Natural Language ProcessingNatural Language Processing

Elastic Cloud Server
Bare Metal Server
Auto Scaling
Image Management Service
Dedicated Host
Virtual Private Cloud
Elastic IP
Elastic Load Balance
NAT Gateway
Direct Connect
Virtual Private Network
Domain Name Service
VPC Endpoint
Cloud Connect
Enterprise Switch
Security & Compliance
Web Application Firewall
Host Security Service
Data Encryption Workshop
Database Security Service
Advanced Anti-DDoS
Data Security Center
Container Guard Service
Situation Awareness
Managed Threat Detection
Cloud Certificate Manager
Anti-DDoS Service
Relational Database Service
Document Database Service
Data Admin Service
Data Replication Service
GaussDB(for MySQL)
Distributed Database Middleware
GaussDB(for openGauss)
Developer Services
Distributed Cache Service
Simple Message Notification
Application Performance Management
Application Operations Management
API Gateway
Cloud Performance Test Service
Distributed Message Service for Kafka
Distributed Message Service for RabbitMQ
Distributed Message Service for RocketMQ
Cloud Service Engine
Cloud Communications
Message & SMS
Cloud Ecosystem
Partner Center
User Support
My Account
Billing Center
Cost Center
Resource Center
Enterprise Management
Service Tickets
HUAWEI CLOUD (International) FAQs
ICP License Service
Support Plans
Customer Operation Capabilities
Partner Support Plans
Professional Services
Intelligent EdgeFabric
SDK Developer Guide
API Request Signing Guide
Koo Command Line Interface
Updated at: Feb 22, 2022 GMT+08:00

Regions and AZs


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

  • Regions are divided from the dimensions of 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 services of the same type only or 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 allow you to build cross-AZ high-availability systems.

Figure 1 shows the relationship between the regions and AZs.

Figure 1 Regions and AZs

Services of HUAWEI CLOUD are available in many regions around the world. You can select a region and AZ as needed.

How Should I Select a Region?

When selecting a region, consider the following factors:

  • Geolocation

    You are advised to select a region close to you or your target users. This reduces network latency and improves access speed. However, the Chinese mainland regions provide the same infrastructure, BGP network quality, as well as resource operations and configurations. Therefore, if you or your target users are in the Chinese mainland, you do not need to consider the network latency differences when selecting a region.

    • 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.
  • Related cloud services

    If you use multiple cloud services together, pay attention to the following constraints:

    • ECSs, RDS instances, and OBS buckets in different regions cannot communicate with each other through an internal network.
    • ECSs in different regions cannot be bound to the same load balancer.
  • Resource price

    Resource prices may vary in different regions.

How Should I Select an AZ?

When determining whether to deploy resources in the same AZ, consider your application's requirements on disaster recovery (DR) and network latency.

  • For high DR capability, deploy resources in different AZs in the same region.
  • For low network latency, deploy resources in the same AZ.

Regions and Endpoints

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

Did you find this page helpful?

Failed to submit the feedback. Please try again later.

Which of the following issues have you encountered?

Please complete at least one feedback item.

Content most length 200 character

Content is empty.

OK Cancel