Purchase a cluster

This topic describes how to create a PolarDB cluster in the PolarDB console.

Background information

A PolarDB for PostgreSQL (Compatible with Oracle) cluster consists of a primary node and up to 15 read-only nodes. We recommend that you retain at least one read-only node. The primary node and read-only nodes use the active-active failover method to implement high availability. A node is a virtual database server. You can create and manage multiple databases on a node.

Note

To fully leverage the performance of PolarDB, your PolarDB cluster needs to be deployed in the same internal network with other Alibaba Cloud services. To make full use of the capabilities provided by PolarDB, we recommend that you deploy PolarDB clusters and Elastic Compute Service (ECS) instances in the same VPC.

Purchase method

Description

Quick purchase

You can purchase a PolarDB for PostgreSQL (Compatible with Oracle)with simple configurations within minutes. This method improves your purchase efficiency.

Custom purchase

You can purchase a PolarDB for PostgreSQL (Compatible with Oracle) cluster in the following ways:

Create Primary Cluster: creates a new PolarDB cluster.
Restore from Recycle: creates a cluster by restoring a backup file of a deleted cluster from the recycle bin.

Related API operations

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.