Amazon S3 Replication Time Control (S3 RTC), a feature of S3 Replication that provides a predictable replication time backed by a Service Level Agreement (SLA), is now available in the AWS GovCloud (US) Regions.
Customers use S3 Replication to replicate billions of objects across buckets to the same or different AWS Regions and to one or more destination buckets. S3 RTC is designed to replicate 99.99% of objects within 15 minutes after upload, with the majority of those new objects replicated in seconds. S3 RTC is backed by an SLA with a commitment to replicate 99.9% of objects within 15 minutes during any billing month. With S3 RTC enabled, customers can also view S3 Replication metrics (via CloudWatch) by default to monitor the time taken to complete replication, the total number and size of objects that are pending replication, as well as the number of objects that failed to replicate per minute due to misconfiguration or permission errors.
Source:: Amazon AWS