What is a Virtual Dedicated Server?
A virtual dedicated server also known as a virtual private server offers a mechanism to partition one physical server computer into several independent servers capable of operating without support from any other partition on the same computer. This independence is achieved by each partition possessing its own operating system with the facility to be rebooted independently if necessary.
The partitioning of a single server is an established practice with mainframe computers but until now has not been a feature elsewhere. However the development of virtualization software technologies recently regenerated the use of this practice.
What Does a Virtual Dedicated Server Provide?
The Virtual Dedicated Server connects between a shared web hosting service and a dedicated hosting service. In software terms this relates to the provision of a separation between customers utilizing the Virtual Dedicated Server. A financial saving is reflected in this approach being cheaper than might otherwise be encountered using a physically dedicated server. Additionally because a Virtual Dedicated Server uses its individual operating system, customers control access to the machine and will be able to apply any software allowed by the operating system.
However some software can encounter problems operating in the virtual environment including firewalls and anti-virus clients. This shared hosting environment may also attract limitations created by the Virtual Provider host although this can vary significantly between hosts. The Virtual Dedicated Hosting Server is usually a single machine that is additionally limited by processor power, Ram and disk space.
The Virtual Dedicated Server has shown itself to be useful as an apparatus on which to carry out research by running two identical copies of the same software on two separate partitions and applying tests on one for detailed analysis without actually causing disruption to the second that can then be updated in line with whatever resolutions were identified for the upgrade. This technique eliminates the necessity to run several physical servers in order to accomplish the same result. Additionally the Virtual Web Server can also be employed to experiment running software with identified security imperfections in order to provide a comprehensive analysis of how the imperfections were manipulated. All this can be easily achieved while another partition is running either other versions of the software without any of them being affected by the other’s presence on the identical server.
How a Dedicated Virtual Hosting Server Works on the Web
The Virtual environment exists in two separate categories – hardware and software based. However the physical server behaves normally when starting by booting in the normal way before engaging programs to boot each of the virtual servers within its virtual environment. Because the virtual servers have no direct access to hardware they are commonly booted from a disk image.
A software based virtualization environment is accomplished using a shared kernel together with some main node resources. A hardware based virtualization environment eliminates the possibility of any real time quota modification. This offers improved security for the environment and would be useful to commercial users.
Windows and the Dedicated Virtual Server
A window dedicated virtual server is commonly offered by the majority of dedicated hosting service and generally includes the following: Windows 2000, Windows 2000 Advanced, Windows 2003, Windows 2003 Web Edition and a Windows 2003 Enterprise Server