Run PostgreSQL across redundant cloud instances with streaming replication, automatic failover, and dedicated Witness monitoring.
Designed for production workloads that require database redundancy and automatic Primary failover.
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Choose the cloud instances for your Primary, Standby, and Witness nodes. Final cluster cost depends on the number of nodes and resources you provision.
| Plan | vCPU | RAM | Hourly Price | Monthly Price | |
|---|---|---|---|---|---|
Popular | Get StartedGet Started |
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Pricing comparison based on equivalent configurations as of 1 August 2026.
Handles normal application reads and writes.
Continuously receives database changes from the Primary using PostgreSQL streaming replication.
Provides additional visibility during failover decisions and monitors the HA cluster.
repmgrd detects the Primary failure.
Standby and Witness validate cluster visibility.
The eligible Standby is automatically promoted.
The promoted node becomes the new writable Primary.
Witness monitoring switches to the new Primary.
Failover involves detection, validation, and promotion steps in sequence — it is automatic, but not instantaneous.
Because asynchronous replication is used, a small amount of recent data could theoretically be lost if the Primary fails before it reaches the Standby.
The dedicated Witness provides an independent view of Primary availability and assists repmgr during failover decisions.
PostgreSQL HA architectures can also be deployed across multiple AccuWeb.Cloud regions for geographic redundancy and disaster recovery.
A Witness node provides additional visibility during failover decisions.
Multi-region architecture should be designed according to:
After failover, the former Primary should remain offline until safely recovered. Supported approaches include:
Fencing the failed Primary helps prevent two writable PostgreSQL Primaries from operating simultaneously.
For multi-region deployments, secure inter-region connectivity appropriate to the architecture is used.
You retain full administrative control over your PostgreSQL cluster environment.
High availability protects against node failure, while backups help protect against deletion, corruption, and other data-loss scenarios.
HA cluster architecture should be planned according to:
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Run PostgreSQL across redundant cloud instances with streaming replication, automatic failover, dedicated Witness monitoring, and optional multi-region architecture.
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