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How to select DBS instances

Last Updated: Dec 05, 2018

DBS is a secure and cost-efficient solution for continuous data protection. The service provides four instance types: micro, small, medium, and large. These instance types offer different performance. This section describes how to choose DBS instances based on your needs.

Backup data is the actual data that has been transmitted over the DBS server. Backup data is different from the file data stored on disks in your database server. The size of backup data is less than file data, and is dependent on factors such as database type, backup method, backup granularity, and the amount of free disk space.

Storage data is the actual data that is stored in the storage system. Storage data is different from backup data and dependent on factors such as storage format of backup data and compression algorithm.

For more information about DBS pricing, see Billing items.

For more information about reducing backup costs, see How to optimize backup plans.

How to choose DBS instances

1. Choose based on backup purposes

  • Independent developers: We recommend that you use the micro instance. This instance type is suitable for backing up databases of small websites and blogs that have less than 20 GB of data. When data loss occurs, you can restore the database to any specified time.
  • Enterprises: We recommend that you use the small instance. This instance type is suitable for backing up databases with around 100 GB of data. You can upgrade the instance to medium or large type based on actual needs.
  • Enterprises with 400 GB or more data files: We recommend that you use the large instance. This instance provides the best performance for full backups, incremental backups, and database recoveries.

2. Choose based on estimated backup data

You can estimate the monthly backup data size and choose the most cost-efficient instance type based on the table below.

Backup data VS instance type

3. Choose based on actual backup data

You can choose the small instance type first and change the instance type based on your actual backup data later.

  • We recommend that independent developers start from the micro instance type and enterprise users use the small instance type at the beginning.
  • To view the actual backup data, you can log on to the DBS console, go to the Backup Plans list.
  • You can then find the most cost-efficient instance type based on the Backup data VS Instance type table.

4. Choose based on backup metrics

You can estimate the monthly backup data size based on metrics such as the database size, TPS, and full backup frequency, and choose the most cost-efficient instance type based on the table below.

Backup metrics VS backup data VS instance type