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    ApsaraDB RDS:View the free quota for backup storage

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    ApsaraDB RDS:View the free quota for backup storage

    Last Updated:Oct 25, 2023

    This topic describes how to view the free quota for backup storage of an ApsaraDB RDS for MariaDB instance and how to calculate the amount of excess backup storage that you use. The free quota varies based on the instance configuration.

    Background information

    Backup files occupy backup storage. Each RDS instance is allocated with a free quota for backup storage. If the total size of backup files exceeds the free quota, additional fees are incurred.

    Formula

    RDS instances that are equipped with cloud disks support only snapshot backups. The free quota that is provided to store snapshot backup files is calculated by using the following formula: Free quota = 200% × Purchased storage capacity. Unit: GB. The calculation result is rounded only up to the next integer.

    The amount of excess backup storage for which you must pay an hourly rate is calculated by using the following formula: Excess backup storage = Size of data backup files + Size of log backup files - Free quota.

    If the size of data backup files is 150 GB, the size of log backup files is 50 GB, and the storage capacity purchased during instance creation is 60 GB, then the excess backup storage usage for which you must pay an hourly rate is 80 GB based on the following calculation: Excess backup storage usage = 150 + 50 - 200% × 60 = 80 (GB).

    Note

    • For more information about the hourly rate for excess backup storage, see the pricing information at ApsaraDB for RDS.

    • When you use RDS Basic Edition, some database engines support a seven-day retention period during which you can retain backup files free of charge. For more information, visit the ApsaraDB RDS console.

    View the free quota on backup storage of an RDS instance in the ApsaraDB RDS console

    1. Go to the Instances page. In the top navigation bar, select the region in which the RDS instance resides. Then, find the RDS instance and click the ID of the instance.

    2. In the Usage Statistics section of the page, view the free quota for backup storage to the right of Backup Size.

      Note

      The free quota on backup storage varies based on the instance configuration.

    FAQ

    • Will backup files occupy the storage that I purchased during instance creation?

      No, backup files do not occupy the storage that you purchased during instance creation.

    • Can I purchase subscription-billed backup storage?

      No, you cannot purchase backup storage.