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Region and AZ

The region and Availability Zone (AZ) are used to describe the location of a data center. You can create resources in a specific AZ of a region.

  • Regions are divided based on 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 into universal regions and dedicated regions. A universal region provides universal cloud services for common tenants. A dedicated region provides specific services for specific tenants.
  • An AZ contains one or more physical data centers. Each AZ has independent cooling, fire extinguishing, moisture-proof, and electricity facilities. Within an AZ, computing, network, storage, and other resources are logically divided into multiple clusters. AZs within a region are interconnected using high-speed optical fibers to support cross-AZ high-availability systems.

Figure 1 shows the relationship between the region and AZ.

Figure 1 Regions and AZs

Currently, HUAWEI CLOUD provides services in many regions around the world. You can select a region and AZ as needed.

How Do I Select a Region?

When selecting a region, consider the following factors:

  • Location

    You are advised to select a region close to you or your target users. This reduces the network delay and improves the access speed. However, in terms of infrastructure, BGP network quality, and resource operation and configuration, different regions in Chinese mainland are almost equivalent to each other. If you or your target users are in Chinese mainland, you do not need to consider the network delay issue when selecting the region.

    Other countries and regions, such as Hong Kong and Bangkok, provide services to users outside Chinese mainland with international bandwidth. If you or your target users are in Chinese mainland, these regions are not recommended because they have a long access delay.

    • If you have services in the Asia-Pacific region, select the AP-Hong Kong, AP-Bangkok, or AP-Singapore region.
    • If you have services in Africa, select the SA-Johannesburg region.
    • If you have services in Europe, select the EU-Paris region.
  • Resource price

    Resource prices may vary in different regions. For details, see Product Pricing Details.

How Do I Select an AZ?

When choosing whether to deploy resources in the same AZ, you need to consider your requirements for disaster recovery (DR) capability and network latency.

  • If your application requires good DR capability, you are advised to deploy resources in different AZs in the same region.
  • If your application requires a low network latency between instances, you are advised to deploy resources in the same AZ.

Regions and Endpoints

When using an API to use resources, you must specify its region and endpoint. For details about HUAWEI CLOUD regions and endpoints, see Regions and Endpoints.

When using an API to use resources, you must specify its region and endpoint. Obtain the regions and endpoints from the enterprise administrator.