Help Center/ MapReduce Service/ FAQs/ MRS Basics/ What Are Regions and AZs?
Updated on 2024-08-16 GMT+08:00
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What Are Regions and AZs?

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

  • Regions are defined in terms of geographical locations and network latencies. 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 common regions and dedicated regions. 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 independent cooling, fire extinguishing, moisture-proof, and electricity facilities. The computing, network, storage, and other resources in an AZ are logically divided into multiple clusters. AZs within a region are interconnected using high-speed optical fibers to allow you to build cross-AZ high-availability systems.

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 as required. For more information, see HUAWEI CLOUD Global Regions.

What Are the Considerations for Selecting a Region?

When selecting a region, consider the following factors:

  • Location

    You are advised to select a region closest to your target users. This reduces network latency and improves access rate. However, there is no distinct difference between the infrastructure, BGP network quality, and resource operations and configurations in the same region/country. Therefore, you do not need to consider the network latency when selecting a region in a country.

    • If you or your target users are in the Asia Pacific area excluding the Chinese mainland, select the CN-Hong Kong, 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 price

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

What Are the Considerations for Selecting an AZ?

Consider the requirements for disaster recovery (DR) and network latency when selecting an AZ:

  • Deploy resources in different AZs in the same region for DR purposes.
  • Deploy resources in the same AZ for minimum latency.

How Do I Obtain an Endpoint?

When you use resources by using an API, you must specify its regional endpoint. For details about Huawei Cloud regions and endpoints, see Regions and Endpoints.

Parent topic: MRS Basics