Purchase a PolarDB for PostgreSQL cluster-PolarDB(PolarDB)-阿里云帮助中心

Purchase a PolarDB for PostgreSQL cluster from the PolarDB console.

Cluster editions

The maximum number of read-only nodes in a centralized PolarDB for PostgreSQL cluster depends on the Database Edition. Enterprise Edition: one primary node and up to 15 read-only nodes. Standard Edition: one primary node and up to 7 read-only nodes. For high availability, keep at least one read-only node per cluster. The primary and read-only nodes use active-active failover — if the primary node fails, a read-only node automatically takes over.

Note
PolarDB performs optimally only when communicating with other Alibaba Cloud services over the internal network. Deploy your PolarDB cluster in the same VPC as your Elastic Compute Service (ECS) instance. If PolarDB and ECS are not in the same VPC, PolarDB cannot deliver optimal performance.
A PolarDB for PostgreSQL Distributed Edition cluster extends the PolarDB for PostgreSQL Centralized Edition cluster with a two-layer architecture of compute nodes (CNs) and data nodes (DNs) for distributed scalability and compute-storage separation. It retains all capabilities of the PolarDB for PostgreSQL Centralized Edition cluster and meets enterprise-level performance and reliability requirements.

Purchase method	Description
Quick purchase	Purchase a PolarDB for PostgreSQL Enterprise Edition or Standard Edition cluster in minutes.
Custom purchase	Purchase a PolarDB for PostgreSQL Enterprise Edition or Standard Edition cluster using one of the following methods: Create Primary Cluster: creates a new PolarDB cluster. Migrate from RDS: clones data from an ApsaraDB RDS instance and synchronizes incremental data. Restore from Recycle Bin: creates a new cluster by restoring a deleted cluster from the recycle bin.
Create a PolarDB for PostgreSQL distributed cluster	Create a PolarDB for PostgreSQL Distributed Edition cluster. The Distributed Edition uses a two-layer architecture of compute nodes (CNs) and data nodes (DNs) for distributed scalability and compute-storage separation.

API	Description
CreateDBCluster	Creates a PolarDB cluster.
DescribeDBClusters	Queries PolarDB clusters.
DescribeDBClusterAttribute	Queries the information about a PolarDB cluster.
DescribeAutoRenewAttribute	Queries the auto-renewal feature status for a subscription PolarDB cluster.
ModifyAutoRenewAttribute	Configures the auto-renewal feature for a subscription PolarDB cluster.