Detect stalled Amazon S3 live replication to prevent unexpected storage costs
Storage Blog
This article demonstrates how to detect stalled Amazon S3 replication using CloudWatch metrics and alarms to prevent unexpected storage costs.
- Enable S3 Replication metrics to publish minute-by-minute visibility into replication health to CloudWatch
- Create CloudWatch alarms on OperationsFailedReplication, OperationsPendingReplication, and ReplicationLatency metrics
- Route replication failure events to Amazon SQS for on-demand investigation of specific failure reasons
- Use S3 Batch Replication to bulk-replay failed objects after fixing the underlying issue
- S3 Lifecycle now protects objects with FAILED replication status from premature expiration
- Monitoring costs approximately $1.30/month per replication rule, negligible versus undetected stalled replication costs
Proactive replication monitoring enables early detection of failures, rapid remediation, and automatic lifecycle rule resumption after recovery.
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