Cloud server architecture.

Hi Experts!

We want to switch from VPS to Cloud Server soon and do the following:
- use just one service/domain with SSL connection;
- have three servers (or instances, I'm not sure how it works in cloud) in three different parts of the world (e.g. Europe, Asia, America);
- user/visitor would use the nearest server to his location (e.g. if he's in New York, he would use server in America etc.);
What do we need to achieve that? I'm new to cloud servers and I'm not sure how load balancers exactly work (because we will need that, right?).
Would this solution use 3 cloud servers and 1 load balancer or just 1 server and 3 balancers?
P.S. I thought about for this solution.

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ZadoAuthor Commented:
gheist, are you sure about that? I know that cloud server is VPS, but I'm not so sure about other way. What I mean is that companies offering cloud solution offer various different benefits with it, mainly:
- load balancers;
- auto-resizable resources (e.g.: if there's a sudden traffic spike, then there are more resources added automatically to the server in order to handle the traffic);
- you can build a virtual server and use it for few hours and you'll be charged for 2 hours only;
These options are not available with regular VPS.
1) how do you balance single weight (aka server?)
2) all vps support that (openvz, xen, azure,amazon)
3) maybe your regular VPS is too regular and you need bigger & cheaper one.
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Shalom CarmelCTOCommented:
A regular load balancer will not do what you want.
You need DNS geo load balancing, like the Dyn Traffic Director. 

And yes, a VPS uses virtualization, the same basic technology like cloud servers. The difference is in the economics and the add-ons: Autoscaling, storage, everything as a service.

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ZadoAuthor Commented:
shalomc, that is massive help, thank you! However, I will give a chance to other experts, any additional comments will be appreciated.

gheist, thanks for your contribution, I appreciate it.
Shalom CarmelCTOCommented:
No problem,
Dyn is my top choice in terms of speed, availability and service, but there are other good choices.
If you find Dyn to be too expensive, then NSone has a similar service. I've used them both and both work very well. AWS Route 53 is also an option if you work on EC2.
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