Built-in storage and OSS - Data Management - Alibaba Cloud Documentation Center

Data Disaster Recovery allows you to back up and restore databases. You can restore backup data to cloud storage, including built-in storage and Object Storage Service (OSS).

Item	Built-in storage	OSS
Security	You cannot directly access backup sets in built-in storage. Data Disaster Recovery is integrated with Resource Access Management (RAM).	You can directly access backup sets in OSS. To ensure security, you must manually manage backup sets.
Reliability	Data Disaster Recovery uses Apsara Distributed File System to provide a distributed storage service with high reliability.	Data Disaster Recovery uses Apsara Distributed File System to provide a distributed storage service with high reliability.
Cost-effectiveness	You do not have to pay to call OSS API operations. You pay for only the amount of data that is backed up on a pay-as-you-go basis.	You must pay to call OSS API operations. For more information, see Billing overview.
Ease of use	You do not need to manage OSS buckets.	You must manage the names and upper limit of OSS buckets.
Value-added services	You must manage the lifecycle of backup sets. You can enable automatic download of CSV-formatted backup sets.	You must manage the lifecycle of backup sets.

Built-in storage description

You do not need to manually configure storage space for Data Disaster Recovery. Storage space is automatically scaled based on the amount of stored data. You need only to pay for the amount of storage space that is actually consumed. We recommend that you use Data Disaster Recovery storage plans if you require huge data volume. Compared with the pay-as-you-go billing method, the subscription billing method is more cost-effective. You can get higher discount if you purchase a larger storage plan. For more information, see the Subscription-based storage plans section of the "Storage fees" topic.