Database Backup (DBS) provides various backup schedule specifications, including micro, small, medium, large, and xlarge. The free quota for data backup, unit price, and backup and restoration performance vary based on backup schedule specifications. Higher specifications offer higher performance at lower unit prices.

Specifications

The following table describes the specifications of backup schedule types.

Backup schedule type Estimated time required to back up 100 GB of data Free quota for data backup (GB per month) Configuration fee for the Chinese mainland Configuration fee for the China (Hong Kong) region and regions outside China
Configuration fee (USD per month) Unit price of excess backup data (USD per GB) Configuration fee (USD per month) Unit price of excess backup data (USD per GB)
micro 20 hours 40 5 0.117 7 0.175
small 5 hours 400 22 0.055 33 0.083
medium 2.5 hours 800 35 0.039 53 0.059
large 1.5 hours 1600 56 0.024 84 0.036
xlarge 1 hour ∞ 140 Free of charge 209 Free of charge
xsmall 1 hour ∞ 8 Free of charge 12 Free of charge

Note
  • You can select the xsmall type only if the data source to be backed up is a file.
  • For specific configuration fees, refer to the billing details that are displayed in the console when you purchased a backup schedule.
  • Higher specifications offer higher backup and restoration performance at lower unit prices. For more information, see Performance tests on backup and restoration.
  • You can only upgrade but cannot downgrade the specifications of a backup schedule. For more information, see Upgrade a backup schedule.
  • Each calendar month, you are allocated a free quota for data backup. If you do not use up the free quota within a month, the remaining free quota does not roll over into the next month.
  • If the total amount of data that you back up during a month exceeds the free quota, the excess data is charged based on the corresponding unit price.

Select backup schedule specifications

You can select backup schedule specifications based on your requirements for the backup and restoration performance and cost efficiency.

  • High performance:

    Database instances, such as databases in the production environment, require high-performance backup schedules to efficiently perform backup and restoration tasks. We recommend that you select the xlarge or large type that provides higher backup and restoration performance.

  • Cost efficiency:
    In scenarios in which high backup and restoration performance is not required, you can focus more on the cost efficiency of backup schedule specifications. To select the most cost-efficient backup schedule specifications, perform the following steps:
    1. Estimate the total amount of your backup data, including full and incremental backup data, in a month.
    2. Calculate the fees for different backup schedule specifications and select the most cost-efficient backup schedule specification. The following formula is used to calculate the backup fees for a subscription backup schedule:
      Backup fees = Configuration fees + (Actual backup data size - Free quota for data backup) × Unit price of the backup schedule type
      Note For more information, see Specifications.
      For example, Company A plans to perform a full backup for a 150 GB database four times each month. The estimated total backup volume in the current month is 600 GB (150 GB × 4). Company A can purchase a backup schedule of one of the following types. The price is applicable in the Chinese mainland.
      • Fees for the micro type: USD 5 + (600 GB - 40 GB) × USD 0.117/GB = USD 70.52
      • Fees for the small type: USD 22 + (600 GB - 400 GB) × USD 0.055/GB = USD 33
      • Fees for the medium type are USD 35. The actual backup data size is less than the free quota. No additional fees are charged.
      In this example, the small type has the lowest price. However, if you require better backup and restoration performance, we recommend that you purchase a type with higher specifications.
      Note The preceding example is for reference only. In practice, you must also consider the growth of full backup data, for example, a 2% increase in the amount of backup data between two consecutive full backups, and the amount of incremental backup data.

      If the total amount of your backup data in a month is greater than 5,207 GB, the xlarge type is the most cost-efficient option. This is because the xlarge type does not have an upper limit on the amount of backup data and offers the best backup performance.