Data Disaster Recovery backs up and restores databases to cloud storage. Two storage targets are available: built-in storage and Object Storage Service (OSS).
Choose a storage target
| Dimension | Built-in storage | OSS |
|---|---|---|
| Security | Backup sets are not directly accessible. Access is governed by Resource Access Management (RAM). | Backup sets are directly accessible. You are responsible for managing access controls and securing the data. |
| Reliability | Built on Apsara Distributed File System for high-reliability distributed storage. | Built on Apsara Distributed File System for high-reliability distributed storage. |
| Cost | No OSS API charges. Pay only for the storage you consume (pay-as-you-go), or reduce costs with a subscription-based storage plan. | OSS API calls are billed. For pricing details, see Billing overview. |
| Ease of use | No bucket configuration required. Storage scales automatically. | You manage bucket names and storage limits. |
| Value-added services | Supports automatic download of CSV-formatted backup sets. You manage the backup lifecycle. | Backup sets stored in OSS are directly accessible. You manage the backup lifecycle. |
When to use built-in storage: Choose built-in storage when you want minimal management overhead and strong data isolation. It is the simpler option for most workloads.
When to use OSS: Choose OSS when you need direct access to backup sets.
Built-in storage
Built-in storage requires no manual capacity configuration. Storage scales automatically based on the amount of data backed up, and you pay only for what you use.
For large backup volumes, subscription-based storage plans are more cost-effective than pay-as-you-go billing. Larger plans come with higher discounts. For plan details and pricing, see the Subscription-based storage plans section of the Storage fees topic.