Availability, scaling & operations · AWS vs Google Cloud
Amazon RDS Multi-AZ deployments vs Cloud SQL Enterprise Plus edition features (HA, advanced DR, managed connection pooling)
RDS Multi-AZ maps to Cloud SQL high availability (a regional instance with a primary and standby in two zones) and AlloyDB's built-in HA.
Side-by-side comparison
| Aspect | Amazon Web Services | Google Cloud |
|---|---|---|
| Service | Amazon RDS Multi-AZ deployments | Cloud SQL Enterprise Plus edition features (HA, advanced DR, managed connection pooling) |
| Lifecycle | Generally available | Generally available |
| What it is | Synchronous standby in another AZ with automatic failover (Multi-AZ DB instance), or a Multi-AZ DB cluster with two readable standbys for MySQL and PostgreSQL. | Regional HA instances, cross-region DR replicas with switchover, and managed connection pooling (Enterprise Plus) for Cloud SQL. |
| Pricing model | Multi-AZ roughly doubles instance cost (the standby is billed), plus storage for each copy. | HA (regional) instances cost more than zonal instances; see Cloud SQL pricing. |
| Docs | Amazon RDS Multi-AZ deployments docs | Cloud SQL Enterprise Plus edition features (HA, advanced DR, managed connection pooling) docs |
| Pricing page | Amazon RDS Multi-AZ deployments pricing | Cloud SQL Enterprise Plus edition features (HA, advanced DR, managed connection pooling) pricing |
Key differences
- Failover promotes the standby in the secondary zone, keeping the same IP address.
- Cloud SQL Enterprise Plus has a 99.99% availability SLA including maintenance, versus 99.95% excluding maintenance for Enterprise.
Pricing summary
Pricing models only. No prices are quoted because they change by region and over time.
- AWS
- Multi-AZ roughly doubles instance cost (the standby is billed), plus storage for each copy. Amazon RDS Multi-AZ deployments pricing →
- GCP
- HA (regional) instances cost more than zonal instances; see Cloud SQL pricing. Cloud SQL Enterprise Plus edition features (HA, advanced DR, managed connection pooling) pricing →
And on Azure?
Direct match Azure's equivalent is Zone-redundant high availability (PostgreSQL, MySQL, Azure SQL). AWS vs Azure comparison →
FAQ
What is the Google Cloud equivalent of Amazon RDS Multi-AZ deployments?
RDS Multi-AZ maps to Cloud SQL high availability (a regional instance with a primary and standby in two zones) and AlloyDB's built-in HA.
How does pricing compare between Amazon RDS Multi-AZ deployments and Cloud SQL Enterprise Plus edition features (HA, advanced DR, managed connection pooling)?
AWS: Multi-AZ roughly doubles instance cost (the standby is billed), plus storage for each copy. Google Cloud: HA (regional) instances cost more than zonal instances; see Cloud SQL pricing. Check the official pricing pages for current rates.
What is the Azure equivalent?
Zone-redundant high availability (PostgreSQL, MySQL, Azure SQL) (direct match). RDS Multi-AZ deployments map to zone-redundant high availability in Azure Database for PostgreSQL and MySQL, and to the zone-redundant configurations of Azure SQL Database and Managed Instance.