VDS (Virtual Dedicated Server) or VPS (Virtual Private Server) is the hosting service where user is provided with a virtual server with maximum privileges. VDS or VPS emulates the operation of a real physical server - there is root access, it is possible to install its own operating systems and software. Same physical server usually runs a number of independent virtual servers.
There is an opinion that the term defines virtual servers with different types of virtualization: VPS means virtualization at the operating system (software) level, while VDS is hardware virtualization. In fact, both terms appeared and developed in parallel, and designate one and the same thing: a virtual dedicated server running on the basis of the physical one.
We use the term VDS (Virtual Dedicated Server, virtual dedicated server), because we believe that it more clearly reflects the essence of the service provided.
Principle of operation of virtual dedicated server is not much different from a physical server. It has no restrictions on the number of hosted sites, databases, domain zones, ssh-ftp-email-users, and its owner-administrator has the right to work with files, install applications and perform other operations, as on a real full-fledged server. Each virtual server on our hosting has its own IP address, which is not shared with anyone else. If necessary, you can order additional IP addresses
The virtual server operates independently of the others located on the same host machine. This means that the failure of one server does not affect the functioning of the “neighbors”.
Unlike regular virtual (shared) hosting, virtual servers have protection against DDoS-attacks, and data security is guaranteed by the ability to create a backup.
Advantages of using VDS / VPS compared to virtual hosting:
Disadvantages of using VDS / VPS compared to shared hosting:
Advantages of using VDS / VPS compared to a dedicated server
Disadvantages of using a VDS / VPS server versus a dedicated server:
We offer our customers two types of server virtualization to choose from: OpenVZ (at the operating system level) and KVM (hardware).
The technology of OpenVZ is based on the Linux kernel and allows you to create and run isolated copies of the operating system on same physical server - the so-called “Virtual Private Servers (VPS) or“ virtual environments ”(Virtual Environments, VE). This technology is characterized by high performance, ease of use and ease of server management. The user can also at any time add capacity and processing power of such a virtual server. In this case, the choice of the operating system is possible only from the range of those proposed (Debian, CentOS, Ubuntu), since the virtual servers of a particular host machine use a common Linux kernel.
KVM (Kernel-based Virtual Machine) is a hardware virtualization technology that allows you to create a complete virtual copy of a real physical server on a host machine. Each such server is allocated with its own area in RAM and hard disk space, its own network card, which increases the overall reliability of the server. In fact, KVM technology allows you to create a virtual server with its own OS kernel that is completely isolated from its “neighbors”, which the user can customize and modify to suit his own needs with almost no restrictions. You can install any operating system: Linux, FreeBSD, Windows, and even your own image. At the same time, changing server resources is impossible - if your project “grows” from the originally selected tariff, you will need to order a more efficient virtual server at the appropriate tariff and transfer all data to it (as is the case with a real dedicated server).
Considering the features and advantages of KVM virtualization, its tariffs are slightly more expensive than similar ones with OpenVZ virtualization. You can read more about comparing server virtualization technologies in our special material.
Virtual server is ideal for sites that exceed the capabilities of regular hosting, high-load network services, as well as for designing, developing and testing software. Closed corporate projects with increased requirements for data security and privacy are also largely based on virtual dedicated servers - this is especially true for small companies for which the physical server cannot be purchased or rented due to budget constraints. See other reasons for switching to a VDS or VPS server.