A PolarDB-X 1.0 instance consists of the compute layer and the storage layer resources. The compute layer is a distributed cluster that consists of multiple Distributed Relational Database Service (DRDS) server nodes and business data is stored in multiple ApsaraDB RDS for MySQL instances attached to the PolarDB-X 1.0 instance. Currently, all PolarDB-X 1.0 are dedicated instances.
Primary instances
PolarDB-X 1.0 primary instances are used for scaling of single-instance relational databases and can process real-time online transactions with high concurrency.
Dedicated instances
Dedicated instances offer exclusive physical resources.
