PolarDB:Billing rules for backup storage that exceeds the free quota

Free quota

PolarDB offers a free storage quota for backup files. After this quota is exhausted, for single-region backup on PolarDB, you are charged based on the storage capacity and retention period of backup files (data and logs). For cross-region backup on PolarDB, you are charged based on the storage capacity and retention period of backup files (data and logs) and the network traffic consumed by cross-region backup.

Pay-as-you-go

Billing rules for level-1 backup

After the free quota is exhausted, you are charged for the excess storage space consumed by backup files and the length of time for which the files are retained.

Billing rules for level-2 backup

Level-2 backup can be stored in the same region as the PolarDB cluster or in a different region. For single-region backup on PolarDB, you are charged based on the storage capacity and retention period of backup files (data and logs). For cross-region backup on PolarDB, you are charged based on the storage capacity and retention period of backup files (data and logs) and the network traffic consumed by cross-region backup.

• Billing rules for single-region backup

  Region in the Chinese mainland	Region outside the Chinese mainland	Billing method
  USD 0.0000325 per GB-hour	USD 0.0000455 per GB-hour	Storage fee per hour = Total size of level-2 backup × Unit price per hour For example, a PolarDB for MySQL cluster is deployed in the Chinese mainland. If the total size of level-2 backup is 1,000 GB, the storage fee per hour is USD 0.0325. The fee is calculated based on the following formula: 1,000 GB × USD 0.0000325/GB/hour = USD 0.0325/hour.

• Billing rules for cross-region backup

  Billable item	Regions in the Chinese mainland	Regions outside the Chinese mainland	Billing method
  Backup storage	USD 0.0000325 per GB-hour	USD 0.0000455 per GB-hour	Storage fee per hour = Total size of level-2 backup × Unit price per hour + Network traffic price for cross-region backup For example, assume that you back up data of a PolarDB for MySQL cluster between regions in the Chinese mainland. If the total size of level-2 backup is 1,000 GB and the network traffic consumed by the cross-region backup is 500 MB, the storage fee per hour is USD 0.035. The fee is calculated based on the following formula: 1,000 GB × USD 0.0000325 per GB-hour + 500 MB × USD 0.005 per GB-hour = USD 0.035/hour
  Network traffic	For more information about fees for network traffic consumed by cross-region backup, see Network traffic fees.

  Note

  • Cross-region backup is billed on a daily basis. In this topic, it is converted to the hourly price.

  • Fees for cross-region backup are recorded in DBS bills.

Billing rules for log backup

Log backup can be stored in the same region as the PolarDB cluster or in a different region. For single-region backup on PolarDB, you are charged based on the storage capacity and retention period of backup files (data and logs). For cross-region backup on PolarDB, you are charged based on the storage capacity and retention period of backup files (data and logs) and the network traffic consumed by cross-region backup.

• Billing rules for single-region backup

  Regions in the Chinese mainland	Regions outside the Chinese mainland	Billing method
  USD 0.0000325 per GB-hour	USD 0.0000455 per GB-hour	Storage fee per hour = (Total physical storage of log backup - 100 GB) × Unit price per hour For example, if the total size of log backups is 1,000 GB, the storage fee per hour is USD 0.02925. The fee is calculated based on the following formula: (1,000 GB - 100 GB) × USD 0.0000325/GB/hour = USD 0.02925/hour.

• Billing rules for cross-region backup

  Billable item	Regions in the Chinese mainland	Regions outside the Chinese mainland	Billing method
  Backup storage	USD 0.0000325 per GB-hour	USD 0.0000455 per GB-hour	Storage fee per hour = (Total physical storage of log backup - 100 GB) × Unit price per hour + Network traffic price for cross-region backup For example, a PolarDB for MySQL cluster is deployed in the Chinese mainland. If the total size of log backup is 1,000 GB and the network traffic consumed by cross-region backup is 500 MB, the storage fee per hour is USD 0.03175. The fee is calculated based on the following formula: (1,000 GB - 100 GB) × USD 0.0000325/GB/hour + 500 MB × USD 0.005 per GB-hour = USD 0.03175/hour
  Network traffic	For more information about fees for network traffic consumed by cross-region backup, see Network traffic fees.

  Note

  • Cross-region backup is billed on a daily basis. In this document, it is converted to the hourly price.

  • Fees for cross-region backup are recorded in DBS bills.

Use storage plans to offset level-1 backup storage fees

A storage plan can be used to offset the storage space exceeding the free quota for level-1 backups. If the capacity of the storage plan is insufficient to offset the level-1 backup storage space, you are charged for additional storage space on a pay-as-you-go basis.

The following table lists the ratios.

For example, you purchase a storage plan with a capacity of 100 GB and 50 GB is left after you offset the storage space (PSL5). Your cluster uses 50 GB of storage for level-1 backups (outside the free quota) in a Chinese mainland region. In this case, the storage plan automatically uses 31.25 GB (50/1.6=31.25) to offset the backup storage. As a result, 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 backups, you are charged for the excess storage usage on a pay-as-you-go basis.

Use storage plans to offset level-2 backup storage fees

A storage plan can be used to offset the storage space for level-2 backups. If the capacity of the storage plan is insufficient to offset the level-2 backup storage space, you are charged for additional storage space on a pay-as-you-go basis.

The following table lists the ratios.

For example, you purchase a storage plan with a capacity of 100 GB, and 50 GB is left after it offsets the data storage usage. Your cluster uses 50 GB of storage for level-2 backups in a Chinese mainland region. In this case, the storage plan automatically uses 2.15 GB (50/23.26) to offset the backup storage usage and 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 backups, you are charged for the excess storage usage on a pay-as-you-go basis.

Use storage plans to offset log backup storage fees

A storage plan can be used to offset the storage space for log backups. If the capacity of the storage plan is insufficient to offset the log backup storage space, you are charged for additional storage space on a pay-as-you-go basis.

The following table lists the ratios.

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

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