The impact of CDN on SEO, will there be an impact on SEO using CDN?

For large visits, CDN can significantly increase network coverage and reduce the pressure on the source server, but there are not many powerful CDN operators, so it is recommended to find a larger powerful operator such as Rabbit CDN

Everyone should be familiar with seo, but we still have a few words, to do some popular science for friends who don't understand, we generally say seo is the index optimization of search engines, but in China, usually when it comes to search engines, we are generally default, after all, it is the largest search engine in China, and the speed of seeing is the best way to see the inclusion of domain names, in fact, it is simple to say, it is to optimize the ranking of domain names, the weight of your domain name is high, and the probability of others searching for you is naturally high. Like now, the front-row ads are all bidding, anonymous bidding, and only those with high prices can get a short period of time to push the first page of the index, and in the past, they may only rely on medical advertising to make money, but now everyone's dependence on the network is gradually increasing, and the significance of weight is getting bigger and bigger, which naturally has created the rise of the SEO industry.

Now let's return to the topic, if you use CDN, will it affect your SEO ranking?

I don't think so, first of all, the core concept of CDN is beneficial to SEO, because CDN is to do content distribution cache, the purpose of this is to allow the user's station to be opened faster, at the same time, like spiders, Google spiders, etc., when they crawl **, they will also visit like normal users, faster access, more conducive to spider crawling data, in other words, spiders will be more willing to crawl easier to access sites, if a station its access speed is very slow, At the same time, other people's stations are more likely to be crawled by spiders, and the slow stations will be less included, which is inevitable. This is analyzed in principle. So let's take a look at what situation your site SEO will be affected, unless there is a situation, that is, your DNS server is very garbage, when docking CDN, there is a long unresolved state, this situation generally does not happen, the slowest TTL, now can also be guaranteed to take effect within 30 minutes, and DNS** is not expensive, the average person can afford it, there is also a situation where you frequently change your resolution, one will parse this, one will parse that, This situation will inevitably have an impact on SEO, because there is no way for the spider pool to crawl to your content, and your domain name is not resolved, which means that the indexing optimization during that period is vacuumed and wasted.

Another point to remind everyone is that when using CDN, you must remember to update the cache content, if you set the cache time for too long, then the update of your site will be very slow, because the cache capacity of CDN is very strong, you must remember the number of Sen to live this point, when updating the content, you must see if the cache is updated, and if it is not updated, you must contact the service provider to help you update the cache content.

Speaking of which, everyone should have the answer, CDN is helpful for SEO and will not affect SEO.

The impact of CDN acceleration on **SEO is beneficial, and the following are some of the points put forward by Shanghai Xianfeng Network for common reference only.

1. What is the impact of starting CDN on **?

After starting CDN, due to the caching mechanism, the content updated in real time may not be pushed to the CDN server at the first time, and the content seen by all spiders has not been updated. So from the perspective of content update, this point is contrary to the traditional SEO concept of laughter.

2. Why do you want to start CDN?

I think the purpose of starting CDN should be to reduce the burden of the server, speed up the loading speed of the web page, especially in the case of the network speed and bandwidth can not be improved, the best acceleration program, from this dimension to understand, at this time the idea of the search engine is one, the spider also wants to crawl the content faster, speed up the loading speed of the ** This is conducive to SEO, there is no doubt about it. Messy and messy.

3. In terms of the second point, if the content of ** can be pushed to the CDN server in real time, this will not solve the confusion of the second point, in the final analysis, it is the setting of the CDN server server, and the correct setting of the CDN server is the key. The cache time of some general ** resources and infrequently used files can be longer, and the cache time should be reduced for some short-term updated files, and the newly updated content will be pushed to the CDN server as soon as possible.

Once the number of visits goes up, starting CDN can greatly improve the user experience, as long as it is triggered from the perspective of improving the user experience, which is consistent with the direction of search engine optimization. I think setting the CDN correctly is beneficial for ** who have CDN needs.

CDN acceleration can be simply understood as network distribution, which disperses traffic to access concurrent or non-concurrent requests and reduces requests from the origin server.

It can be understood in this way, if there is no CDN, the user accesses, it will directly request to your source server space, at this time you are a source IP response to n user requests, if the traffic is large, affected by bandwidth and other reasons, you will become very stuck, if the CDN is applied, it is equivalent to copying your **content distribution to the node server, such as 30 nodes of CDN, then the user accesses at this time, and will get the response of the node server in the principle of proximity, Of course, combined with the CDN caching strategy, some of the data that is not available will be returned to the source request, at this time, the access speed will be greatly improved, and only 30% of the response needs to be fed back by your origin server, the response pressure is greatly reduced, and the stability is better.

There is no negative impact on ** optimization, now the search engine will not misjudge the IP change for the change of CDN node, and the improvement of access speed on the whole has a positive impact on the user experience, which is more conducive to optimization in general, especially CDN.

I don't think the use of CDN acceleration has any impact on optimization, because the crawling content doesn't care which server it comes from, but more about the architectural logic, content originality, and whether it can give better value to search engine users when searching for such keywords. In addition, CDN improves the loading speed and user experience, but it is smoother when the user really flows the content, so as to avoid the loss of users due to slow access speed.

"CDN has a common Chinese name network content sharing acceleration system".

CDN "Although it is a little professional, none of this CDN dedicates intimate services to netizens. The full name of "CDN" is an acronym for ContentDeliveryNetwork, and the most appropriate literal translation of Chinese should certainly be the content delivery network. But this name doesn't actually reflect the function of CDN!

If it is expressed in Chinese in the vernacular, it is better to call it a network content sharing acceleration system."

1. The basic principle of CDN's network tension content acceleration;

The CDN system has at least two functions, one is to improve the Internet browsing speed experience for customers' Internet users. Another role can be to offload the access pressure on the server side.

Figure: The flow of information on the Internet in the first place.

CDN is a content distribution network built on the network, relying on edge servers deployed in various places, through the load balancing, content distribution, scheduling and other functional modules of the central platform, so that users can obtain the content they need nearby, reduce network congestion, and improve user access response speed and hit rate. The key technologies of CDN mainly include content storage and distribution technology.

As long as one of the ABC trio initiates access to the corresponding server content in the graph, then everyone next to the same CDN can directly serve from the nearest CDN.

While the principle of CDN is extremely simple, the real-world implementation is extremely complex. The most well-known system is Squid, and then there are Nginx, Haproxy, and so on. And in the author's use, it is still apachetrafficserver that is the most efficient!

Second, the effect and implementation method of CDN;

CDN is a core technology in the online world. In the online world, if we don't have CDN technology to provide services for us, it is estimated that our Internet + will not have such a good experience, and of course there will not be so many little girls and ladies chasing dramas, and of course there will not be so many people starting their Internet entrepreneurship! Perhaps we can say with a little bit of confusion

CDN technology is driving China's Internet" and has achieved China's largest railway 12306 China high-speed rail ticketing network. Of course, the hidden CDN technology has also made a lot of games and broken the eyes of many children!

Figure: Diversified CDN solutions in the industry.

The basic idea of CDN was very simple, it was nothing more than sending online content to people who had used it to people who had the same needs.

The core idea of CDN is actually the embodiment of a distributed service programming idea, and there is also the philosophical idea of "everyone for me, I for everyone". I think that at the beginning, when the 12306 online ticketing system was online in the first year, it was often down, and the reason was that there were many people in China, and the hardware system of the background server was too poor, so we couldn't help but let people buy tickets!

CDN technology actually distributes the work tasks of one server to a batch of servers. To be continued.

The full name of CDN is Content Delivery Network. CDN is an intelligent virtual network built on the basis of the existing network, relying on edge servers deployed in various places, through the load balancing, content distribution, scheduling and other functional modules of the central platform, so that users can obtain the content they need nearby, reduce network congestion, and improve user access response speed and hit rate. The key technologies of CDN mainly include node scheduling, node load balancing, and content storage, distribution, and management technologies.

Before CDN acceleration:

Before using CDN acceleration, the request initiated by the user's side is recursed to the **DNS resolution through the user's DNS, and the end-user side directly requests the **server. Here are a few things that can happen:

1. The load on the central server is too high, because all requests initiated by the client will be requested to the server.

2. The latency of obtaining content from end users is high, for example, the server is in Beijing and the user is in Guangzhou.

3. Poor service stability.

After CDN acceleration:

CDN adds a new layer of cache nodes in the existing network to publish the resources of the origin server to the network node closest to the user's slippery silver, so that the client can directly access the nearest CDN node and hit the resource when requesting, reducing the back-to-origin situation and improving the access speed.

Professional technical strength. If you have a good node, you also need to look at the scheduling strategy, DNS scheduling capabilities, and back-to-origin performance.

For the person in charge, the use of CDN can not only achieve the best acceleration, but also save the bandwidth of the backbone network and reduce the bandwidth demand; Defend against malicious attacks, etc., since there are so many benefits of CDN, follow Xiaoyun to understand the basic principles and functions of CDN and what are the benefits to **?

The basic principles of CDN.

CDN is mainly implemented by taking over DNS, adding a cache layer between the user and the server, and directing the user's request to the cache to obtain the data of the source server, so that the user can obtain the required content nearby.

Therefore, CDN technology is used to solve the situation of Internet network congestion, improve the response speed and success rate of user access, and can also handle 70% and 95% of the content access mode of the entire page, reduce the pressure on the server, and improve the performance and scalability of the Internet, so as to ensure the customer's browsing experience and avoid the loss of customers.

CDN features.

1) Save backbone network bandwidth and reduce bandwidth demand;

2) Provide server-side acceleration to solve the problem of server overload caused by large user access;

3) The service provider can use the webcache technology to cache the web pages and objects visited by the user locally, so that the access of the same object does not need to occupy the egress bandwidth of the backbone, and the demand for the corresponding time for the user to access the Internet page is improved;

4) It can overcome the problem of uneven distribution, and can reduce its own construction and maintenance costs;

5) Reduce the impact of "communication storm" and improve the stability of network access.

CDN benefits for **.

1.Improve the user experience.

CDN's key technologies of "content distribution", "content exchange" and "performance management" are intuitively reflected in the best user experience. CDN can save the cloud server configuration, independent bandwidth, north and south double line three of the three best loading speed problems, CDN speed performance is the biggest feature of speed balance, sharing cloud server resource pressure, cross-region and cross-operator experience gap reduction and other advantages.

2.Improve the stability and security protection capabilities of **.

CDN ensures that content can be accessed under high-stress conditions such as high user traffic, intermittent spikes, and potential server failures. CDN's content distribution mechanism effectively relieves the pressure on the server, and the traffic growth will not lead to a decrease in browsing experience.

Strengthen security protection.

CDN nodes are scattered, attacking a node only affects the cache access of a node, and the CDN's "content routing" once Yuyou will automatically enable another node, if the number of CDN service nodes is enough, then the traffic package required by the attacker will increase geometrically, and the attack cost will increase. With CDN, strengthen the security protection.