Database Backup (DBS) provides various backup schedule specifications, including micro, small, medium, large, and xlarge. Higher specifications offer higher performance at lower unit prices.

Fees and performance

Fees for backup schedule specifications

The free quota for data backup, unit price, and backup and restore performance vary based on backup schedule specifications.

The following formula is used to calculate the fees for a backup schedule specification: Fees for purchasing the backup schedule specification + (Actual backup data size - Free quota for data backup) × Unit price of the backup schedule specification.

For more information about backup schedule specifications and their billing standards, see Backup fees.

Performance of backup schedule specifications

  • The following table describes the backup performance of backup schedule specifications.
    Specification Estimated time taken to back up 100 GB of data
    micro 20 hours
    small 5 hours
    medium 2.5 hours
    large 1.5 hours
    xlarge 1 hour
  • For more information about the restoration performance of backup schedule specifications, see Performance tests on backup and restoration.

Select backup schedule specifications

You can select backup schedule specifications based on your requirements for the backup and restore 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 restore tasks. We recommend that you select the xlarge or large type that provides higher backup and restore performance.

  • Cost efficiency:

    In scenarios in which high backup and restore performance is not required, you can focus more on the cost efficiency of backup schedule specifications.

    To select the most cost-efficient backup schedule specification, perform the following step:
    1. Estimate the total amount of 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 fees for a backup schedule specification: Fees for purchasing the backup schedule specification + (Actual backup data size - Free quota for data backup) × Unit price of the backup schedule specification.

      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 a month is 600 GB (150 GB × 4). Company A can purchase a backup schedule of the micro, small, or medium type. The prices are applicable in mainland China.
      • 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 fees for the small type are the lowest.
      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.