Concepts
The combination of a region and an availability zone (AZ) identifies the location of a data center. You can create resources in a specific AZ in a region.
- Regions are defined by their geographical location and network latency. Public services, such as Elastic Cloud Server (ECS), Elastic Volume Service (EVS), Object Storage Service (OBS), Virtual Private Cloud (VPC), Elastic IP (EIP), and Image Management Service (IMS), are shared within the same region. Regions are classified as universal regions and dedicated regions. A universal region provides universal cloud services for common tenants. A dedicated region provides only services of the same type or provides services only for specific tenants.
- An AZ is a physical location where resources use independent power supplies and networks. A region contains one or more AZs that are physically isolated but interconnected through the internal network. The fault of an AZ will not affect other AZs. The internal network provides economical connection with low latency.