Amazon S3 adds new visibility into object replication status

Amazon S3 adds a new Amazon CloudWatch metric that can be used to diagnose and correct S3 Replication configuration issues more quickly. The OperationFailedReplication metric, available in both the S3 console and in Amazon CloudWatch, gives you per-minute visibility into the number of objects that did not replicate to the destination bucket for each of your replication rules.

Source:: Amazon AWS