Why we won’t host apps on personal computers?
If we want to host applications in personal computers we need to purchase static IP addresses. So with that IP, the users can access the application, but the problems are
1.When suddenly system crash, power cut or some internet issues, then the user can’t access the application
2.For every 10–15 min we need to maintain backup, etc..
So in order to take care of these problems and maintaining application we have host providers.
What is host provider?
Host providers mean we will host our applications in their data centers. So that we can give access to the application word wide. For that, we need to buy a virtual machine from them to host the applications.
We have two types of virtual machines
1.Dedicated virtual machine
2.Shared virtual machine
Dedicated Virtual Machine:-
In a dedicated virtual machine for each user, they will give a separate virtual machine. So only dedicated users will use that ram.
- It is costly.
Shared Virtual Machine:-
In a shared virtual machine, every user will host their applications in the same virtual machine, and they will use the same ram. In order to differentiate users of that VM, host providers will create separate logins for each user of virtual machine.
- It is cheap compare to a dedicated virtual machine.
Cons:-
When there is more hits to the server, will lead to server down or crash.
For example:- If amazon offers an offer to users. In the offer period the orders are more compared to the general period. The number of hits to the server in the offer time is more. This may leads to server down or crash
In order to overcome this problem, we have cloud providers.
Cloud providers:-
Cloud providers are used to hosting the application.
How It Solves The Above Problem:
cloud providers provided a concept called script files.
Script Files:-
This file is used to mention when the server has to replicate.
Because of the replication of the server, the no.of hits will be distributed among servers. Distributing the request to servers will be taken care of by the load balancer. By this, there is no heavy load to a server. So, this can avoid the server down/crash.
Written By — Keerthi Reddy, Sofware Engineer.
