What information is necessary to configure S3 Cross-Region Replication?

To configure S3 Cross-Region Replication, specifying the source and destination buckets is essential. The source bucket is the Amazon S3 bucket that contains the original data you want to replicate, while the destination bucket is the target bucket in another AWS region where the data will be copied. This setup ensures that the necessary data flows seamlessly between the two regions, providing advantages such as increased redundancy, compliance with data residency regulations, and disaster recovery options.

The source and destination buckets need to be explicitly defined because they establish the replication relationship. Without identifying these buckets, the system would not know where to replicate the data from or where to send it. This configurational element is fundamental to the entire process, making it the key piece of information needed to enable Cross-Region Replication in S3.

Other options such as an organization account number, a Virtual Private Cloud identifier, or access control lists are not required for setting up Cross-Region Replication. While they may play roles in broader AWS account management and resource access, they do not directly impact the replication settings within S3.