Amazon Simple Storage Service (S3) Cross-Region Replication (CRR) is a feature that enables automatic, asynchronous replication of objects across buckets in different AWS regions. This feature allows you to store a copy of your data in a different region to protect against data loss due to regional outages, or to improve performance by storing data closer to your users.
Here are some key concepts and benefits of using S3 CRR:
- Automatic Replication: S3 CRR automatically replicates new and updated objects to the destination bucket, ensuring that the data remains consistent across both regions.
- Asynchronous Replication: S3 CRR is an asynchronous replication, which means that there may be a delay between when an object is updated in the source bucket and when it is updated in the destination bucket.
- Object Ownership: The owner of the object in the source bucket is also the owner of the object in the destination bucket.
- Versioning Compatibility: S3 CRR is compatible with versioning, which means that you can enable versioning on the source and destination buckets, and S3 CRR will automatically replicate all versions of an object.
- Data Encryption: S3 CRR supports server-side encryption, which allows you to encrypt data both at rest and in transit.
- Cost-Effective: S3 CRR is a cost-effective solution for replicating data across regions, as you only pay for the storage and data transfer costs.
Enabling S3 CRR can be done through the AWS Management Console, AWS CLI, or the S3 API. It’s important to consider the cost of replicating data across regions, and also to have a plan to manage the lifecycle of the replicated data.