This topic describes the backup storage pricing of an ApsaraDB RDS for MySQL instance.

Backup storage fee

A free quota on storage is provided for each RDS instance to store backup files. If the total size of the backup files of your RDS instance does not exceed the free quota, no fees are charged. For more information, see View and manage the size of backup files for an ApsaraDB RDS for MySQL instance. If the total size exceeds the free quota, you are charged an hourly fee for the excess backup storage that you use. The hourly fee is calculated by using the following formula: Hourly fee for backup storage = (Total size of backup files - Free quota) × Unit price of storage.

Total size of backup files

The total size of backup files is calculated by using the following formula: Total size of backup files = Size of data backup files + Size of log backup files.

Note You can log on to the ApsaraDB RDS console and go to the Basic Information page of your RDS instance. Then, you can view the total size of backup files in the lower-right corner of the page.
Free quota
Storage type Free quota Description
Standard SSD or ESSD The free quota is equal to 200% of the storage capacity that you purchase for your RDS instance. You can log on to the ApsaraDB RDS console and go to the Basic Information page of your RDS instance. Then, you can view the total size of backup files in the lower-right corner of the page.
Local SSD The free quota is equal to 50% of the storage capacity that you purchase for your RDS instance.
Unit price
Storage type Unit price for backup files that are stored for up to 730 days (USD per GB per hour) Unit price for archived backup files that are stored for more than 730 days (USD per GB per hour)
Standard SSD or ESSD 0.00004 The unit price varies in different regions:
  • Japan (Tokyo), India (Mumbai), Singapore (Singapore), Australia (Sydney), Indonesia (Jakarta), and Philippines (Manila): 0.000034
  • China (Hong Kong): 0.000031
  • UAE (Dubai): 0.000028
  • Germany (Frankfurt), UK (London), US (Silicon Valley), and US (Virginia): 0.000022
  • Other regions: 0.000025
Local SSD 0.00020

Usage notes

  • The backup storage fee varies based on the total size of backup files. Backup files do not consume the storage capacity of your RDS instance. Therefore, the backup storage fee is not affected by the storage usage.
  • When you analyze the backup storage fee, you must check the total size of backup files. You do not need to check the storage usage.

Methods to reduce the backup storage fee

FAQ

  • Why am I charged for backup storage even if the total size of the backup files of my RDS instance does not exceed the free quota for backup storage?

    You are charged for backup storage because the size of the backup files exceeded the free quota in the past.

  • Why is the size of backup files larger than the amount of data on my RDS instance?

    The size of backup files may not equal the amount of data on your RDS instance.

    If your RDS instance uses standard or enhanced SSDs, ApsaraDB RDS takes snapshots to back up your RDS instance. The size of a snapshot backup file may be significantly larger than the amount of data. Therefore, the free quota for backup storage that is allocated to an RDS instance that uses standard or enhanced SSDs is four times the free quota for backup storage that is allocated to an RDS instance that uses local SSDs. For more information, see Backup storage pricing for an ApsaraDB RDS for MySQL instance.
    Note When ApsaraDB RDS calculates the size of a snapshot backup file, it counts in all the non-empty blocks to which data is written. If the write operations are scattered among blocks, none of the blocks is empty. For example, if 3 MB of data is written across two, three, or four blocks, none of these blocks is empty. In this case, ApsaraDB RDS counts in all these blocks to calculate the total size. As a result, the size of the snapshot backup file is larger than the actual amount of data.
  • The backup retention period of my RDS instance is shortened from x days to y days. Why does the size of backup files remain unchanged?

    If no backup files are retained for more than y days, after you shorten the backup retention period, no backup files are deleted. The size of backup files remains unchanged.