Cluster types to create

After you start to create your cluster, the Cluster Info tab prompts you to select the type of cluster to create. This tab also appears when you're editing a cluster.

• Single Node creates a cluster with one primary and no standby replicas. This type of cluster is suited for test environments where high availability might not be required. You can create single-node clusters running PostgreSQL, EDB Postgres Extended Server, or EDB Postgres Advanced Server.

• High Availability creates a cluster with one primary and multiple standby replicas in different availability zones. You can create high-availability clusters running PostgreSQL, EDB Postgres Extended Server, or EDB Postgres Advanced Server.
  
  If you select High Availability, you're prompted to specify the number of standby replicas for your cluster. The default is 2.

• Advanced High Availability delivers single-region, multi-AZ resilience with fast, automated failover; online upgrades; and logical replication via primary/standby nodes.
  
  If you select Advanced High Availability, the tabs DB Configuration and Additional Settings no longer appear. The Data Groups tab appears instead.

• Distributed High Availability creates a cluster, powered by EDB Postgres Distributed (PGD), with three nodes and up to two data groups spread across three availability zones. This configuration delivers higher performance and faster recovery. You can create distributed high-availability clusters running PostgreSQL, EDB Postgres Extended Server, or EDB Postgres Advanced Server.
  
  If you select Distributed High Availability, the tabs DB Configuration and Additional Settings no longer appear. The Data Groups tab appears instead.

See Supported cluster types for more information.