PolarDB: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 the free quota, you are charged for the excess. Charges for single-region backups on PolarDB are based on the storage capacity and retention period of backup files (data and logs). Charges for cross-region backups on PolarDB are based on the storage capacity and retention period of backup files (data and logs), and the network traffic generated by the cross-region 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 on a pay-as-you-go basis. The fee is based on the storage usage and duration.

Billing Rules For Level-2 Backups

Level-2 backups support single-region and cross-region backups. For single-region backups, PolarDB charges you based on the storage capacity and retention period of backup files (data and logs). For cross-region backups, PolarDB also charges you for the generated network traffic.

• Billing Rules For Single-region Backups

  The Chinese mainland	China (Hong Kong) and other regions	Hourly fee calculation method
  USD 0.0000325 per GB-hour	USD 0.0000455 per GB-hour	Hourly fee = Total size of level-2 backups × Price per hour For example, for the price in the Chinese mainland, if the total size of level-2 backups is 1,000 GB, the hourly fee is USD 0.0325. Formula: 1,000 GB × USD 0.0000325/GB-hour = USD 0.0325/hour

• Billing Rules For Cross-region Backups

  Billable item	The Chinese mainland	China (Hong Kong) and other regions	Hourly fee calculation method
  Backup storage	USD 0.0000325 per GB-hour	USD 0.0000455 per GB-hour	Hourly fee = Total size of level-2 backups × Price per hour + Price of cross-region network traffic Take the price for cross-region backup between regions in the Chinese mainland as an example: If the total size of level-2 backups is 1,000 GB and the network traffic consumed by the cross-region backup dump is 500 MB, the hourly fee is USD 0.0691. Formula: 1,000 GB × USD 0.0000325/GB-hour + 500 MB / 1024 × USD 0.075/GB = USD 0.0691/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 rate.

  • Cross-region backup usage is measured and displayed on the bills for Data Disaster Recovery.

Billing Rules For Log Backups

You can store log backups as single-region backups or cross-region backups. For single-region backups, PolarDB charges you based on the storage capacity and retention period of backup files (data and logs). For cross-region backups, PolarDB also charges you for the generated network traffic.

• Billing Rules For Single-region Backups

  The Chinese mainland	China (Hong Kong) and other regions	Hourly fee calculation method
  USD 0.0000325 per GB-hour	USD 0.0000455 per GB-hour	Hourly fee = (Total size of log backups - 100 GB) × Price per hour For example, for the price in the Chinese mainland, if the total size of log backups is 1,000 GB, the hourly fee is USD 0.02925. Formula: (1,000 GB - 100 GB) × USD 0.0000325/GB-hour = USD 0.02925/hour

• Billing Rules For Cross-region Backups

  Billable item	The Chinese mainland	China (Hong Kong) and other regions	Hourly fee calculation method
  Backup storage	USD 0.0000325 per GB-hour	USD 0.0000455 per GB-hour	Hourly fee = (Total size of log backups - 100 GB) × Price per hour + Price of cross-region network traffic Take the price for cross-region backup between regions in the Chinese mainland as an example: If the total size of log backups is 1,000 GB and the network traffic consumed by the cross-region backup dump 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.

  Note

  • Cross-region backups are billed on a daily basis. In this topic, the price is converted to an hourly rate.

  • Cross-region backup usage is measured and displayed on the bills for Data Disaster Recovery.

Use storage plans to offset level-1 backup fees

You can use storage plans to offset the fees for level-1 backup usage that exceeds the free quota. If the capacity of a storage plan is insufficient to offset the level-1 backup storage usage, the excess usage is billed 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 usage of PSL5 storage space is deducted, 50 GB of the storage plan capacity remains. The cluster uses 50 GB of level-1 backup storage that exceeds the free quota in a region in the Chinese mainland. In this case, the storage plan automatically uses 31.25 GB (50 / 1.6 = 31.25) of its capacity to offset the fees for this backup storage usage. The storage plan has 18.75 GB of capacity left.

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

Use storage plans to offset level-2 backup fees

You can use storage plans to offset the fees for level-2 backups. If the capacity of a storage plan is insufficient to offset the level-2 backup storage usage, the excess usage is billed 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 other storage space usage is deducted, 50 GB of the storage plan capacity remains. Your cluster uses 50 GB of level-2 backup storage in a region in the Chinese mainland. In this case, the storage plan automatically uses 2.15 GB (50 / 23.26) of its capacity to offset the fees for this backup storage usage. The storage plan has 47.85 GB of capacity left.

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

Use storage plans to offset log backup fees

You can use storage plans to offset the fees for log backups. If the capacity of a storage plan is insufficient to offset the log backup storage usage, the excess usage is billed 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 other storage space usage is deducted, 50 GB of the storage plan capacity remains. Your cluster uses 50 GB of log backup storage in a region in the Chinese mainland. In this case, the storage plan automatically uses 2.15 GB (50 / 23.26) of its capacity to offset the fees for this backup storage usage. The storage plan has 47.85 GB of capacity left.

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