On August 19, in the third live broadcast of the National Acceleration Festival, Alibaba Cloud CDN solution architect Tuozhou shared the theme of "The Practice of Site-wide Acceleration in the Media Service Industry", focusing on the characteristics and pain points of the Internet media service industry. Introduce the application practice of Alibaba Cloud's site-wide acceleration products.
Characteristics of Internet Media Services
Internet media service platforms generally include the uploading, sharing, and dissemination of massive amounts of graphics, text, audio and video files, and have the characteristics of a large number of users, a wide distribution of users, high real-time requirements, and hot spots.
The first is the wide range of content dissemination and high requirements for CDN node coverage; the second is real-time, the platform is very concerned about the real-time of file uploading and distribution, and it has higher requirements for CDN response efficiency; the third is sudden, the platform is general There are hotspots and the surge in traffic caused by activities, high requirements for bandwidth and other response resources, and certain requirements for the resource reserve and flexibility of CDN; the fourth is the high complexity of the business, because the media service platform covers a wide range and users The group is very diverse, and the network environment of different users is uneven, which leads to higher requirements for the platform to optimize network transmission.
Under the above background, the traditional source site single IP access mode cannot meet the business scenarios of high reliability, high efficiency, and large concurrency, and it needs to be solved by DCDN products.
Technical Features of Alibaba Cloud DCDN
Aiming at the pain points of media service platforms, DCDN products can provide solutions in terms of node coverage and stability and efficiency.
First of all, the coverage of DCDN nodes is very wide. There are more than 2,300 nodes in inland China, covering 31 provincial-level regions, and a large number of nodes are located in first-tier cities such as provincial capitals, that is, areas with relatively good network environment and quality. In addition, it has more than 500 nodes overseas, covering more than 70 countries and regions.
Secondly, DCDN products are very stable and efficient. Based on sufficient nodes and bandwidth guarantees, they support billions of QPS concurrency and can provide stable acceleration services; they have an advanced distributed system architecture that can achieve load balancing across the network and ensure the availability of nodes ; Optimized transmission protocol, can support HTTP/2 efficient transmission protocol, can realize fast and stable data transmission; In addition, DCDN has the ability of precise caching, high-speed caching, high-speed reading and writing, efficient back-to-source and intelligent scheduling, which is fully guaranteed The effect is stable.
Case application of DCDN in the game industry
1. Uploading video and picture files to the origin site to accelerate
The first case is how to speed up the upload of files from media customers to the origin site. Generally, the business scenarios of media platforms are divided into file production uploading and file distribution. In the file uploading scenario, the network environment requirements are relatively high, which will be affected by relatively uncontrollable factors such as fluctuations in the public network and long-transfer jitter, resulting in slow speed , The low transmission success rate and other related issues.
After a customer uploads using Alibaba Cloud DCDN, the upload efficiency can be increased by more than 50%. At the same time, DCDN supports the upload of files up to 2G. As shown in the figure below, a comparison of the upload rate of a customer's uploading files through DCDN acceleration and those without DCDN acceleration. The upload rate in the blue part of the figure has increased by more than 60%, reaching more than 1500kb/s, while the green upload rate without DCDN acceleration falls within the range of 300~500 and 500~1000kb. Therefore, DCDN has a very obvious effect on the upload rate and user experience improvement.
2. Increased request success rate under user distribution and complex network environment
When the user distribution and network environment are more complicated, the failure rate of user requests is relatively high. As shown in the figure below, the statistics of the number of user request failures seen by a customer's source site, before the DCDN acceleration, the number of request failures fell more in the 15-20 interval, after the DCDN product acceleration, related requests The number of failures can obviously fall to single digits, and the failure rate of related user requests is reduced by more than 80%. The main source of revenue is the intelligent routing function of DCDN products, which will detect the optimal link environment of the current network in real time. Giving the best path guarantee when the user requests it can improve the stability of the DCDN internal link and guarantee the success rate of the request.
3. Major events, over 10 million concurrent requests
When the media service platform has hot spots and major events, the load capacity of the origin site is not enough to support such a large event, and the smooth progress of the event may not be guaranteed. At this time, you can access the Alibaba Cloud DCDN product to realize the caching of static files through the separation of dynamics and statics, which can greatly reduce the load capacity of some origin sites, and the dynamic return to the source part also supports the return via HTTP/2 protocol. Source, can reduce the load number of the source station link, improve the link reuse rate, and can solve the problem of insufficient load capacity of the source station. With sufficient redundant resources of DCDN, major events can be perfectly undertaken.
More DCDN applications
There are many extended applications of DCDN products, mainly introducing 4 aspects.
First, DCDN supports IP application acceleration , which is an acceleration at the level of non-standard HTTP protocol users. It is applied to the scenario of the cell protocol service of layer 4. When some services are in the process of accelerating, the application level can be ignored, and no application level processing is required, but only network acceleration is performed, and IP application acceleration can be selected.
Second, the DCDN product supports the websocket protocol , which establishes full-duplex communication between the user and the CDN node and the CDN node to the source site, which can maintain a long-term link, so that the user does not need to initiate a request for the second time Establishing the link again can improve the user experience of the user.
Third, DCDN supports automatic switching of the source station. Usually, the source station has two original stations, active and standby. When the main source station has response and availability problems, DCDN real-time detection will find the abnormal situation in time, and the original station with the problem After culling, the request will visit the alternate source station, which can guarantee the stability of the user level to the greatest extent.
Fourth, DCDN supports IPv6 access . IPv6 currently covers the three major operators. In addition, Ali's DCDN products have more related applications that can be explored. For details, please log on to the official website to learn more about the product details.