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Multi-region deployment

Cross-region logical replication, automatic failover, data residency by country. Patterns for global SaaS with local latency without sacrificing consistency.

12 min read·Level advanced·Revised on Apr 15, 2026
This English text was generated automatically from the French original and has not been reviewed yet.
#
Topologies

Three common patterns

  • Single region (default) — everything in eu-west-3: Postgres, Storage, Functions, CDN. Minimum intra-region latency, single point of failure at the AWS region level.
  • Primary + read replicas — primary in one region, read replicas in others (eu → us-east + apac). Centralized writes, distributed reads.
  • Active-active multi-region (Enterprise) — Postgres with BDR (bi-directional replication), logical decoding per table, custom conflict resolution.
#
Logical replication

Table by table, filtered

Enable logical replication from the Studio or CLI. Choose the tables to replicate (fine granularity: exclude heavy, non-critical tables).

Attention

Roadmap — not available. The aura commands shown below are planned and not delivered yet: the CLI does not have them today.

clibash
# Create a read-only replica in us-east-1
aura replica create \
  --region us-east-1 \
  --tables orders,products,customers \
  --mode logical

# Lag monitoring
aura replica status --region us-east-1
# → lag: 120ms · last_lsn: 7/3F2A12E8 · healthy
#
Failover

Automatic within 30 seconds

Our agent monitors each primary with multi-AZ health checks. On confirmed failure (3 consecutive checks), a replica is promoted in ~30s. The gateway switches connections automatically.

Attention

During failover, writes are queued on the SDK client side (automatic retry with backoff). Readings continue on surviving replicas.

#
Data residency

Pinning by country on Enterprise

Plan Enterprise: Pins each project to a country. Data, backups, replicas and CDN caches never leave the territory — contractual commitment, without third-party certification to date.

EN

France

GDPR

FROM

Germany

GDPR

US

United States

CCPA

UK

United Kingdom

UK GDPR

J.P.

Japan

APPI

BR

Brazil

LGPD

Last updated · Apr 15, 2026