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Questions tagged [cdn]

A Content Delivery Network is used to distribute data to end users of an Internet service. It is typically used for large scale distribution, and employs caching and numerous edge locations to speed up and reduce the bandwidth requirements of the process.

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Multiple data centers and HTTP traffic: DNS Round Robin is the ONLY way to assure instant fail-over?

Multiple A records pointing to the same domain seem to be used almost exclusively to implement DNS Round Robin as a cheap load balancing technique. The usual warning against DNS RR is that it is not good for high availability. When 1 IP goes down…
Valentino Miazzo
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No Cache-Control Header for files from AWS CloudFront with S3 Origin

We just migrated to Amazon AWS. We currently have an EC2 instance that's working well. It's running Nginx in front and Apache in the back-end. That's running well also. All sites are launched properly and includes the Cache-Control header for files…
jarvis
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Does CURL cache requests?

This is a pretty long question, so bear with me. I wanted to stress my Akamai Server logged in from an AWS instance. So, I started running ab benchmark. However, they seemed ridiculously fast to download ~3 MB video files. Naturally I wanted to see…
Akshaya Shanbhogue
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How to do regional DNS like a CDN does?

I guess this question could be entitiled, how do CDN's work at the DNS level but the real problem I have is that my company has datacenters in three continents and we have to have europe.example.com us.example.com and asia.example.com CDN's…
Stewart Robinson
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When does a CDN (content delivery network) become worth it?

At what point is it worth adding a CDN (content delivery network) to your website? Does it make sense to use it for a relatively low traffic website that's a web application? The clients are all over the USA. Will a CDN even offer a noticeable…
Chris Marisic
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CDN: How is it possible that my DNS delivers a different IP depending on the visitors location?

I found this explanation how a CDN works. But there is one thing I don't really understand. Let's assume I setup multiple DNS servers at my location and they use the nameserver domains dns1.example.com, dns2.example.com and dns3.example.com. This…
mgutt
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Using Google's App Engine as CDN for static files

I am planning on moving my static files to Google's App Engine. I was wondering if this is a good idea to do. I have read that is it possible that Google will cache your files on multiple locations, which is a good thing in my opinion. The setup…
Saif Bechan
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How can I verify that an RTMP stream URL is working?

I have been put in charge of setting up a CDN account for streaming video but am not actually running the site that will host the content. How can I test that a published RTMP URL is working? Do I need to create a test page with a Flash video player…
Dave Forgac
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Looking for a recommendation on measuring a high availability app that is using a CDN

I work for a Fortune 500 company that struggles with accurately measuring performance and availability for high availability applications (i.e., apps that are up 99.5% with 5 seconds page to page navigation). We factor in both scheduled and…
Tim Reddy
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How to redirect users to different servers based on their location?

I have a website which is developed by using ASP.NET and MY DB is MySQL. Currently it hosted in USA Servers. But When I try to access it near India dynamic contents are loading too slowly. It is acceptable since request has to go to another side of…
Prageeth Liyanage
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Does a CDN still work even when my server is down?

I am a website owner planning to use Amazon's cloudfront S3. I have been reading all the stuffs about what a CDN can do but i still have an unanswered question. Does a CDN still work even when my main server is down. That's the main reason i am…
Tola
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How do CDN (Content Delivery Networks) server work?

There are many CDN (Content Delivery Networks) for hosting mainly static content. How do they work? How they handle http requests?
Manthan Desai
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Should AWS CloudFront *increase* load time for infrequently accessed files?

I am new to CDNs and experimenting with CloudFront. I have set everything up and all appears to be working fine. I can create a static image on a page and access it though my CloudFront distribution. I am using a custom origin (i.e. not an s3…
Greg
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Configure AWS Cloudfront to log to S3 bucket in another AWS account

I have some AWS Cloudfront distributions spread out across different AWS accounts. I'd like to store the access logs from these distributions in a single S3 bucket in a single AWS account. This is possible, but it isn't documented (that I can…
Garreth McDaid
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Amazon S3 appears to be blocking cloudflare IP addresses. How do I fix it?

I have static content that is being served by Cloudflare. Cloudflare points to Amazon S3 to pick up the static content and serves it via a CNAME (cdn.mydomain.com). The bucket is setup properly and everything was working fine for months until…
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