What Are Regions and AZs?
Concepts
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.
Huawei Cloud provides services in many regions around the world. You can select a region and AZ as needed.
Selecting a Region
- Location
You are advised to select a region close to you or your target users. This reduces network latency and improves access rate.
- If you or your users are in the Asia Pacific region and outside the Chinese mainland, select the CN-Hong Kong, AP-Bangkok, or AP-Singapore region.
- If you or your users are in Africa, select the AF-Johannesburg region.
- If you or your users are in Latin America, select the LA-Santiago region.
- Resource price
Resource prices may vary in different regions. For details, see Product Pricing Details.
Selecting an AZ
When determining whether to deploy resources in the same AZ, consider your applications' 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
Before using an API to call resources, specify its region and endpoint. For more details, see Regions and Endpoints.
About WAF FAQs
- FAQs
- Can WAF Protect an IP Address?
- What Objects Does WAF Protect?
- Does WAF Block Customized POST Requests?
- Does WAF Protect Traffic from Both IPv4 and IPv6 Addresses?
- What Are the Differences Between the Web Tamper Protection Functions of WAF and HSS?
- Which Web Service Framework Protocols Does WAF Support?
- Can WAF Protect Websites Accessed Through HSTS or NTLM Authentication?
- What Are the Differences Between WAF Forwarding and Nginx Forwarding?
- What Are the Differences Between WAF and CFW?
- Can I Configure Session Cookies in WAF?
- How Does WAF Detect SQL Injection, XSS, and PHP Injection Attacks?
- Can WAF Defend Against the Apache Struts2 Remote Code Execution Vulnerability (CVE-2021-31805)?
- Why Does the Vulnerability Scanning Tool Report Disabled Non-standard Ports for My WAF-Protected Website?
- What Are the Restrictions on Using WAF in Enterprise Projects?
- How Do I Obtain the Real IP Address of a Web Visitor?
- Will Traffic Be Permitted After WAF Is Switched to the Bypassed Mode?
- What Are Local File Inclusion and Remote File Inclusion?
- What Is the Difference Between QPS and the Number of Requests?
- Does WAF Support Custom Authorization Policies?
- How Do I Configure My Server to Allow Only Requests from WAF?
- Why Do Cookies Contain the HWWAFSESID or HWWAFSESTIME field?
- Can I Switch Between the WAF Cloud Mode and Dedicated Mode?
- Can I Add a Domain Name or IP Address to WAF Under Different Accounts?
- How Do I Configure WAF If a Reverse Proxy Server Is Deployed for My Website?
- How Does WAF Forward Access Requests When Both a Wildcard Domain Name and a Single Domain Name Are Connected to WAF?
- What Are Regions and AZs?
- Can I Use WAF Across Regions?
- In Which Regions Is WAF Available?
- Can I Use WAF Across Enterprise Projects?
- Can I Use a WAF Instance in a Specific Enterprise Project for Other Enterprise Projects?
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