{"id":10915,"date":"2022-06-07T18:58:00","date_gmt":"2022-06-07T13:28:00","guid":{"rendered":"https:\/\/opstree.com\/blog\/\/?p=10915"},"modified":"2022-06-14T18:26:42","modified_gmt":"2022-06-14T12:56:42","slug":"amazon-cloudfront","status":"publish","type":"post","link":"https:\/\/opstree.com\/blog\/2022\/06\/07\/amazon-cloudfront\/","title":{"rendered":"Learn everything about Amazon Cloudfront"},"content":{"rendered":"\n

Before going to Cloudfront functionality, we need to understand the CDN (Content delivery network) first, as Cloudfront is nothing but just a FAAS  (functions as a service) platform provided by AWS, which we generally relate to the content delivery network(Cloudfront) in AWS cloud service provider.<\/p>\n\n\n\n

CDN(Content Delivery Network)<\/strong><\/h2>\n\n\n\n

A CDN is kind of a geographically distributed group of servers that are attached so that they can communicate with each other and provide fast delivery of any content such as HTML pages, images, videos, etc. The popularity of CDN services is continuously growing among organizations such as Netflix, Facebook, and Amazon as their major web traffic is served through CDN.<\/p>\n\n\n\n

Now, let’s take a deep understanding of how CDN works in the AWS Cloudfront service.<\/p>\n\n\n\n

We could think of a CDN as an ATM. Having a cash machine on practically every corner makes it fast, immediate access, and efficient to get money. There\u2019s no wait time in long bank lines to get our money in hand.<\/p>\n\n\n\n

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In today’s time, a large portion of all internet content is delivered through CDNs. Here is a simple example:<\/p>\n\n\n\n\n\n\n\n

If we were in New York and wanted to view the website of our favorite store in London that\u2019s hosted on a server in the UK, we would have experienced slow content load times because the request had to travel all the way across the Atlantic Ocean. To resolve this, a CDN would store a cached version of the London website content in multiple geographical locations around the world, also called \u201cpoints of presence<\/strong>\u201d (PoPs). These PoPs contain their own caching servers and are responsible for delivering that content close to where we\u2019re located in New York.<\/p>\n\n\n\n

Content delivered from a server closest to your physical location gives you a faster, high-performance web experience.<\/p>\n\n\n

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What is Cloudfront<\/strong>?<\/h3>\n\n\n\n

Amazon Cloudfront is a web service that gives business and web application developers an easy and cost-effective way to distribute content with low latency and high data transfer speed. <\/p>\n\n\n\n

What does latency mean?<\/strong><\/h3>\n\n\n\n

What does latency mean let’s understand with this given picture?                                        <\/p>\n\n\n\n

For User1<\/strong> the total travel period is 4s and in the other scenario, for User2<\/strong> the travel time is 2s so generally what we choose, we always go for the low latency(2s) time. In our day-to-day routines, we use the services on the internet like Wikipedia, youtube, or websites where we can search for images, videos, etc. backed up by CDN.<\/p>\n\n\n\n

To deliver content to end users with lower latency, Amazon CloudFront uses a global network of 310+ Points of Presence (300+ Edge locations and 13 regional mid-tier caches) in 90+ cities across 47 countries<\/p>\n\n\n\n

Technically Amazon CloudFront works in the following manner :<\/h6>\n\n\n\n

a) A user accesses the application or website and requests one or more objects such as an image or an HTML file.<\/p>\n\n\n\n

b) DNS then routes the request to CloudFront’s Edge location which is nearest to the location from where the request is made. Nearest distance is measured in terms of latency as we already discussed what latency means.<\/p>\n\n\n\n

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c) In the edge location, CloudFront checks its cache for the requested files. If the files are available in the cache, CloudFront returns them to the user. If the files are not available in the cache, it does the following:<\/p>\n\n\n\n