If you consider server virtualisation technology, virtual private servers are the most advanced in that technology. To make a partition in a single physical server into many isolated virtual private servers, these virtual private servers are used. Every virtual private server is like a networked server system with its own set of init scripts and having users, processes, filesystems, etc.
VPS is an isolated stand-alone server which has following specifications:-
1) It provides full root access and has its own processes, users and files
2) Each server has its own routing rules, filtering, port numbers,tables and also has its own IP address.
3) Each server has its own application software and also its own configuration files for the system.
4) Each server has its own versions of system libraries or it can modify existing ones.
5) It can delete, add and modify any file including files in /root. It can install its own custom or application software and also modify root application software
I think VPS is a good solution for someone whose website outgrows his shared hosting plan limits, while he is not ready for purchasing a dedicated hosting plan.
With a virtual server you have almost similar environment of dedicated server in terms of flexibility and opportunity, with some restrictions in terms of power and space. The virtual server is a subset of a dedicated server on which co-exist several independent virtual servers. So you share the same physical server, but with guarantees of disk usage, cpu and memory.
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Well, as per my thinking VPS hosting is much the same level with dedicated hosting. However, if you are not familiar with VPS hosting/server, you should be careful when choosing a VPS.
with managed vps hosting solution customers really don't need to worry about anything, as support staff members always available for assistance, however, one thing they need to understand, “if you don't know how to fix it, then don't experiment with it … ”
Indeed, it is necessary to have technical skills to handle a virtual private server. However, if a person is not familiar with the technical tasks which are to be carried out in Virtual private servers, it is better to opt for a fully managed vps hosting solution. With managed solutions, customers don't have to bother of carrying out the server management tasks which usually consumes hours.