Virtual private servers are used to get the result of multiple servers using a single physical server. The single server is logically divided to get the effect of multiple servers. The virtual servers are fully independent and can operate on their dedicated operating system. The performance of one server never influences that of another server. There exists maximum security and isolation in the working of virtual private servers.

Virtuozzo VPS is such a virtual private server product introduced by SWsoft. This has many virtual servers working truly isolated from one another and connected to a single server. The servers connected can share the hardware, load, traffic and even the software licenses between them. The Virtuozzo uses the virtualization implemented at operating system level. This has a high capacity that the maximum number of virtual servers that can be connected to a single server can vary from ten to hundreds.

The virtuozzo VPS demands the virtual servers to run on the same OS as that of their host server. The host running on Windows 2003 should have all the virtual environments (VE) to run on Windows 2003. Each VE can possess its own files, applications and processes and is capable of existing as if it were an independent server. The access is provided through inter connections in network.

The operating level virtualization used by Virtuozzo VPS partitions the kernel among the servers. The virtual servers run the instances of the kernel rather than a single kernel. This is a lighter method than other virtualization techniques and so adding up the load in the virtual environment is not a big deal in Virtuozzo VPS.

The critics of Virtuozzo VPS point out that since the OS is duplicated and there is actually only one server, the users who require more than one server for their development purposes, can’t get the benefit from Virtuozzo VPS. Also they point out the lack of a high security and privacy in Virtuozzo. But SWsoft have numerous reasons to oppose these sayings about Virtuozzo VPS. They claim that Virtuozzo ensure security and isolation to the same extend that any other VPS offers. Even though they are running on a single OS, they are independent in having all files and libraries on their own. The administration is highly powerful in Virtuozzo even though a single server runs the original operating system for all the virtual servers.

Because of the flexibility that Virtuozzo offers in having the multiple virtual servers, they are having high demands among all sorts of users. The benefit of addition of servers as required by the user will help to reduce the traffic to a considerable amount. The load can be simply added to the root server without much effort. The only action required is to create an instance of the operating system. Thus Virtuozzo software has been a successful venture in virtual private server environment.