Billing rules for backup storage that exceeds the free quota

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.

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.

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
  CNY 0.00021/GB/hour	CNY 0.000294/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 CNY 0.21. Formula: 1,000 GB × CNY 0.00021/GB/hour = CNY 0.21/hour

• 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	CNY 0.00021/GB/hour	CNY 0.000294/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 CNY 0.4541. Formula: 1,000 GB × CNY 0.00021/GB/hour + 500 MB/1024 × CNY 0.5/GB = CNY 0.4541/hour
  Network traffic	For more information about the fees for network traffic that is generated by cross-region backups, see Network fees.

  Note

  • Cross-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
  CNY 0.00021/GB/hour	CNY 0.000294/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 CNY 0.189. Formula: (1,000 GB - 100 GB) × CNY 0.00021/GB/hour = CNY 0.189/hour

• 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	CNY 0.00021/GB/hour	CNY 0.000294/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 CNY 0.4331. Formula: (1,000 GB - 100 GB) × CNY 0.00021/GB/hour + 500 MB / 1024 × CNY 0.5/GB = CNY 0.4331/hour
  Network traffic	For more information about the fees for network traffic that is generated by cross-region backups, see Network fees.

  Note

  • Cross-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.

Use storage plans to offset level-1 backup costs

You can use storage plans to offset the costs of level-1 backup storage that exceeds the free quota. If the capacity of a storage plan is insufficient to offset the level-1 backup storage usage, you are charged for the excess storage usage on a pay-as-you-go basis.

The deduction rules are as follows:

For example, you purchase a storage plan with a capacity of 100 GB. After the storage plan is used to offset the storage usage of PSL5, 50 GB of the storage plan capacity remains. Your cluster in the Chinese mainland uses 50 GB of level-1 backup storage that exceeds the free quota. In this case, the storage plan automatically uses 31.25 GB (50 / 1.6 = 31.25) of its capacity to offset this backup storage usage. The storage plan has 18.75 GB of capacity remaining.

If the remaining capacity of the storage plan is insufficient to offset the level-1 backup storage usage, you are charged for the excess storage usage on a pay-as-you-go basis.

Use storage plans to offset level-2 backup costs

You can use storage plans to offset the costs of level-2 backup storage. If the capacity of a storage plan is insufficient to offset the level-2 backup storage usage, you are charged for the excess storage usage on a pay-as-you-go basis.

The deduction rules are as follows:

For example, you purchase a storage plan with a capacity of 100 GB, and 50 GB remains after it is used to offset the data storage usage. Your cluster in the Chinese mainland uses 50 GB of level-2 backup storage. In this case, the storage plan automatically uses 2.15 GB (50 / 23.26) of its capacity to offset this backup storage usage. The storage plan has 47.85 GB of capacity remaining.

If the remaining capacity of the storage plan is insufficient to offset the level-2 backup storage usage, you are charged for the excess storage usage on a pay-as-you-go basis.

Use storage plans to offset log backup costs

You can use storage plans to offset the costs of log backup storage. If the capacity of a storage plan is insufficient to offset the log backup storage usage, you are charged for the excess storage usage on a pay-as-you-go basis.

The following deduction rules apply:

For example, you purchase a storage plan with a capacity of 100 GB, and 50 GB remains after it is used to offset the data storage usage. Your cluster in the Chinese mainland uses 50 GB of log backup storage. In this case, the storage plan automatically uses 2.15 GB (50 / 23.26) of its capacity to offset this backup storage usage. The storage plan has 47.85 GB of capacity remaining.

If the remaining capacity of the storage plan is insufficient to offset the log backup storage usage, you are charged for the excess storage usage on a pay-as-you-go basis.