Solve the problem of cross-sea high concurrency crash? so easy

In recent years, with the strong development of the Internet, more and more companies choose to go overseas to expand overseas markets. If you want to attract users in an unfamiliar market as quickly as possible, you must have a variety of activities. However, while the activity brings a lot of traffic, it also brings some problems, such as the following situations:

• After the seckill event is started, the event page crashes
• Time-limited snap-up activity, the user clicks the snap-up button and there is no response
• During the game activity, the user cannot log in
• During the event, the user's payment failed

These activities can easily attract a very large number of users, pouring into the same app or page at the same time. This makes the number of concurrent requests to the server surge in a short period of time, which can easily cause the server to crash. It was only after I understood this that I came to know the real reason why I failed to participate in the Lightning Deals every year.

What is high concurrency

Before understanding high concurrency, we must first know what the number of concurrency is? Concurrency refers to the number of requests that the system can handle at the same time, which is also one of the indices that reflects the load capacity of the system.

High concurrency refers to a large number of user requests to access the server at the same time point. These requests are actually updates to modify database data. Usually, after receiving a request, update will lock the table and wait for one request to complete before processing the next request. If the cumulative number of client requests exceeds the database connection limit, the server will return a connection timeout. Too many requests at the same time will also cause the same piece of data to be added twice, and data consistency cannot be guaranteed.

For cross-border business, it is difficult to optimize the performance of availability and fault tolerance for high concurrency because of the different network environments, development levels, operation modes, and congestion levels in the world. However, if the cross-border business wants to expand, it is inevitable to face the situation of website promotion, concurrent activities, and temporary traffic bursts. If you cannot intelligently regulate and allocate bandwidth, it will put too much pressure on the service load, which will affect network connectivity and lead to loss of users.

At the same time, compared with domestic ones, the probability of cross-border business facing malicious attacks has skyrocketed. For example, DDoS attacks are one of them. In fact, DDoS is another form of high concurrency. In the face of this vicious behavior, if the independent server and bandwidth do not have a certain anti-attack capability, it may cause a large number of user losses.

Taking into account the cost and time issues, access to cloud service providers has become the best choice.

Another shot of cloud overseas acceleration

It also shoots cloud services that integrate distributed architecture, large bandwidth load balancing gateways, and OpenStack virtualized cloud processing to create high-performance services that integrate loose coupling, elastic expansion, and centralized resource pooling.

Availability

You Paiyun is responsible for huge data and has rich experience in handling large traffic requests, which can ensure stable and reliable high-availability services.

Alsopaiyun adopts the distributed network architecture of edge computing. The global Anycast network covers 90 countries and more than 200 cities, allowing client data to preferentially select the nearest node for analysis, processing and storage, eliminating the delay and delay of cross-operator access. pause to ensure stable and smooth data transmission.

At the same time, the edge node completes some processing, which can also reduce the pressure of centralized processing in the data center, further reduce the occurrence of excessive access and the like, and ensure stable and available services. Combined with the segment cache preloading function, it can effectively reduce the bandwidth pressure of the origin site and avoid the origin site crash caused by a large number of sudden requests.

The cloud overseas acceleration service also supports the latest web standards such as TLS 1.3, HTTP/2 and AMP, and allows the deployment of custom JavaScript, relying on a distributed network architecture to quickly synchronize updates to global nodes.

fault tolerance

In response to the high concurrency performance requirements of gateways and data gateways for cross-border business, Paiyun has carried out targeted gateway transformation with large traffic and large concurrency.

At the same time, for high-burst concurrent requests, the system samples data every 5 minutes and schedules it automatically based on real-time data. Once a server has a hardware failure, it will automatically identify and remove the cluster, so as to ensure that the server cluster is deployed with load balancing and does not affect the actual access of users every time.

In addition, considering the possible problems of the user's source site, Paiyun Overseas Accelerator provides a corresponding disaster recovery mechanism, which supports users to independently set the master-standby relationship and their respective polling weights for multiple source site addresses, further reducing the failure problems caused by high concurrency.

safety

In the process of overseas business development, various malicious attacks are often faced. For example, a DDoS attack means that the attacker sends as many network access requests as possible to the user origin site, forming a traffic torrent to impact the origin site system.

In response to attacks, Paiyun Overseas Accelerator has strong traffic attack protection capabilities. In addition to T-level network-wide traffic scheduling and cleaning, it also supports TCP, UDP, HTTP/HTTP/HTTPS and other protocols, which can protect against SYN Flood, ACK Flood, UDP flood, CC and other types of attacks.

Based on years of experience in website operation, maintenance and protection, Paiyun Overseas has also accelerated the provision of targeted protection measures to protect the security of the origin site and normal access to services:

• And Paiyun CDN network can hide the source site address, prevent the origin site from being directly attacked by DDoS traffic, and ensure normal access to the origin site;
• And Paiyun security protection has deployed a number of high-defense servers, which have strong anti-attack, anti-interference, and good security performance, helping websites directly reject DDoS attacks;
• The scheduling platform pulls the attack traffic to the nearest cleaning node for cleaning, and returns the cleaned traffic to the server to ensure normal traffic access.

The unique distributed network architecture also ensures that the new rules can be synchronized globally within 30s, and try to update the proprietary defense rules for each attack, further reducing site crashes caused by attacks and ensuring smooth access for normal users.

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