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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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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922 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 ...
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127 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 ...
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2answers
306 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 ...
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3answers
219 views

How can Cloudlfare speed up PHP/MySQL?

My dreamhost plan offers me to use cloudflare CDN to speed up my pages. My page uses PHP/MySQL. I was wondering how this works, because everytime the page is loaded it must execute the PHP code and ...
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3answers
580 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, ...
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111 views

Does using a CDN such as Amazon Cloudfront save hosting bandwidth?

I have a site hosted on a shared server with limited bandwidth. Does using a CDN like cloud front minimise bandwidth usage on my hosting server?
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1answer
59 views

Slower site with the *same* configuration than a mirror copy…?

I've got this Drupal site (ligadelconsorcista.org) that I have to move it from one server to another. The reason was that my older host even when it was pretty decent, it started a couple of months ...
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82 views

Optimising website IP for location

From my understanding of SEO, websites are optimised for the current location of their IP address. For example if xxx.xxx.xxx.xx resolves to the UK then you are more likely to get higher rankings in ...
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198 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: ...
2
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40 views

How can I prevent Facebook from considering Google drive links unsafe on my website?

On my small website I've recently began using Google Drive as content delivery network. This is to solve resource usage issues with my provider. This worked well, but I'm confused because Facebook ...
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69 views

Rehosting content from another server

We have a set of static pages that will augment a customer's existing site. The pages will not reside on the customer's servers for logistical reasons and because we need to maintain control of the ...
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315 views

Can I put ads from more than one Google AdSense publisher under one site/page?

I have a Google AdSense Personal account and recently for some reasons I HAVE TO open a company account. Since an personal account can't be changed to a company one, I have to register a new one, with ...
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256 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
226 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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1answer
273 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 ...
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42 views

CDN caching my HTML pages too!

Recently I started using Amazon CloudFront to serve my site's JS,CSS and images via CDN. However, seems like with those, CloudFront serving my HTML pages as well? Thus http://mydomain.com and ...
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211 views

Does changing the picture folder path of older website affect SEO?

I have a 2 years old WordPress based picture website. Now I am planning to use CDN for my website. But the problem is I have to move my picture folder to a subdomain. For instance my current path is ...
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2answers
405 views

What's the most efficient & economical way to do GeoIP redirects for a high traffic site?

So, I'm setting up a new potentially high traffic site that's made up of several simple static pages. We want to host it as efficiently as possible, as we're both on a non-existent budget and may have ...
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1answer
237 views

Internal CDN and setting up subdomain to increase maximum parallel connections

I've heard that browsers can have around maximum of 6 parallel connections per domain at a time. So I decided to have another subdomain "cdn." then use mod_rewrite to point to media folder then ...
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1answer
85 views

CDN for site with target market in Australia

I was told that http://www.edgecast.com/ is very good CDN provider for Australian market. I have a cloud server based in Sydney Australia but was wondering whether it's even worth getting cdn as my ...
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1answer
488 views

Problems Using CloudFlare On Blogger

Here's the situation. I got a TLD for my blogger blog and set it up using the instructions from blogger. Blogger asks to: Add two CNAME records. For the first CNAME, where it says Name, Label or ...
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2k 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 ...
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126 views

Avoid 301 redirect in cdn.domain.mx

I have a domain with a .htaccess redirection problem. The active CDN the URL should be: cdn.domain.mx/images/test.png but redirects: cdn.domain.mx/images/something.png -> ...
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1answer
458 views

Could a CDN serving static images result in decreased search engine rankings? [duplicate]

I have set up Cloudfront on my site to serve static files only. This results in the image file's URL to change from: mysite.com/image.jpg to uniqueid.cloudfront.net/image.jpg Will this affect how ...
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12 views

I want to build a script CDN for my place of employment [duplicate]

I write a bunch of scripts (javascript, php, perl) for my work. Right now, people have to get the scripts themselves from our sharepoint, and then install it as either a bookmarklet or a greasemonkey ...
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102 views

CDN for zocial css file [closed]

I am looking to use zocial css file for a site and need to figure out if any CDN hosts this file. If not, I will resort to using the local server (or my own CDN package). I do not think relying on ...
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3answers
516 views

Cloudflare is it safe?

I am thinking of signing up with cloud flare, but since i'm not very familiar with the technical side of things, I wanted to ask here first. How safe is it to sign up with services, like cloud flare? ...
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1answer
59 views

Why does a CDN strip the file extension of an image to protect against leeching

So I was reading on Quora and came across this awesome picture: http://qph.is.quoracdn.net/main-qimg-fa81af575c5e0ef69d78fc011a71e865?convert_to_webp=true Trying to isolate this resource I noticed ...
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2answers
1k 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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198 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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128 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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485 views

Why does Google PageSpeed Insights show a lower score for my website when using a CDN?

I'm trying to improve my site's PageSpeed. So far so good, I received score of 91 points for mobile and 97 points for desktops using Google PageSpeed Insights. However, when I add a CDN service for ...
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1answer
27 views

Tumblr disabled custom domain for using CloudFlare

I have a Tumblr blog which uses a custom domain. Yesterday I tried to add CloudFlare to it which was a terrible mistake. Apparently Tumblr does not support Cloudflare and will therefore disable ...
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1answer
24 views

SSL website with non-SSL images only content delivery network

I am serving my own CDN using subdomains for static images only, and want to use a SSL cert on the main website. For example; https://www.example.com would download images from ...
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223 views

Google indexing less images after switching to CDN

After switching to a CDN I noticed that my indexed images went down. I have close to 1000 images on the site with correct tags, alt tags and all of that. Right now we have about 1000 images with only ...
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205 views

Amazon Cloud Front - Changing the origin domain

Currently have a Cloudfront CDN with an Origin pointed to http://mysite.com. The CDN URL is something like jr27a8vopf32a.cloudfront.net. Currently there are a lot of external consumers of a file ...
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795 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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248 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
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1k views

What is the difference between CDN networks and which one is the best out there?

I run a popular site for which I would like to use a CDN network. So far I have found NetDNA since it is easier to setup with W3 Total Cache plugin. There is Rackspace Couldfiles and Amazon. But ...
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2answers
46 views

Google crawl rate dropped after activating CloudFront

Previously we've been using Amazon CloudFront for our static content (js, css etc). But to be able to reduce load on our origin servers and to be able to give our international users a good user ...
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1answer
29 views

How to cache on CloudFlare images that are served to client as JSON?

I am using a gallery on my website that gets list of images from a JSON sent by a php script. So, the javascript gallery calls PHP backend and it replies with complex JSON where images are specified ...
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1answer
99 views

CDN virtual subdomain causes duplicated content

I have created a subdomain and a CNAME record which points to the domain root. The subdomain www.static.example.com is actually a copy of the entire website www.example.com and it is supposed to act ...
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2answers
49 views

How do I pick a host with the fastest access to a third party API?

I'm developing an application that relies on an API that is very time-sensitive. Every millisecond advantage I have over my competitors the better. Is there a good way to determine the optimal ...
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1answer
56 views

Why do CDNs charge so much for private SSL? [closed]

I've been looking at various CDN services, and many of them seem to charge a pretty hefty fee compared to the free shared SSL offering. One in particular, CDN77, is offering private SSL for $700/year. ...
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1answer
159 views

Using a CDN for CMS software (multiple sites)

I'm currently researching ideas for the media management side of a CMS I'm writing. I was looking at having images served from a CDN which is fine on a single site, but I want all sites that run the ...
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435 views

Impact of using a CDN Proxy (like Incapsula or Cloudlfare) with numerous websites

We have a network of something like 70 websites. We have one IP by website for SEO reason. We are planning to move to CDN service like Cloudflare, Incapsula or Google PageSpeed Service to speed up our ...
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1answer
133 views

One CDN with origin pull and two servers

I have two dedicated servers serving the same website. I am thinking of adding CDN to it... Since the CDN will pull the contents from server, my concern is won't it have any naming conflicts ??? To ...
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2answers
79 views

Cache website via CDN for visitors, not for users

I'm not sure what this is called. For example, if you're logged out of Reddit, you see a cached, static version of the site from the CDN. When you're logged in, you don't hit the CDN and instead ...
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124 views

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

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 ...