PolarDB for MySQL provides the following editions: Cluster, Multi-primary Cluster, Single Node, and Archive Database. This topic introduces each edition.

  • The Cluster Edition is developed based on an architecture in which storage and compute are decoupled. In a cluster of the Cluster Edition, the number of compute nodes can be increased from 2 to a maximum of 16. For more information, see Cluster Edition.
  • The Singe Node Edition is developed based on a single-node architecture and uses nodes of the burstable performance type. All clusters of the Single Node Edition share the resources in a computing resource pool. This improves resource utilization and reduces resource costs because no proxy is required. For more information, see Single Node Edition.
  • The Archive Database Edition provides a high compression ratio and uses X-Engine as the default storage engine. This edition allows for a large storage capacity at a low cost to store archived data. For more information, see Archive Database Edition.
  • The Multi-primary Cluster Edition is developed based on a multi-primary architecture that contains multiple primary nodes and read-only nodes. This architecture is suitable for high concurrent read and write scenarios such as multitenancy, gaming, and e-commerce. For more information, see Multi-primary cluster edition.