Service and Support

Now is the Internet era, and the application of the network has penetrated into everyone’s daily life. People can quickly access various shopping, video websites, and game applications through computers or smartphones. To access a website or application, it is necessary to download the packet content from the IP address of the target server to the local device. However, in daily life, people only enter a domain name in the browser or open the APP application during the online process, and no IP address is entered during the process. Why is this? In fact, there is a name in the middle that silently provides services but is not well known to everyone. It is the domain name resolution system, also known as the DNS resolution system, which completes the entire scheduling process of converting domain names into corresponding server IP addresses for query requests. The DNS resolution system plays a…

In total station acceleration, intelligent scheduling is one of the important technologies for achieving CDN network acceleration. The purpose of this technology is to gather users in the same network environment into the same service group, and allocate the optimal service node based on the network and capacity of the CDN server. Simply put, the whole station accelerated intelligent scheduling is to provide users with the most suitable CDN node to access and obtain network services nearby. There are generally two methods of intelligent scheduling: DNS scheduling and central scheduling. DNS Scheduling Mainly based on Local DNS, it is used for scheduling across regions and operators, with high scalability and good performance. It is generally used in full-site acceleration scenarios such as web pages; This scheduling method relies on DNS recursive resolution, passing CNAME to the GLSB of the CDN, and then allocating adaptive nodes based on the geographical location…

The goal of URL statization is to be more friendly to search engines and users. Although Google has previously published a blog post on its official blog that allows it to capture dynamic pages well, and also strongly encourages websites to adopt the form of dynamic pages to build websites, what we need to do is not only to face Google, but also to enable other search engines to capture them well, while making users feel better, Therefore, it is still recommended to adopt the form of static web pages for website building, while in fact, static web pages are relatively easy to achieve good rankings. To understand this issue, we must first understand several basic concepts; 1、 What is the URL? URL is a unified resource locator, a concise representation of the location and access method of resources that can be obtained from the Internet. It is the address…

CDN selects the optimal node to provide accelerated services to end users through scheduling, which is particularly important. In practical applications, four types of scheduling are commonly used, namely, DNS scheduling, HttpDNS, Edge 302 scheduling, and Center 302 scheduling. The following is a detailed introduction to the four scheduling types: 1. DNS Scheduling Intelligent computing, providing services to netizens at the nearest best node. 2. HttpDNS Scheduling The client directly invokes the HttpDNS interface to obtain the cache server IP group, and then selectively sends requests to the cache servers in the IP group, replacing the conventional DNS scheduling policy. This is applicable to the client, and the client needs to modify slightly to make the HttpDNS interface call. 3. Edge 302 Scheduling For resolution errors caused by user LocalDNS configuration errors, the cache server can determine based on the terminal IP and respond to the terminal’s optimal cache server…

1、 What is Refresh? Refresh refers to eliminating old files on a cdn node and retrieving a new version of the file. 2、 What is preheat? The first published file is actively pushed from the source site to the CDN, allowing users to access the CDN without having to hit the customer’s source site. 3、 Why refresh? The resources cached on the CDN node have not expired, but based on the customer’s business requirements, the cache resources on the CDN node need to be updated. When encountering this scenario, the refresh function is launched, which forcibly deletes the cached content of the CDN node. When a user requests these resources, the CDN node needs to pull resources back to the source to ensure that the responding resources are consistent with the source station. Common scenarios: For example, after the game package of Company A is released, it is found that…

CDN mainly improves site speed and performance by caching content at edge nodes to shorten the distance between users and websites. Some content, when you do not want to be stolen from other places, such as some content that has copyright or does not want to generate more traffic due to theft, is the core issue that most content owners consider. This is known as the security chain. In practice, the commonly used anti-theft chain methods for CDN include IP black-and-white list, referer, timestamp, and central authentication for anti-theft chain. Below is a brief introduction to these methods of anti-theft chains: 1、 IP black and white list This is relatively simple. Directly configure the requester’s IP black and white list. After setting the blacklist, all users except the blacklist can access it; Conversely, if a whitelist is set, only users on the whitelist can access it. This method is directly…

Server Load Balancing (SLB) refers to a network service device that we use to distribute traffic to multiple cloud servers. It can quickly improve the external service capability of the application system through traffic distribution; Hide the actual service port to enhance the security of the internal system; Improve the reliability of application systems by eliminating single points of service failure. The load balancing service virtualizes multiple cloud server resources located in the same region into a high-performance and highly available application service pool by setting a virtual service address (VIP); Distribute network requests from clients to the cloud server pool according to the method specified by the application. The load balancing service checks the health status of cloud server instances in the cloud server pool and automatically isolates instances with abnormal status, thereby solving single point problems with cloud servers and improving the overall service capability of the application….

Lock is a mechanism for computers to coordinate multiple processes or threads to concurrently access a certain resource. It is a key feature that distinguishes database systems from file systems. It can ensure that users can read and modify data in a consistent manner. In databases, in addition to traditional contention for computing resources (CPU, RAM, and I/O), data is also a resource shared by many users. How to ensure the consistency and effectiveness of data concurrent access is a problem that must be solved in the existing database. Lock conflict is also an important factor that affects the performance of database concurrent access. From this perspective, locks are particularly important and more complex for databases. Preventing update loss cannot be solved solely by the database transaction controller, but requires the application to apply necessary locks to the data to be updated. MySQL uses many such locking mechanisms, such as…

Driven by markets such as video, e-commerce, and games, CDN has become an indispensable part of China’s Internet infrastructure, and the industry has entered a stage of rapid development. With the continuous development and progress of technologies such as artificial intelligence, big data, cloud computing, the Internet of Things, virtual reality, and blockchain, CDN will become an important network platform supporting the implementation and application of these technologies, which will drive the further expansion of the CDN market. At the same time, the 5G era is approaching, and the application of emerging communication technologies will also drive the market’s demand for CDN. China’s CDN industry will enter a new stage of development. In 2022, China’s CDN market will reach 135.86 billion yuan, with broad prospects for development. Moreover, network security is a prerequisite for the development of websites, and frequent network layer DDoS attacks and application layer DDoS attacks occur…

The vast majority of ordinary people have access to reports about content delivery networks (CDNs), almost all due to downtime events at major factories. But what everyone doesn’t know is that downtime isn’t the main reason many companies adopt converged CDNs. In fact, according to market research conducted by well-known foreign media, the most common reasons why customers turn to adopting a converged CDN architecture are to reduce streaming media costs, improve quality of experience (QoE), and create an adaptive infrastructure to address local bandwidth issues. Although almost all large content companies adopt the integrated CDN model, many small and medium-sized companies have not yet turned to content delivery strategies based on integrated CDN. 1、 Most companies tend to choose to integrate CDN Using converged CDNs has become the most popular option in today’s streaming media market. If you have not yet adopted a converged CDN to achieve the benefits…