Getting to Know CDN

This section gives a brief introduction about CDN.

What Is CDN?

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

Huawei Cloud CDN has over 2,000 PoPs in the Chinese mainland and over 800 PoPs outside the Chinese mainland. The network-wide bandwidth reaches 180 Tbit/s. The PoPs are connected to the networks of top carriers in China such as China Telecom, China Unicom, China Mobile, and China Education and Research Network (CERNET), as well as many small- and medium-sized carriers. Up to now, Huawei Cloud CDN covers more than 130 countries and regions, connecting to over 1,600 carrier networks. CDN precisely schedules user requests to the most appropriate PoPs, providing efficient and reliable acceleration.

Huawei Cloud CDN can be used for:

Scenario	Description
Website acceleration	CDN is perfect for web portals, e-commerce platforms, news apps, and user generated content (UGC)-focused apps. It provides excellent acceleration for static content associated with acceleration domain names. In addition, it supports custom cache policies. You can set the cache time to live (TTL) as needed. The files that can be cached include but are not limited to .zip, .exe, .wmv, .gif, .png, .bmp, .wma, .rar, .jpeg, and .jpg.
Download acceleration	CDN is useful for download clients, game clients, app stores, and websites that provide download services based on HTTP or HTTPS. An increasing number of new services need to update software in real time. Conventional download services need to provide even more and larger downloads. If origin servers have to handle all these requests, it places tremendous strain on these servers and results in bottlenecks. CDN can distribute content to PoPs, ease the pressure on origin servers, and speed up downloads.
On-demand service acceleration	If you provide 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. Conventional on-demand audiovisual content puts significant load on the servers and consumes great bandwidth. When this happens, user experience is compromised for low-speed services. CDN ensures fast, reliable, secure acceleration for such services by delivering content to all CDN PoPs. Users are then able to obtain that content from nearby PoPs anywhere and anytime.
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. Whole site acceleration accelerates both dynamic and static content. Static content can be served from nearby PoPs, whereas dynamic content is pulled from the origin server through the fastest possible route. As such, dynamic pages can be loaded more quickly by bypassing congested routes.

Huawei Cloud CDN Billing

You can choose to be billed by traffic or bandwidth. For details, see Price Calculator.

By Traffic
If you choose traffic-based billing:
- You can be billed by the traffic used per hour.
- You can buy a pre-paid CDN traffic package to get more savings. Fee of CDN traffic generated when users request content will be deducted from the traffic package.
By Bandwidth
Billing by bandwidth has three options: by peak bandwidth, by 95th percentile bandwidth, and by daily average peak bandwidth.

Billing by 95th percentile bandwidth and by daily average peak bandwidth are only available for customers who have a budget of more than $15,000 USD for CDN each month. If you are this type of customers, submit a service ticket or contact customer service to apply for it.