Multi-Region Backup Strategies for Amazon Aurora
Authors: Leonard Runyowa, Kyle Stephenson, Jim Williams, Stephanie Els, Nick Johnson Published: June 3, 2025
A regional outage isn’t common, but if it happens you don’t want to be the one explaining why the app is down. In this post we’ll go through two ways we keep Aurora safe across regions and help you decide which one is right for your workload and budget and RPO (Recover Point Objective... basically how much time worth of data did you lose when the db went down) and RTO (Recovery Time Objective basically how long it takes to come back up).
Why Go Multi-Region?
- Compliance, customers, and execs love numbers like RTO < 1 hour and tiny data loss.
- Regional disruptions and operator errors still happen. Architecting for failure keeps your recovery objectives within reach.
Strategy 1 — Aurora Cross Region Database with a Headless Cluster
What It Looks Like
For RPO purposes the Cross Region Headless Cluster is the best option for a low cost cross region replication. The data is continually replicating from Region A to Region B. If there is an issue and you need to switch regions then we just need to create the new writer in the Region B for the cluster that already exists there.
How We Set It Up via console
- Launch your primary Aurora PostgreSQL cluster in Region A.
- In the RDS console hit Add Region, pick Region B—AWS builds the headless cluster for you.
- Keep an eye on replication lag in the Global DB dashboard and wire up CloudWatch alarms.
RTO & RPO at a Glance
- RPO: < 1 second
- RTO: 5–20 minutes (promotion + writer launch)
What It Costs (500 GB example)
| Piece | $ / Month |
|---|---|
| Storage in Region A | $50 |
| Storage in Region B | $50 |
| Replication traffic | ~ $10 |
| Standby compute | $0 (until failover) |
The good and the bad
| Good | Bad |
|---|---|
| Near-zero data loss | Extra storage & network cost |
| Failover in a coffee-break | More moving parts |
| Native monitoring | Need KMS keys in both regions |
Use it when: When .
Strategy 2 — AWS Backup with Cross-Region Snapshots
What It Looks Like
This is the “classic” snapshot route: AWS Backup takes scheduled snapshots in your main region and copies them to a vault in another region. When the worst happens you restore the snapshot and bring up a fresh cluster. In general we would not recommend this for your only backup method this should be used in addition to other backup methods like multi-AZ.
How We Set It Up
- Make backup vaults in both regions.
- Create a backup plan—hourly, daily, whatever fits.
- Add a cross-region copy action pointing to the secondary vault.
- Tag or directly assign the Aurora cluster to the plan.
- Watch jobs in the Backup console or pipe events to EventBridge and Slack.
RTO & RPO
- RPO: ~1–3 hours (depends how often you snapshot)
- RTO: 1–3 hours (restore + cluster build)
What It Costs (500 GB example)
| Piece | $ / Month |
|---|---|
| Storage in Region A | $50 |
| Storage in Region B | ~ $0.50 - $10 |
| Replication traffic | ~ $10 |
| Standby compute | $0 (until failover) |
The good and the bad
| Good | Bad |
|---|---|
| Dead-simple to set up | Slower recovery |
| Zero standby compute cost | Data loss since last snapshot |
| Fine-grained retention | Some manual orchestration on restore |
Use it when: you need a safety net but can live with an hour or two of downtime and data loss.
Quick Comparison
| Question | Global DB (headless) | AWS Backup |
|---|---|---|
| RPO | ~1 s | 1–3 h |
| RTO | 5–20 min | 1–3 h |
| Idle cost | $0 compute | $0 compute |
| Setup effort | Moderate | Easy |
| Best fit | Mission-critical, low-latency | Cost-sensitive, non-critical |
Decision Cheat-Sheet
| You need… | Go with… |
|---|---|
| RTO ≤ 15 min & RPO ≤ 1 min | Headless Cluster |
| Cheap DR | AWS Backup snapshots |
Pro Tips
- Automate everything—Terraform or CloudFormation, your pick.
- Encrypt everything—replicate KMS keys and nail your IAM policies.
- Drill, drill, drill—run quarterly failover exercises; don’t wait until 3 a.m. in production.
- Watch the dials—
AuroraGlobalDBReplicationLagand Backup events are early warning sirens.
Wrap-Up
Bottom line: if seconds count, a cross region Headless Cluster is your best. If you can handle a bit of downtime, don’t mind some data loss and want to save cash, snapshots get the job done. Pick the path that matches your RTO/RPO targets, automate it, and rest a little easier.