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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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). ...
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1answer
174 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, ...
5
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563 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). ...
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3answers
605 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 ...
5
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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 ...
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1answer
132 views

Setting Up CDN…beginner questions

I am using MediaTemple web hosting and they are using Edgecast's CDN network. I am planning to join CDN service, so I read through the guide, but I am confused about the 'Update your code' section: ...
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1answer
121 views

Is there a limit of emails/pictures per Gravatar account?

I'm building a site to connect patients to doctors. Each doctor will have a profile picture. I'm quite happy to manually maintain the profile pictures as there won't be that many doctors nor will they ...
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1answer
112 views

CDN help, who should I go with and any alternatives?

I have a image hosting site which has grown rapidly over the last 3months and I feel I need to look at a CDN. The dedicated server the site runs on is located in Holland (Europe) whilst image load ...
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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 ...
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3answers
473 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, ...
3
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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 ...
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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: ...
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1answer
214 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 ...
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2answers
637 views

Is there a CDN for large files that doesn't need a manual upload?

I have a MaxCDN account. I am using their pull zones and it works perfectly (they autoamtically download .css, .js etc from my server) Now I would like to use the cdn for large file too, but MaxCDN's ...
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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.
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2answers
1k views

why is my site slower with amazons cdn?

so I have move most of the static objects to amazons Cloudfront CDN example: http://images.storyfollower.com/images/cycleOfStories.jpg which through cname point to the cdn Now I just ran a speed ...
6
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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. ...
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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. ...
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1answer
214 views

How to keep a local copy of all images and still serve images from Amazon S3?

I'm using amazon s3 to host assets for my site (mainly images). At the moment when a user uploads an image via a form, the php script uploads the image directly to my bucket on s3. I would like to ...
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1answer
45 views

Content Delivery Policy setup

I want to secure my website using a Content Security Policy. I'm came up with the following policy: X-Content-Security-Policy: default-src https://www.example.com https://static.example.com; ...
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1answer
128 views

Reference single javascript file from many web applications

I have a javascript file (called secure.js that has several functions defined in it. I also have a Visual Studio solution with ten different ASP.NET web applications. I want to be able to call the ...
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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 ...
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2answers
765 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 ...
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1answer
215 views

Is there any other CDN than Amazon which supports hadoop?

I need know about CDN which offers to store HDFS . I know amazon offers such service but i am looking out if some others are giving some better service , additional features or cheaper service. Please ...
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2answers
707 views

Tahoma, Verdana, Trebuchet, Georgia, etc as webfonts?

Does anyone know if the so called "web safe fonts" like Tahoma, Verdana, Trebuchet or Georgia are available as webfonts (that you can link to and safely use in your stylesheet) on a public CDN ...
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2answers
215 views

Do any CDN services offer multiple urls (or aliases) for your files?

Lets say a company has multiple commercial web properties that happen to use a lot of the same images on each site. For SEO reasons, the sites must not appear to be related to eachother in any way. ...
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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 ...
4
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1answer
560 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. ...
2
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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, ...
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1answer
146 views

Most immediate CDN

I'm interested in the user experience effects of a near-instantly loading home page. Are there CDNs specifically designed to serve tiny data, like a 500-byte HTML page, to the browser as fast as ...
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2answers
501 views

Can parking a domain on my primary domain have an effect on primary domain's SEO?

My Question is this: I have a primary domain (assume it's domain.com). Now I parked domain-static.com on domain.com. The idea is that static content (images, JS, CSS) is served from ...
3
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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 ...
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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 ...
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1answer
195 views

Two URL CDNs are better than one for SEO and Speed?

For example, my URL is: www.site.com For SEO, PageSpeed and Server Tweaking for ultimate performance, and speed, my code places static files like JavaScript, CSS and Images on my CDN: ...
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1answer
214 views

How to update DNS Zone for a static domain

I am running this site: www.thetechnofreaks.com on Wordpress. Recently I came across a plugin that claims to increase the page load efficiency of my site. the plugin details can be found here: ...
2
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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 ...
5
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2answers
471 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 ...
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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 ...
11
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2answers
406 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 ...
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2answers
229 views

Is Google Page Speed Service a competitor for CDN services

I've been googling around for a cheap CDN service and came across: http://code.google.com/speed/pss/index.html This seems to be a competitor to other CDN services, is this the case? Thanks
10
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1answer
362 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 ...
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1answer
180 views

CDN png image not accessible from my machine

I'm getting a very strange error on http://cure.org where the following PNG image is not being delivered from the CDN to webkit browsers (both Chrome and Safari), but Firefox is loading it just fine. ...
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2answers
2k views

Using CDN vs having your own static server, and how it's done?

I would like to speed up my site and am considering moving all static files and user uploaded content to a separate server. I have an option to use a CDN or to setup my own static server and serve ...
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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 ...
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1answer
125 views

Where does content distribution network come into picture for youtube

I have vaguely heard of CDNs (Content Distribution Network) and I suppose they come into picture in context of multimedia(audio/video) online sites like youtube. My question is what really are these ...
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1answer
96 views

Use a CDN to handle UGC uploads

I was on the phone with a sales guy from Akamai and he mentioned that they offer a service that can handle user generated content uploads (videos in our case) to their edge network. Unfortunately, ...
7
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1answer
480 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 ...
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2answers
390 views

Whole site caching on MediaTemple's ProCDN - cname setup

Am unable to properly configure ProCDN to point to my website's root. I have a completely static website: http://thaifood-recipes.com no PHP, MySQL, etc. Just static HTML, images, CSS, etc. I have ...
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1answer
218 views

Do CDNs work with POST operations?

I'm using a CDN (Level3) for the first time and I'm a bit confused. I'm accessing dynamic URLs such as http://cdn.mysite.com?getItem=1234 that return text data. Do CDNs work with HTTP POST ...
3
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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 ...