Global cloud service providers (CSP) are generally organized in a three-level structure:
- CSP data centers: Individual physical data centers that house physical computers, storage, data center networking, environmental management equipment, and electrical power.
- CSP availability zones: An availability zone (AZ) consists of two or more geographically local data centers. The AZ data centers will normally have independent sources of power and data connectivity.
- CSP regions: A region typically consists of two or more availability zones. To ensure operational geographical redundancy, cloud-based solutions should deploy redundant infrastructures in two or more regions with mutual data backup capability.
Here’s a map of Oracle Cloud’s global regions (as of May 14, 2021)
Similarly, AWS also has global regions which are then further divided into Availability Zones (AZ)
