If your backup storage usage exceeds the free quota, you are charged for the excess usage based on the amount of storage and the storage duration.
Storage class | The Chinese mainland | China (Hong Kong) and other regions outside the Chinese mainland | Hourly fee calculation method |
PSL5 | USD 0.000464/GB/hour | USD 0.000650/GB/hour | Hourly fee = (Total size of level-1 backups - Free quota) × Price per hour For example, for the PSL5 storage class in the Chinese mainland, if the total size of level-1 backups (snapshots) is 700 GB and the database storage usage is 1,000 GB, the fee per hour is USD 0.0928. Formula: [700 GB - (1,000 GB × 50%)] × USD 0.000464/GB/hour = USD 0.0928/hour Note For more information about how to view the total size of level-1 backups (snapshots), see FAQ. |
PSL4 | USD 0.0003/GB/hour | USD 0.000433/GB/hour |
Billing rules for level-2 backups
Level-2 backups support single-region and cross-region backups. For single-region backups, PolarDB charges for the storage capacity and retention period of backup files (data and logs) on a pay-as-you-go basis. For cross-region backups, PolarDB adds pay-as-you-go charges for the network traffic generated by the backups.
Billing rules for single-region backups
The Chinese mainland
China (Hong Kong) and other regions outside the Chinese mainland
Hourly fee calculation method
USD 0.0000325/GB/hour
USD 0.0000455/GB/hour
Hourly fee = Total size of level-2 backups × Price per hour
For example, if the total size of level-2 backups is 1,000 GB in a Chinese mainland region, the storage fee per hour is USD 0.0325.
Formula: 1000 GB × USD 0.0000325/GB/hour = USD 0.0325
Billing rules for cross-region backups
Billable item
The Chinese mainland
China (Hong Kong) and other regions outside the Chinese mainland
Hourly fee calculation method
Backup storage
USD 0.0000325/GB/hour
USD 0.0000455/GB/hour
Hourly fee = Total size of level-2 backups × Price per hour + Price for cross-region network traffic
For example, for cross-region backups between regions in the Chinese mainland, if the total size of level-2 backups is 1,000 GB and the network traffic consumed by cross-region backup dumps is 500 MB, the hourly fee is USD 0.0691.
The cost is calculated as follows: 1000 GB × 0.0000325 USD/GB/hour + 500 MB / 1024 × 0.075 USD/GB = 0.0691 USD
Network traffic
For more information about the fees for network traffic that is generated by cross-region backups, see Network fees.
NoteCross-region backups are billed on a daily basis. In this topic, the price is converted to an hourly price.
Charges for cross-region backups are displayed in your Data Disaster Recovery bills.
Billing rules for log backups
Log backups support single-region and cross-region backups. For single-region backups, PolarDB charges for the storage capacity of backup files (data and logs) on a pay-as-you-go basis. For cross-region backups, PolarDB also charges for network traffic on a pay-as-you-go basis.
Billing rules for single-region backups
The Chinese mainland
China (Hong Kong) and other regions outside the Chinese mainland
Hourly fee calculation method
USD 0.0000325/GB/hour
USD 0.0000455/GB/hour
Hourly fee = (Total log backup size - 100 GB) × Price per hour
For example, if the total log backup size is 1,000 GB in the Chinese mainland, the hourly fee is USD 0.02925.
Formula: (1000 GB - 100 GB) × 0.0000325 USD/GB/hour = 0.02925 USD
Billing rules for cross-region backups
Billable item
The Chinese mainland
China (Hong Kong) and other regions outside the Chinese mainland
Hourly fee calculation method
Backup storage
USD 0.0000325/GB/hour
USD 0.0000455/GB/hour
Hourly fee = (Total size of log backups - 100 GB) × Price per hour + Price for cross-region network traffic
For example, for cross-region backups between regions in the Chinese mainland, if the total size of log backups is 1,000 GB and the network traffic consumed by the cross-region backup is 500 MB, the hourly fee is USD 0.0659.
Formula: (1,000 GB - 100 GB) × USD 0.0000325/GB/hour + 500 MB/1024 × USD 0.075/GB = USD 0.0659/hour
Network traffic
For more information about the fees for network traffic that is generated by cross-region backups, see Network fees.
NoteCross-region backups are billed on a daily basis. In this topic, the price is converted to an hourly price.
Charges for cross-region backups are displayed in your Data Disaster Recovery bills.