A content delivery network or content distribution network (CDN) is a system of computers containing copies of data placed at various nodes of a network.

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37
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806 views

When did you decide to use a CDN? How did you measure the “success” of using a CDN?

When did you decide to use a Content Delivery Network? How did you measure the "success" of using a CDN to help justify the additional cost? Added a bounty. Hoping to get interesting stories from ...
33
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4answers
5k views

Why do big sites host their images/css on external domains?

Why do big sites (Facebook, Twitter, Google, Tumblr & so on) host their images/css on external domains? Facebook: http://static.ak.fbcdn.net/ Twitter: http://a0.twimg.com Google: ...
17
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2answers
1k views

Where can I find the full list of Google/Microsoft CDN hosted AJAX files?

While Google hosts this list and Microsoft hosts this one there are several files missing such as jQuery UI CSS. Where can I find a complete listing of all the resources offered for major AJAX CDNs, ...
16
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4answers
20k views

Is the Bootstrap CSS on a CDN yet?

Just checking to see if anyone knows of a CDN for the bootstrap css framework.
14
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2answers
10k views

Is there a way of using HTTPS with Amazon's CloudFront CDN and CNAMEs?

We use Amazon's CloudFront CDN with custom CNAMEs hanging under the main domain (static1.example.com). Although we can break this uniform appearance and use the original ...
14
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4answers
5k views

CDN - Content Delivery Networks. How do they work and why would I want to use one?

What exactly is a Content Delivery Network (CDN), how does it work, and why would I want to use one for my web site? Which are the well-known CDNs out there?
12
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5answers
2k views

What is the advantage to hosting static resources on a separate domain?

I notice a lot of sites host their resources on a separate domain from the main site, e.g. StackExchange using sstatic.net, Barnes & Noble using imagesbn.com, etc. I understand that there are ...
11
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3answers
25k views

What's the best FREE CDN service available? [closed]

It seems like using CDN is a best option to provide users a great browsing experience. But, plans of the major CDN providers seem costly. So, I would like to get used to the CDN thing before I ...
11
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2answers
405 views

When to switch to a CDN?

I have read about CDNs and what they do. The question I have is three fold. When should you start to use a CDN? My site is small currently and do not see the need for a CDN but is there a general ...
10
votes
1answer
360 views

When and when not to use a CDN

I'm working on a web-application that loads a couple of small gif images onto the screen. I'm using a relative path, which means they are loaded from the same web server that serves the php page. The ...
10
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2answers
2k views

Image CDN with API?

My company uses flickr and picasa web albums as poor man's content delivery networks (CDN) for image hosting, but I'm curious if anyone has any recommendations on any other services that might be ...
7
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2answers
596 views

Can I use imgur as a CDN?

I have an e-commerce site and I want to use imgur.com as a CDN for my product images by setting the image source of my image. I did not see anything in the ToS specifically about this. Can anyone ...
7
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1answer
476 views

How is Apple's enormously image-heavy site served so fast?

Took a profile of the "Smart Cover" page on Apple's site using Pingdom. It's requesting 241 objects for a total page weight of 3472.6 KB! An absolute mammoth. How does this possibly translate into ...
7
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2answers
2k views

How to use Cloudflare and Namecheap email forwarding at the same time?

I want to use Cloudflare, and it requires that I use their nameservers. The problem is that I'm using some features from Namecheap like email forwarding, which will be disabled (if I didn't get it ...
7
votes
1answer
209 views

How much do other CDNs charge?

I'm currently using Amazon S3 and CloudFront as a CDN to serve my images. Amazon publish their prices on the site: $0.120 per GB transfer and $0.0075 per 10,000 HTTP Requests. However, other CDNs ...
6
votes
2answers
139 views

How does a CDN like ClouldFlare work?

What I understand so far: You keep your current web hosting, but you change the DNS servers for your site from the DNS servers of your current hosting to CloudFlare's DNS servers. CloudFlare serves ...
6
votes
3answers
471 views

Creating a CDN to boost page ranking?

I had a thought about CDNs and if they affect page rankings. Lets say hypothetically if I was to create a CDN as a subfolder in my site. This folder would contain a resource that is useful e.g. ...
6
votes
2answers
763 views

How does a CDN work on the tech side?

I never used a CDN before so this is a noob question, but how does it work on the tech side. For example right now when a user uploads an image on my site it is uploaded to the "/uploads" folder at ...
6
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2answers
157 views

Separating static/uploaded content from the site

I have a site where I anticipate to have a large amount of users. I've heard that it is a good idea to separate user content (uploaded images) and place them on a separate static server where lighttpd ...
5
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2answers
2k views

is it true that CloudFlare really doesn't affect dynamic content?

I've been reading the CloudFlare FAQ, I understand that is acts as a reverse proxy and all requests to your domain will go through CloudFlare. They say in the FAQ that it won't slow down dynamic ...
5
votes
7answers
372 views

Looking for a CDN

Most of the CDN's that I've seen require you to upload your content in advance. I'm looking for a CDN that, upon receiving a request for a resource it hasn't seen, will contact my application server. ...
5
votes
2answers
470 views

CDN solutions pros and cons

As the sysadmin in our organization I've been asked to look into CDN solutions as we have plans to roll out a web platform that is targeted at developing countries. Here is my research so far on the ...
5
votes
1answer
561 views

Does google contribute ranking from cdn.example.com to example.com?

Background From my understanding, http://mywebsite.com/image.jpg, can help the ranking of http://mywebsite.com in a search engine, such as Google (obviously the search engine of primary concern). ...
5
votes
1answer
2k views

HTTP Header Cache Time: s-maxage and max-age

I am setting up a CDN for my website, I found the following sample for adding to the 'httpd.conf' file, this is used to adjust the cache-time for client and CDN: ExpiresActive On ExpiresByType ...
4
votes
5answers
742 views

Is it ethical to use Google Analytics on a site crime victims use to make 'anonymous' reports?

Our local police force have a website for rape victims to use to report attacks anonymously. At the top of the page is a 'Report anonymously' link, which takes you to a page using Google Analytics as ...
4
votes
2answers
431 views

CDN for authenticated sites

We have a site that requires users to sign into. Typical stuff. Today, all the content (dynamic and static) is behind the login process, and you cannot access any of the pages or files via a URL ...
4
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1answer
558 views

Google CDN or Akamai

We combine and minify our JS with Minify - the combined JS is then cached on Akamai. I'm suggesting to my supervisor that we put JQuery and JQueryUI on Google CDN and take it out of our combined JS. ...
4
votes
1answer
173 views

Is Cloudflare unzipping gzipped dynamic content?

I'm using Cloudflare for a small website that is frequently accessed from mobile phones where bandwidth usage is crucial. I used to gzip every php response and this reduced my bandwidth usage, ...
3
votes
9answers
248 views

How do you enhance your websites speed without compromising the design and access?

How do you enhance your websites load speed without killing the design and accessibility? File compression, CDN, Gzip? What are the best tools for doing so? For example, Google has optimized their ...
3
votes
2answers
542 views

Images on a subdomain, hosted on the same server — will simultaneous downloads increase? (CDN)

Browsers only allow you to download a limited number of concurrent files from the same domain. Would a subdomain for images (basically as a content delivery network) on the same web hosting server ...
3
votes
1answer
2k views

Can Amazon Cloudfront files be served GZIP'd?

If i'm running a WordPress website with the W3TC plugin installed, and have my static CSS/JS minified files hosted on Amazon's CDN, is there a way to serve them GZIP'd? I have the basic understanding ...
3
votes
3answers
595 views

Need a CDN with SSL [closed]

We currently use Edgecast through Speedyrails. Back when I did my research they were both fast and very cost-effective. I haven't looked in a while, but now we need SSL on our assets as well. I ...
3
votes
5answers
2k views

Does it matter where a server's physical location is?

I am located in the UK, and most of my clients are also in the UK. However. I find some of the products available in the US to be easier to use. I won’t name specific companies, but the price and ...
3
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3answers
264 views

Is it possible to know where a CDN's servers are located?

Are there any tools or online applications that can list where a CDN's servers are located?
3
votes
3answers
72 views

About cdn architecture to route way

Our web system, use the third-party cdn service. Assume that the user set the local dns with the googledns or opendns to visit our web sites, so cdn service will select the closest cdn proxy node. ...
3
votes
1answer
46 views

Do browsers recognize the same files served by different subdomains?

I have my website assets stored on Amazon S3 and served by CloudFront, from a separate domain name, to act as a cookie-less domain (so website.com for the website and websitestatic.com for static ...
3
votes
2answers
202 views

prevent hotlinking of off-site content?

I have a www.example.com site where I serve all static content (e.g. http.//www.example.com/image.jpg) off a CDN with URLs like http://static.example.com/image.jpg An Apache 2 .htaccess rule ...
3
votes
2answers
218 views

Concerns about moving media files to a CDN and impact on SEO

I'd like to move all my media files to a CDN (Windows Azure is my best choice for now). Two questions : How can I avoid SEO and redirections issues for the previously uploaded media files ? For ...
3
votes
1answer
2k views

Costs of hosting static files on Google App Engine

I am considering using GAE as a kind of CDN, to host an entire static website. Soon they will start using new pricing. Does every site visitor start a frontend-instance? What will be the cost ...
3
votes
1answer
125 views

CName for static images - will Google crawl?

I am planning to serve images on a CDN using a CNAME: images.mysite.com. I am doing this because CDNname.mysite.com makes ugly URL's and MAY be bad for SEO (debatable). Will Google crawl the ...
3
votes
3answers
315 views

Cloudflare in cpanel is it a no brainer?

I recently noticed Cloudflare cdn service add on in my cpanel. I understand what CDN is, but though it was a more complicated process than the one-click solution that seems to be offered in cpanel ...
3
votes
1answer
682 views

What's the pro/cons of Adobe TypeKit API? Any best practices?

With all the Open Source fonts I have available, and I can download them via the CSS font directive, what's the benefit of the TypeKit API? Are there drawbacks of this? How does it work technically? ...
3
votes
2answers
71 views

Web hosting for Israeli visitors

I developed a version of a client's main website in Hebrew. Most of the Hebrew site visitors will be coming from Israel. My server is fast in the States but sluggish in Israel (per some ping testing). ...
3
votes
1answer
115 views

Significant drop in SERPs on 12th November 2011

Earlier this year I decided to have a look at the SEO of our website. We noticed almost immediately that we dropped significantly in the SERPs for the keyword 'probiotics' (plural) on the 12th ...
3
votes
2answers
808 views

Using YouTube as a CDN

Why isn't YouTube used as a CDN for video and audio files? Through YouTube's api and developer tools, it would be possible to post all media files to YouTube from a CMS and then make a call to them ...
3
votes
3answers
140 views

Does CloudFlare cache videos, and would this wildcard Page Rule work for that?

I'm setting everything up in my website to use CloudFlare. This is my example: On videos.domain.com/Folder-A/Folder-B/ there are some HTML files that I would NOT like CloudFlare to cache. But inside ...
2
votes
4answers
95 views

Splitting big CSS file into parts for quicker loading

So I have a relatively big CSS file. I thought about doing the following, splitting it to 3 parts: 1st part will have the main selectors that are needed to run on the main page that gets the biggest ...
2
votes
2answers
281 views

Do Google/Twitter etc actually use distributed servers to serve their resources?

I'm trying to optimize my website and running a few tests using webpagetest.org. I tried the test from Singapore and Hongkong. I saw that while all facebook, quantcast, chitika scripts were loading ...
2
votes
3answers
468 views

DNS lookup when using a CDN

Using a CDN can vastly improve the load time of a website. I been thinking of using it to host all my external files like CSS, JS, Images, Videos etc. However I was thinking when linking to a CDN, ...
2
votes
1answer
2k views

How to make CloudFlare cache everything?

I want CloudFlare to cache everything, PHP files too, every request from the domain, I want it to cache it. Is this possible? (There are PHP scripts on the domain that print out images, JS and CSS, ...