Question

A financial services company runs a trading dashboard backed by a DynamoDB table in us-east-1. Leadership requires that the application continue accepting both reads and writes with near-zero data loss and sub-minute recovery if the entire us-east-1 region becomes unavailable. Application traffic is served from ALBs in both us-east-1 and eu-west-1 fronted by Route 53. Which approach best meets the availability and RPO/RTO requirements with the least operational effort?

Accepted Answer

Convert the table to a DynamoDB global table with a replica in eu-west-1, and configure Route 53 health checks with failover routing so traffic shifts to the eu-west-1 endpoint automatically.

Answer

Enable point-in-time recovery (PITR) on the table and use an EventBridge-triggered Lambda to restore the latest snapshot into eu-west-1 when a CloudWatch alarm detects the outage.

Answer

Enable DynamoDB on-demand backups every 5 minutes and copy them to eu-west-1 with AWS Backup cross-region copy, restoring the most recent backup during a regional failure.

Answer

Deploy a read replica of the DynamoDB table in eu-west-1 and promote it to a primary using a runbook executed by the on-call engineer when us-east-1 fails.