Question

A financial services company stores regulated transaction records in an S3 bucket in us-east-1 encrypted with SSE-S3. Compliance requires that copies of every object be replicated to a bucket in eu-west-1 within a predictable, contractually guaranteed time window, and the team must be able to prove replication SLA adherence to auditors with metrics and alerts. Which approach BEST meets these requirements?

Accepted Answer

Enable S3 Cross-Region Replication with S3 Replication Time Control (S3 RTC), which replicates objects within a 15-minute SLA and publishes replication metrics and event notifications for monitoring.

Answer

Enable standard S3 Cross-Region Replication and configure an S3 Lifecycle rule to transition replicated objects, relying on CloudTrail data events to prove replication timing to auditors.

Answer

Use S3 Batch Replication on a daily schedule to copy new objects to the destination bucket and enable S3 Storage Lens to report on replication latency.

Answer

Configure Same-Region Replication first, then use AWS DataSync to move objects cross-region on a scheduled task with CloudWatch alarms on task duration.