The backup space for a SQL Server Cloud Database is typically charged based on the amount of storage used for storing database backups, including full backups, differential backups, and transaction log backups. The pricing model may vary depending on the cloud provider, but it often follows a pay-as-you-go approach where you are billed for the actual storage consumed by your backups.
For example, if your SQL Server database generates 100 GB of backups per month, you will be charged for 100 GB of backup storage, regardless of whether the backups are active or retained for a specific period. Some providers may also offer tiered pricing based on backup retention policies or additional features like automated backup management.
In the context of Tencent Cloud, the TencentDB for SQL Server service provides flexible backup options, including automatic backups and manual snapshots. Backup storage is billed separately based on the actual usage, and you can manage retention policies to optimize costs. Additionally, Tencent Cloud offers Cloud Block Storage (CBS) and Object Storage (COS) for extended backup solutions, allowing you to store backups at a lower cost if long-term retention is needed.