Tag: CDN

What objective does Anycast DNS serve?

What is the aim of Anycast DNS?

Anycast DNS is an extra service that you can find from DNS providers. It is a helpful traffic-routing system that delivers website material very quickly. That is made feasible by the multiple nameservers that keep a specific similar IP address.

Each of these servers is positioned in a different location to be closer to the possible users. The user experience is enhanced, and DNS query replies are significantly quicker as a result. The closest and most accessible server will fulfill the user’s request. As a result, your customers won’t have to wait long to access and browse your website thanks to the Anycast DNS service, which almost eliminates latency.

How does it operate?

A device that is connected to the Internet communicates with a server by using its IP address. The most basic kind of communication is one-on-one interaction. It’s alright, and there’s a possibility that DNS resolution will function. However, if only one server has the required information, individual requests will have to travel quite far to reach it (A or AAAA record). The user won’t receive the desired response if the server is down. There won’t be a response to the query.

Advantages of implementing Anycast DNS

  • Improved uptime A server could crash, but there is a very slim probability that several servers would crash simultaneously. Therefore, your website will have enhanced uptime and be accessible at all times to your users.
  • Quicker reaction time. The waiting period is significantly reduced when your servers respond quickly. Few potential customers will leave your website.
  • Position in search results. The user experience includes things like loading times and response times. Search engines do not ignore these variables when determining how to rank your website.
  • Increased safety. If one of them is compromised, you can rely on other servers.

Is Anycast DNS appropriate for CDN (Content Delivery Network) use?

Yes, Anycast DNS is ideal for CDNs because it responds faster to queries and can route traffic to a local webserver.

Consider this network: you have visitors from three continents: North America, Asia, and Europe. You have made three copies of your website (3 web servers with 3 different IP addresses). You’ve set up Anycast DNS servers on each continent, so all traffic in North America goes to the webserver there, traffic in Asia goes to the Asian server, and so on for Europe.

Due to two factors, the CDN will significantly reduce latency. First, the Anycast DNS servers that are closer to the customers will be the first. They will both be in the same country and on the same continent. It won’t take long to resolve the domain.

The numerous copies of the site make up the CDN’s second component. You can divert visitors to a nearby web hosting and respond to domain name queries more quickly.

The two work well together to give your users a wonderful experience. In addition, they will encounter a lot less latency than if the nameservers and web servers were located on a different continent.

Conclusion

What do you currently think about Anycast DNS? It undoubtedly has benefits and can significantly increase network performance. Additionally, it is practical for scaling and simple to set up. Definitely, a tech you need to look at!

How to create a CDN?

Speed, speed, speed! We all want our sites and applications to load as fast as possible. Each moment of delay might make your visitors go away. So one of the most common approaches to increase the speed of a website is to use a Content delivery network (CDN). But how to create a CDN? 

What is CDN?

Why is CDN important?

The content delivery network is what the CDN abbreviation is. It is a complex solution that focuses on delivering content to visitors faster by using routing and cache methods. 

There are DNS servers that server that will check the origin of the request and redirect to the closest cache server shortening the length and time of each request. 

How does CDN work? 

The idea is simple, there are DNS resolvers on the way that analyze the DNS request, and based on the origin of the request, they will provide the IP address of the closest cache server (called delivery nodes by some service providers). 

Those DNS servers are strategically located. Depending on your DNS provider, you can have many and put more in your most important region. 

Instead of having Anycast DNS, where all of the DNS servers have the same IP address, here you can use a service called GeoDNS or Traffic Director (depending on your provider) and set different IP addresses for the different regions. 

That way, you won’t send all of the traffic to the same origin. You can have a second or third web hosting located in those important places for you. 

You will use those servers as cache servers, and you will put their IP addresses for the DNS server nearby. 

That way, the DNS request will go very fast to the first DNS resolver that can provide an answer, and after that, it will redirect to the cache server and saves a ton of time. 

How to create CDN?

  1. Choose a CDN provider or check a combination between GeoDNS and web hosting. 

You can go straight to the big could like MS Azure or Amazon’s AWS and get a CDN from them. It will probably work fine, but it could be a lot more expensive. 

Another option is to get a Managed DNS service and a few web hosting services at the locations that best suits you. That will save some money, and you can be less dependent on a single provider. 

  1. Set up your web hosting servers. 

No matter which option you have chosen, you will need to decide where you want to have your data. Make it closer to your users so they can load your content fast. 

You will need to get the IP addresses of the servers you have chosen and later use them with your DNS settings. 

In your DNS, you will need to create a DNS load balancer. You must choose points of presence, where you will have a DNS server with DNS records. You will need to add the appropriate DNS records, use the server from before, and redirect the traffic to the closest server. 

Most of the CDN DNS providers will have so-called Pull Zones. A pull zone will be your cache where images, CSS, and JavaScript will be saved automatically. You can create one and go to the next step. 

  1. WordPress settings for the cache plugin

Now that you have set up your CDN, you need to adjust your WordPress site. Use a cache plugin. In it, you need to enable page cache, stop minifying, enable database cache, stop object cache, enable browser cache. And the last step is the most important, enable CDN and choose the CDN type.   

Conclusion

It is not really hard to create a CDN. Based on your provider, you will have different steps, but the basic idea is the same. Create one and enjoy the benefits.