This topic describes the pricing rules of the backup and restoration features of PolarDB.

The backup and restoration features of PolarDB are provided free of charge. However, backup files consume storage space, which is paid services.

PolarDB provides a free quota of storage for level -1 backups and log backups respectively. If your usage exceeds the quotas, you are charged for the excess storage space that is used by the backups based on the storage duration.

Level-2 backups are paid services. You are charged for the storage space that is used by the backups based on the storage duration.

Table 1. Prices (Unit: USD/GB/hour)
Region Level-1 backups Level-2 backups Log backups
Regions in mainland China 0.000464 0.0000325 0.0000325
Regions outside mainland China 0.000650 0.0000455 0.0000455
Note You are charged for the storage space that exceeds the free quota based on the pay-as-you-go billing method. To reduce costs, we recommend that you purchase a storage plan for level-1 backups. For more information, see Billing rules of data backups that exceed the free quota.

If you modify data after the snapshots of your cluster are created, the amount of snapshot backups increases. In this case, you are charged for the additional backups. If data is modified during defragmentation, the amount of snapshot backups also increases.

For example, assume your database has 100 GB of data,
  • If you modify 10 GB of the data after a snapshot is created, you are charged for 100 GB of data storage and 10 GB of snapshot storage.
  • If you choose to retain the snapshots when you delete your database, you are charged for 100 GB of snapshot storage.

Reduce the charges for backup storage usage

You can use one of the following methods to reduce your costs:
  • Shorten the retention time of level-1 backups.
  • Submit a ticket to disable the level-1 backup feature.
    Notice However, lost data may not be restored when you disable the level-1 backup feature. In this case, we recommend that you do not disable this feature.