How to connect two servers while creating a web application?

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Hello, i'm a newbie when it comes to web application production. I want to know what exactly is the meaning when people do say they run 4 servers after building their web application?
I want to know this because in my own understanding, why will you be increasing hard disk size and server when you are not the hosting company? Please, i need to know

Posted 4-Jun-15 5:19am

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Mohamed El khames Bakir · Answer 1 · 2015-06-04T05:31:00

Solution 1

If there is a huge amount of incoming traffic for your application, one server is not sufficient to process them. Somay need many servers to host you application and share the traffic among them. This is called what called a Web Farm

Posted 4-Jun-15 5:31am

Mohamed El khames Bakir

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[no name] 5-Jun-15 15:23pm

Nice reply. Does that mean that if i develop a web application and then decide to host it, i'm not the one to be worried about increasing the servers?
And the server we are talking about is it "database server" or "internet server"?

F-ES Sitecore · Answer 2 · 2015-06-04T05:40:00

It's not for increasing hard disc size, it is for performance. It means they have 4 servers that all run identical copies of their website, and there is a load balancer than distributes incoming requests across all four servers, so rather than one IIS servicing every request, each IIS only needs to service a quarter of them. Improving processor speed, memory size etc is only going to gain you so much performance (this is called "scaling up"), and when you need even more performance then you're going to have to start using multiple servers (this is called "scaling out"). It's obviously more expensive as you need the extra hardware and licensing costs.