Cross-region replication (CRR) provides automatic and asynchronous (near real-time) replication of objects across buckets in different Object Storage Service (OSS) regions. CRR can also synchronize operations such as create, overwrite, and delete operations performed on objects from a source bucket to a destination bucket.
Usage notes
- Billing
- You are charged for the traffic that is generated when you use CRR to replicate objects in OSS. For more information about the billing methods, see Traffic fees.
- Each time an object is synchronized, OSS counts the number of requests, and you are charged for the requests. For more information about the billing methods, see API fees.
- If you enable transfer acceleration, you are charged for the use of this feature. For more information about the billing methods, see Transfer acceleration fees.
- Replication time
In CRR, data is replicated asynchronously. Depending on the amount of data, it can take a few minutes to several hours to replicate data to the destination bucket.
Limits
- Limits on regions
- CRR is unavailable in the Philippines (Manila) region. For more information about the regions in which OSS data centers are located, see Regions and endpoints.
- You must enable transfer acceleration when you perform CRR across regions inside and outside the Chinese mainland.
- CRR rules based on object tags can be configured only in the following scenarios:
- The source region is China (Hangzhou), and the destination region is a region except for China (Hangzhou).
- The source region is Australia (Sydney), and the destination region is a region outside the Chinese mainland and except for Australia (Sydney).
- Limits on operations
- You can configure CRR between two unversioned buckets or two versioned buckets.
- The versioning status of two buckets between which a CRR rule is configured cannot be changed.
- If you configure a CRR rule for two buckets, an object replicated from the source bucket may overwrite an object that has the same name in the destination bucket.
- You can configure CRR rules to synchronize data from a source bucket to multiple destination buckets. By default, you can configure up to 100 CRR rules for a bucket. The bucket can be specified as a source bucket or a destination bucket. If you want to configure more than 100 CRR rules for a bucket,contact technical support.
Enable CRR
Disable CRR
You can click Disable to disable CRR.

After you disable CRR, the replicated data is stored in the destination bucket. However, the incremental data in the source bucket is not replicated to the destination bucket.