If you're planning to start an on-line enterprise, or if you've already got one, you'll know that there are many different web hosting plans out there - each with its own set of advantages and disadvantages. The least expensive is very popular shared hosting with hundreds of web sites all sharing a single, very large hard drive. However this type of Hosting is not always well suited for all sites, especially for high traffic sites, because it is not always possible to isolate each website from other sites that share the server. The really big sites employ dedicated servers. One company. One server. In between these two options is virtual private server, or VPS. VPS is less expensive (much less) than a dedicated or private server, and offers more freedom and many more options to a growing on-line business than shared hosting. With a Virtual Private Server, each web hosting account receives their own operating system. Users can configure these components without affecting other users on the same physical machine because they are working within their own virtual server. Moreover a VPS hosting environment can be smoothly scaled to even more powerful physical hosts as demand increases. In the long run, hosting on a VPS can significantly reduce the total cost of ownership.

VPS isn't suitable for every site owner. Some people wish to host a low-to-moderate traffic website and are happy with the level of control offered by a web hosting control panel like cPanel or Plesk. These individuals will prefer Shared Hosting for its perceived simplicity and ease of use: they generally do not have linux system administration experience and they are not interested in picking up any. Other have outgrown their shared hosting account or aren't happy with site performance (30-second download times) then it's definitely time to move up to a VPS account. A good web hosting company will help you migrate from your shared account to a VPS account without any breakdowns or hassles. Do I Need VPS? If you plan to expand, offering more products and services, then consider a VPS plan even as a start-up. The difference in price between a good shared hosting plan and a good VPS plan is negligible in the whole bang-buck equation.

These are the main advantages:

PERFORMANCE Shared server accounts are always dependent on the performance and good behavior of neighboring accounts. If one account violates their terms of service and sends out a mass-mailing of spam, this will load the server and negatively impact the performance of all accounts on that server. VPS have guaranteed resources. One customer can not run away with a large share of the resources. You service will run reliably and predictably. If you have a bad VPS neighbor, they will tend to impact only their own account, as each account appears like a separate server to the Internet. They will not be able to grab your memory when you need it, get your server blacklisted, etc.

HIGH CUSTOMIZABILITY Virtual Private Servers are very feature rich. They are functionally equivalent to a dedicated server. Some applications require that certain ports and/or protocols be opened or closed in the firewall. With Shared hosting, custom firewall configurations are not advisable for security reasons. Under the VPS, custom firewall configurations are feasible because of the partitioning between customers. With a VPS, you can close ports using the IPTables feature. You have your own IP Address. You have Root Access. Freedom to reboot your VPS at any time. You can customize services such as web, mail, database, panels, domains and much more... The only limitation is you are not able to install your own kernel. This is due to the nature of how a VPS work.

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