CDN Acceleration

Service Overview

What Is Huawei Cloud CDN

How CDN Works

Node Distribution

Application Scenarios
Billing

Billing Items

Basic Service Fee

Value-added Service Billing

Changing the Billing Option

Traffic Package Renewal

Expiration and Overdue Payment
Best Practices

Accelerating OBS Resources

Accelerating ECS Resources

Accelerating WAF Resources

Setting the Maximum Cache Age

Improving the Cache Hit Ratio
FAQ

CDN Functions

Purchase and Billing

Domain Name Settings

Cache Settings

Troubleshooting

Try Now Documentation

Content Delivery Network (CDN) is a smart virtual network on the Internet infrastructure. CDN can cache origin content on nodes closer to users, so content can load faster. CDN speeds up site response and improves site availability. It breaks through the bottlenecks caused by low bandwidth, heavy access traffic, and uneven distribution of edge nodes.

Get content delivered from 2,800+ edge nodes from popular carriers in six continents. Bandwidth reaches 150 Tbit/s network-wide.

CDN Acceleration Overview
CDN Acceleration Best Practices
CDN Acceleration Troubleshooting

CDN Acceleration Overview

What Is CDN Acceleration

CDN is a smart virtual network on the Internet infrastructure. CDN can cache origin content on nodes closer to users, so content can load faster.

How CDN Acceleration Works

CDN calculates the node that responds the fast based on preset rules (including content types, geological locations, and network loads), and sends the node IP address to the user.

CDN Acceleration Node Distribution

Huawei Cloud CDN has over 2,000 edge nodes in the Chinese mainland and over 800 edge nodes outside the Chinese mainland. The network-wide bandwidth reaches 150 Tbit/s.

CDN Acceleration Advantages

Rich acceleration node resources: 2,000+ acceleration nodes in Chinese mainland and 800+ acceleration nodes outside the Chinese mainland, providing full-service acceleration capabilities, including website acceleration, download acceleration, and on-demand service acceleration.

CDN Acceleration Application Scenarios

Huawei Cloud CDN provides acceleration services for websites, downloads, on-demand services, and whole sites.

CDN Acceleration Basic Concepts

Static content, dynamic content, acceleration domain name, CNAME record, CNAME, origin server, ...

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CDN Acceleration Best Practices

CDN Accelerating OBS Resources

Huawei Cloud CDN can effectively accelerate websites to deliver a better user experience. OBS buckets can store massive numbers of files. Storing data in OBS buckets and using CDN for service acceleration can both reduce costs and improve user experience

CDN Accelerating ECS Resources

Huawei Cloud CDN can effectively accelerate websites to deliver a better user experience. If you use CDN to accelerate ECS resources, you can improve user experience at low costs.

CDN Accelerating WAF Resources

If your websites have high requirements on security and acceleration, you can associate Huawei Cloud CDN with WAF to accelerate websites and defend against web attacks.

Setting the Maximum Cache Age

CDN caches origin content on globally distributed nodes so that users can obtain the content from nearby nodes. On the CDN console, you can set the maximum cache age for origin content of different file types based on service requirements.

Improving the Cache Hit Ratio

If the CDN cache hit ratio is low, the pressure on the origin server is high and the static resource access efficiency is low. You can select an optimization policy based on the cause of the low cache hit ratio to improve the cache hit ratio. In CDN, the cache hit ratio includes the traffic hit ratio and request hit ratio.

Obtaining Real IP Addresses of Users

After a website is connected to CDN for acceleration, IP addresses obtained by the origin server from IP address headers are not the real IP addresses of users. You can configure your web server to obtain the real IP addresses of users.

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CDN Acceleration Troubleshooting

Can't Access a Web Page or Play a Video After Enable CDN?

Check whether the CDN origin server is faulty, whether CDN acceleration is enabled for the domain name, status code and domain name configuration, and whether your account has outstanding payments.

Displayed or Downloaded Content Incorrect After CDN Acceleration Is Used

Check whether the cache rule is incorrectly set, whether the local cache is faulty, whether the node is not refreshed after the resource is updated, whether files on multiple origin servers are inconsistent, and whether the access resource is hijacked.

4XX Status Code When Request Resources from My Acceleration Domain Name

Check whether your origin server can be accessed, whether your access address complies with referer anti-leeching rules, and whether your IP address blocklist and trustlist and UA blocklist and trustlist are configured.

5XX Status Code When Request Resources from My Acceleration Domain Name

Check whether the origin server is abnormal, whether the bandwidth and traffic increase sharply, and whether cache rules are configured on the origin server.

Status Code 301 or 302 After CDN Acceleration Resources Are Accessed

Check your HTTPS configuration. If the retrieval mode configured on the CDN console is HTTP and forcible redirection HTTPS is enabled on your origin server, cyclic redirection will occur.

CDN Permission Troubleshooting

If you are using CDN as an IAM user with insufficient permissions, view each permission on Permissions Management and ask the account administrator to assign the required permissions to you by referring to Creating a User and Granting CDN Permissions.

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CDN Acceleration Trial Process

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Enabling CDN Show

Enable CDN before you use it.

Steps

1. Log in to the Huawei Cloud console. Choose Service List > Content Delivery & Edge Computing > Content Delivery Network.
2. Click Enable Now.
3. Click Enable Now.

Note

1. You have registered an account on Huawei Cloud and have to completed real-name authentication.
2. You can enable and use CDN in traffic-based billing. To do so, buy a CDN traffic package, refresh the page of enabling CDN, and enable CDN.
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Adding a Domain Name Show

If you want to use CDN to accelerate your business, add the domain name of your site to CDN. CDN caches origin content on edge nodes so that your content loads faster.

Steps

Before adding a domain name, ensure that the domain name complies with the requirements described in Domain Name Requirements.

1. Log in to the Huawei Cloud console. Choose Service List > Content Delivery & Edge Computing > Content Delivery Network.
The CDN console is displayed.
2. In the navigation pane, choose Domains.
3. On the Domains page, click Add Domain Name. In the dialog box displayed, specify domain parameters.
4. Click OK.
5. Check whether the retrieval host needs to be modified. If it does, configure the retrieval host by referring to Retrieval Host.

Note

After a domain name is added, the default retrieval host will be the domain name. Change the retrieval host in a timely fashion if either of the following conditions is met:
1. If you select Domain name for Origin Server Address and enter the domain name of an object storage bucket, set the retrieval host to the domain name of the object storage bucket.
2. If you want CDN to retrieve content from a custom domain name, specify the retrieval host. For example, suppose an origin server is bound to two sites, www.origin01.com and www.origin02.com, and the domain name connected to CDN is www.example01.com. If you need CDN to retrieve content from www.origin02.com, you would need to set the retrieval host to www.origin02.com.
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Configuring CNAME Show

If you have added a domain name, the system automatically assigns a CNAME record to it. The CNAME record cannot be accessed directly. You must add the CNAME record to your domain's DNS records. Then requests for your domain name will be redirected to CDN nodes for acceleration.

Steps

If your domain name is resolved using the DNS service Huawei Cloud provides, then follow the steps in this section to add a CNAME record. download.game-apk1.com is used as an example. Obtain the CNAME record of the domain name. 1. Log in to the Huawei Cloud console. Choose Service List > Content Delivery & Edge Computing > CDN. The CDN console is displayed. 2. In the navigation pane, choose Domains. 3. On the Domains page, copy the CNAME record download.game-apk1.com.c.cdnhwc1.com.
Add the CNAME record. 1. On the console, choose Service List > Networking > Domain Name Service.
The DNS console is displayed. 2. In the navigation pane, choose Public Zones.
The public zone list is displayed. 3. Click the domain name you want to add a record set to. In this example, the domain name is game-apk1.com. 4. Click Add Record Set in the upper right corner.

5. Configure the parameters as instructed.

Note

1. A CNAME record takes effect immediately after being added. If you modify the CNAME record, then the change takes effect within 72 hours.
2. If you encounter a resolution conflict, see DNS Conflicts.
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Checking the CNAME Record Show

The length of time before the CNAME record takes effect depends on the DNS provider.

Steps

1. Open the command line interface that comes with Windows and run the following command:
2. If the CNAME record is displayed, the CNAME record has taken effect. A typical command output is shown in the following figure.
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Cache Preheating and Refreshing Show

Preheating

Cache preheating
After you submit a cache preheating request, the origin server proactively sends the most current content to a CDN node to be cached. If a user requests the content, the CDN node immediately returns the cached content. It does not need to retrieve any new content.

Typical Scenarios
Initial access: When you connect a domain name to CDN for the first time, you can preheat large files including videos to improve user experience.
Installation package release: Before releasing a software installation package or upgrade package, you can preheat the content to the globally distributed CDN nodes. After the software or upgrade is launched, the CDN nodes directly respond to the download requests of a large number of users, which improves the download speed and greatly reduces the pressure on your origin server.
Promotional activity: Before releasing a promotional campaign, you can preheat the static content involved on the activity page to CDN nodes. After the activity starts, the CDN nodes respond to user requests for accessing all static content, which ensures service availability and improves user experience.

Refreshing

Cache refreshing
After you submit a cache refreshing request, cached content on CDN nodes will be forcibly expired. If a user requests that content, CDN will have to retrieve fresh content from the origin server and then cache that new content.

Typical Scenarios
New content release: After new content overwrites old content with the same name on origin servers, to enable all users to access the latest content, you can submit requests to refresh corresponding URLs or directories of the content, forcing the cached content on the nodes to expire.
Non-compliant content clearing: When non-compliant content is detected and deleted from origin servers, the cached content on nodes can still be accessed. You can refresh URLs to delete the cached content.

Chinese Mainland

Node Distribution in the Chinese Mainland

Beijing, Tianjin, Hebei, Shanxi, Inner Mongolia, Shandong, Jiangsu, Anhui, Zhejiang, Fujian, Shanghai, Jiangxi, Hubei, Hunan, Henan, Guangdong, Guangxi, Hainan, Sichuan, Yunnan, Guizhou, Tibet, Chongqing, Ningxia, Xinjiang, Qinghai, Shaanxi, Gansu, Liaoning, Jilin, and Heilongjiang

Outside Chinese Mainland

Node Distribution Outside the Chinese Mainland (Divided Based on Huawei's Internal Businesses)

Asia

Hong Kong (China), Macao (China), Taiwan (China), Japan, South Korea, Vietnam, India, Indonesia, Thailand, Philippines, Singapore, Malaysia, Cambodia, Laos, Kyrgyzstan, Brunei, Myanmar, Nepal, Bangladesh, Mongolia, Sri Lanka, Kazakhstan, Georgia, Armenia, Uzbekistan, Cyprus, and Azerbaijan
Europe

United Kingdom, Germany, France, Netherlands, Spain, Italy, Ireland, Sweden, Belgium, Austria, Poland, Romania, Belarus, Portugal, Türkiye, Moldova, Bulgaria, Latvia, Switzerland, Czech Republic, Hungary, Luxembourg, and Greece
Oceania

Australia, New Zealand, and Fiji
Middle East and Africa

United Arab Emirates, Saudi Arabia, Pakistan, Qatar, Oman, Kuwait, Bahrain, Iraq, South Africa, Egypt, Kenya, Tanzania, Madagascar, Djibouti, Mauritius, Ghana, Angola, Nigeria, Jordan, Yemen, and Israel
South America

Brazil, Chile, Argentina, Peru, Colombia, and Ecuador
North America

United States, Canada, and Mexico

CDN Acceleration FAQ

Learn More

What Is CDN Acceleration?

CDN is a good option for websites that consist of both dynamic and static content and for sites that involve a large number of ASP, JSP, or PHP requests.
CDN's whole site acceleration accelerates both dynamic and static content. Static content can be served from nearby nodes, whereas dynamic content is retrieved from the origin server through the fastest possible route.
Typically, CDN loads dynamic pages more quickly by bypassing congested routes.
• If you enable whole site acceleration, in addition to the basic cost, requests will be billed ($0.023 USD for 10,000 requests). For details, see Pricing Details.
• You can enable whole site acceleration for a domain name on the Domains page of the CDN console.
What Service Types Does CDN Acceleration Support?

• Website acceleration
CDN is perfect for web portals, e-commerce platforms, information apps, and UGC-focused apps. It can accelerate the delivery of images and small HTML, CSS, and JS files.
• File download acceleration
CDN is suitable for websites, game clients, and app stores that provide file download services, and download tools. It is used in scenarios such as downloading game installation packages and application packages, and updating the ROM on mobile phones.
• On-demand service acceleration
For customers providing on-demand audiovisual services, CDN is a must. On-demand services include online education, video sharing, music or video on demand, and other audiovisual content.
• Whole site acceleration
CDN is a good option for websites that consist of both dynamic and static content and for sites that involve a large number of ASP, JSP, or PHP requests.
Does CDN Acceleration Have a Speed Limit?

No.
There is no default speed limit for acceleration domain names.
What Origin Types Does CDN Acceleration Support?

CDN acceleration supports the following origin types: origin IP addresses, origin domain names, and object storage bucket domain names. An origin server can be deployed on Huawei Cloud, other cloud service providers, or Internet Data Centers (IDCs) , and there is no requirement on the location of the origin server. For details about how to access CDN, see Adding a Domain Name.
If you use an object storage bucket of a non-Huawei Cloud service provider as the origin server, configure the origin server on the CDN console by referring to How Do I Configure an Origin Server When It Is a Non-Huawei Cloud Object Storage Bucket?
Does CDN Acceleration Support Acceleration for a Single Web Page?

Yes.
If you want to accelerate some resources on a website, you can set an independent domain name for the website resources to be accelerated and then configure CDN acceleration.
Does CDN Acceleration Support POST Requests?

No.
POST requests are dynamic interaction requests. If you have only configured website acceleration, download acceleration, or on-demand service acceleration, CDN does not accelerate these requests.
If your website contains a lot of dynamic content, you can configure whole site acceleration. Whole site acceleration accelerates both dynamic and static content. Static content can be served from nearby nodes, whereas dynamic content is retrieved from the origin server through the fastest possible route.
Will User Access from Other Regions Be Accelerated If I Select Chinese Mainland or Global (Chinese Mainland Not Included) as My Service Area?

• If you select Chinese mainland, users outside the Chinese mainland can also access CDN nodes in the Chinese mainland. However, due to cross-border network conditions, the acceleration will not be as noticeable as it is for access from within the Chinese mainland. In the worst-case scenario, your domain name may become inaccessible.
• If you select Global (Chinese mainland not included), users in the Chinese mainland can also access CDN nodes outside the Chinese mainland. However, due to cross-border network conditions, the acceleration will not be as noticeable as it is for access from within the Chinese mainland. In the worst-case scenario, your domain name may become inaccessible.
Is the CDN Acceleration Service Area Related to the Origin Server Location and ICP Filing?

• CDN service area and origin location
The service area of a domain name has nothing to do with the origin location.
• CDN service area and ICP filing
Whether a domain name needs to be licensed does not depend on the region of the domain name provider or the area where the website server is located. All that matters is the service area of your domain name. If the service area includes the Chinese mainland, the domain name must be licensed by the MIIT before being added as an acceleration domain name.
If your service area is Global (Chinese mainland not included), ICP filing is not required.
What If the ICP License of My Acceleration Domain Name Expires?

Impacts
• If you obtain a new license before the original one expires, your CDN service will not be affected.
• If a license has expired and you have not obtained a new license, CDN bans the domain name and the acceleration service for it.
Solutions
Apply to the Ministry of Industry and Information Technology (MIIT) for a new license.
1. Have your domain name reviewed.
2. After your domain name has reviewed, you can enable CDN for the domain name. You can apply to review the domain name on the CDN console. For details, see Reviewing a Domain Name.
Do I Need to Register My Domain Name with Huawei Cloud Before Using CDN Acceleration?

If your domain name has an ICP license number, then you can directly use CDN.

CDN Acceleration Resources and Tools

CDN Acceleration Tutorial Videos

Purchasing CDN Acceleration Service