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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10answers
12k views

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 ...
11
votes
8answers
996 views

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 ...
10
votes
6answers
2k views

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 ...
10
votes
2answers
4k views

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, ...
8
votes
4answers
29k views

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 ...
8
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2answers
9k views

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?
6
votes
6answers
939 views

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 ...
6
votes
3answers
3k views

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. ...
5
votes
2answers
1k views

Using EC2 as a Cloudfront Origin Server

Amazon has recently added the ability to use any server as an origin server for Cloudfront, removing the original S3 only restriction. My question is- how do I set this up? The AWS web-gui seems to ...
5
votes
2answers
3k views

CDN vs own apache servers?

i know that CDN is just for static contents. but then i still have to spread out by apache servers to all corners of the world right? so when i have done it, why dont i just set up some dedicated ...
5
votes
3answers
1k views

How to Tell Whether a site is using Akamai Networks

I'm trying to understand precisely how Akamai uses DNS lookups to redirect users to proximate servers. As I understand it, the client's browser tries to resolve a DNS name, such as ...
5
votes
3answers
8k views

Firewall rule to allow access to windows updates or other resources on a CDN?

What's the best way to poke a firewall hole in a border firewall to allow windows updates? As far as I can tell, the windows update sites are hosted on a content distribution network that can ...
4
votes
2answers
615 views

How to compare CDN services?

What are the metrics and their priorities to compare various CDN services?
4
votes
2answers
325 views

How can I handle big traffic spikes on my dedicated server?

I have an E-Commerce site, which gains a sudden peak of very high traffic when I turn on different ads campaigns. From this moment on, my current dedicated server (Hostgator, 4GB Memoray, 100mbps ...
4
votes
1answer
1k views

Akamai / CDN - How much do CDNs like akamai cost? [closed]

I haven't been able to find any numbers related to cost via google or price sheets. How much do these services realistically cost (akamai, limelight, any of them)? Are there any good CDN ...
4
votes
1answer
2k views

How to set up a private CDN using nginx?

Here is the problem: I have a Linux server in Europe serving a busy Drupal site using nginx+php-fpm, I have another Linux server in the US (where a big portion of my visitors are coming from). The ...
4
votes
3answers
4k views

Akamai NetStorage vs. Akamai edge service

What's the difference between using Akamai NetStorage vs. Akamai's Edge Service? Below are the concepts that I believe differentiate them but I'd like more details from more experienced people. ...
4
votes
3answers
4k views

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.xxx.com ...
4
votes
3answers
3k views

Akamai vs smaller CDN for small/medium-size ecommerce traffic? (caching, latency, NetStorage)

The small/medium sized online retail company I work for uses Akamai as our CDN for static images, but I'm wondering whether it might be hurting rather than helping and, if it's suboptimal, what we ...
3
votes
3answers
560 views

which CDNs are popular websites using? [closed]

i wonder which CDNs popular websites are using? is there a list giving some more information about this? would be great to have some more insight.
3
votes
5answers
2k views

Pointing www to a CDN(Akamai)

Why would someone point(CNAME) www.example.com to a cdn? When I run host on Etsy, I get a [c]$ host www.etsy.com www.etsy.com is an alias for www.etsy.com.edgekey.net. www.etsy.com.edgekey.net is an ...
3
votes
2answers
241 views

What amount of effort and money should one invest against DDoS threats? [closed]

Typically, when you invest money to protect yourself against some possible threat, you should take into account two factors: the probability (p) of the problem actually happening how much money (m) ...
3
votes
4answers
1k views

Does Amazon S3 have “sub-directories”? (Rackspace Cloudfiles does not)

In Rackspace, all the "buckets" are one level. Buckets cannot be inside other buckets. This makes it very hard for ORGANIZATION! Edit: does anyone have any suggestions on which one to use...for best ...
3
votes
2answers
1k views

CDN CNAMEs not resolving to customer origin

I have set up an Edgecast CDN to mirror all my static content. Because I use the root of my domain (donaldjenkins.com) to host my main site—using Google Analytics which sets cookies—I've stored the ...
3
votes
3answers
294 views

Monitoring CDN from different geographical locations

Recently we had a problem with our CDN service: one of edge locations cached incomplete version of javascript file and our customers from United Arab Emirates (and maybe some other nearby countries) ...
3
votes
1answer
2k views

scalability: when to use CDN?

i've read about CDN but dont know exactly what it is for. lets say i've got an international social network (text and image content), and it's growing in traffic from different countries, do i have ...
3
votes
2answers
1k views

CDN that supports custom SSL over custom domain [closed]

SSL is the biggest problem: S3/Cloudfront doesnt support it. Rackspace CloudFiles just told me they will support it in Q2 2011. MaxCDN told me its $299 setup fee and a $299 monthly fee. Based on ...
3
votes
2answers
689 views

how does CDN routing work

So I know how a CDN works in principal and how it works from a customer's perspective. My question is more about the root of how they work, the routing. My limited knowledge points to just some fancy ...
3
votes
1answer
79 views

How to do 'naked domain aliasing' like DNS hosts that support it?

My goal is to use GitHub Pages and also benefit from their CDN, without having to use a third-party DNS host that supports DNS ALIAS record types (or ANAME - neither are accepted standards). I want to ...
3
votes
1answer
727 views

Setting up CloudFront CDN on a cookieless root domain

I have recently set up an AWS S3 bucket for my site's static content, along w/ a CloudFront distribution for my CDN. I have this working using a sub-domain. However, after running YSlow, I realized ...
3
votes
1answer
239 views

Using amazon S3 as storage for attachments in a web-mail system

I am looking to use S3 as data storage service for a mail system. The idea is to allow users to upload files that serve as attachments to their emails, which are then available to download from the ...
3
votes
1answer
2k views

CloudFront or other CDN with RTSP streaming?

So I've been bouncing between CDN's trying to optimize our serving solution. We're serving short video clips into our code that display either an html5 video element (MP4 or OGG) or a flash swf (FLV) ...
3
votes
0answers
133 views

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 ...
2
votes
2answers
414 views

CloudFront - Users requests static files non-stop to make your bill high?

I had this weird wondering once. If I am using CloudFront as my CDN, I pay per requests made on my static files. So here comes the wondering. Can one keep requesting the same file in a non-stop ...
2
votes
2answers
123 views

What do you do when your site scales so much that uploaded_media can't fit on one machine? [closed]

What do you do when your site scales so much that your uploaded_media (in Django, where all uploaded media files from users is stored) can't fit on one machine? My personal case, I'm using Django and ...
2
votes
5answers
9k views

How to upload files from Amazon EC2 server to S3 bucket?

What is the default way to upload files from a EC2 web server to a S3 bucket for content delivery?
2
votes
2answers
229 views

Is subdomain (CNAME) slower than using original address?

I am no expert at this at all, so I am wandering is there a difference in speed, etc. when using some subdomain (CNAME record) over the original address? For example, when using CDN like Amazon S3. ...
2
votes
1answer
101 views

Are there any CDNs that will automatically edge cache anything you set cache-control headers for?

I'm new to CDNs. I have dynamically generated pages that have a 30 minute expiry on each URL, and I want these to be edge cached. Are there any CDNs that can just act as a proxy cache and when a user ...
2
votes
3answers
799 views

Does cloud storage replicate the data over many datacenters if so it means i benefit content delivery network?

Let's assume that i want to use cloud storage service from one of the cloud storage provider, i got X gb structured and unstructured data and i will use this data as my contents of my interactive web ...
2
votes
1answer
503 views

How secure is CloudFlare's basic SSL

CloudFlare's basic SSL package provides SSL encryption for you site, but only between your customer's browser, and the CloudFlare server where SSL is terminated. The connection between CloudFlare and ...
2
votes
3answers
128 views

How to host a Wordpress site on multiple servers due to geographical siteload issues?

Wordpress website is currently hosted in the US, this is where 40% of our target audience is. The rest of visitors are coming form Middle east, Australia, Russia, China, Singapore, UK, Switzerland, ...
2
votes
2answers
486 views

Best way to implement Amazon CloudFront for established website

Some of you may have a solution for this, and I need to hear it. Basically, you have a website, a lot of categories ( games, blog etc ). The idea would be to use Amazon CDN for images, flv's, ...
2
votes
2answers
77 views

Web host for serving both western and asian users

Are there any hosting companies specialized in serving both European, N+S American and Chinese, Indian, Korean or Japanese users? I am looking for a dedicated or VPS to host a Drupal site, not a CDN. ...
2
votes
2answers
1k views

Recommend a content delivery network (CDN) for a specific purpose [closed]

could you please recommend a CDN for the following use: 1) Ability to update files on the edge servers automatically through API, so it should take no more than 5-10 minutes to make a new version of ...
2
votes
2answers
139 views

Using Redirect for an SSL CDN to have a Custom Domain

We're looking to move our website/app assets to a CDN. The problem is, our CDN doesn't offer custom domain names with SSL. In other words, for SSL they offer https://1234.cdn.hostingcompany.com but ...
2
votes
1answer
478 views

How can you use gzip for static website content served by a Content Delivery Network? Does it improve page load times?

I'm serving up most of my static media from a CDN for my website. This includes images, videos, javascript files, and CSS files. YSlow and Google's Performance tool tell me that I should be gzip'ing ...
2
votes
1answer
69 views

static big files and a way to serve them securely (central authentication CDN)

I need to serve few static big files(about 4GB each) to several users, using 5 servers that are in different geographical regions. The idea is that nobody else gets the content as there's ...
2
votes
1answer
356 views

SSL Cert for custom domain endpoint on Azure CDN

We have some content hosted for our Azure application on the Azure CDN - we can access this nicely over https using the standard endpoint address, however for 'neatness' our customer would like to use ...
2
votes
2answers
158 views

Can a CDN (specifically CloudFront) stampede its origin server after a miss?

Similar to how a memcache server can stampede a db after a missed hit. Should I ever expect high traffic from my CDN(s)?
2
votes
3answers
604 views

Simplecdn alternatives for progressive streaming

I´m looking for a CDN to host my videos, but I need the ability to progressively stream from them (currently not available at simplecdn).