CloudMirror replication copies objects from a source bucket to a destination bucket that is specified in an endpoint. To enable CloudMirror replication for a bucket, you must create and apply valid bucket replication configuration XML. The replication configuration XML must use an S3 bucket endpoint URN as its destination.
For general information on bucket replication and how to configure it, see the Amazon documentation on Cross-Region replication. For information on how StorageGRID Webscale implements the S3 bucket replication configuration API, see the StorageGRID Webscale S3 Implementation Guide.
If you enable CloudMirror replication on a bucket that contains objects, new objects added to the bucket are replicated but the existing objects in the bucket are not. You must update existing objects to trigger replication.