Regions and AZs

Concepts

A region and availability zone (AZ) identify the location of a data center. You can create resources in regions and AZs.

• Regions are defined in terms of geographical location and network latency. Each region has its own shared public services (ECS, EVS, OBS, VPC, EIP, and IMS). Regions are either common or dedicated. A common region provides common cloud services available to all tenants. A dedicated region provides services of a specific type or only for specific tenants.
• An AZ contains one or more physical data centers. Each AZ has its own independent power source, network, and cooling. The computing, network, storage, and other resources in an AZ can be logically divided into multiple clusters. AZs in a region are interconnected through high-speed optic fiber, so systems deployed across AZs can achieve higher availability.

Figure 1 shows the relationship between regions and AZs.

Figure 1 Regions and AZs

HUAWEI CLOUD provides services worldwide. You can select a region and AZ based on your own needs. For more information, see Global Products and Services.

How Do I Select a Region?

When selecting a region, consider the following:

• Location

  Select a region close to you or your target users for lower network latency and faster access. All regions in the Chinese mainland provide the same infrastructure, BGP network quality, and operations and configurations on resources. Therefore, if your target users are in the Chinese mainland, you do not need to consider network latency differences when selecting a region.

  Regions outside the Chinese mainland, such as Bangkok and Hong Kong, provide services for users outside the Chinese mainland. If you or your target users are in the Chinese mainland, do not select these regions, as doing so will lead to high latency.

  • If you or your target users are in the Asia Pacific region (excluding the Chinese mainland), select the AP-Bangkok or AP-Singapore region.
  • If you or your target users are in Africa, select the AF-Johannesburg region.
  • If you or your target users are in Europe, select the EU-Paris region.
• Resource pricing

  This varies by region. For details, see the pricing details.

How Do I Select an AZ?

Consider your requirements for DR and network latency when selecting an AZ:

• Deploy resources in different AZs in the same region to improve DR.
• For an application that requires an extremely low latency, deploy all its resources in the same AZ.

Regions and Endpoints

When you use resources with API calls, you must specify the regional endpoint. For details about Huawei Cloud regions and endpoints, see Regions and Endpoints.