What is VPS? What is VDS?

Differences between two of most popular virtual servers concept

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.

What is the difference between VDS and VPS

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 and features of virtual dedicated server

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.

Comparison of VDS / VPS to virtual (shared) hosting.

Advantages of using VDS / VPS compared to virtual hosting:

  • Full control: the owner of a virtual dedicated server gets root access privileges (for Unix) or Administrator (for Windows), and can fine-tune the server for the needs of a specific project up to installing the necessary software and changing the operating system.
  • Minimum restrictions: the number of created sites, databases, domain zones, ssh-ftp-email-users is limited only by server resources.
  • Independence: virtual server “neighbors” on the host machine work in isolation and do not “pull” resources from each other, and also use separate IP addresses, while on a regular virtual shared hosting several sites often use the same IP address.

Disadvantages of using VDS / VPS compared to shared hosting:

  • Price: the cost of renting a virtual dedicated server is usually significantly higher than the cost of virtual shared hosting. But we offer comparable prices.
  • The need for administration: the virtual server must be administered as a physical one, so the user needs certain knowledge and skills in this area. The presence of the control panel facilitates the performance of typical tasks: for our clients we offer the

Comparison of VDS / VPS to physical dedicated server.

Advantages of using VDS / VPS compared to a dedicated server

  • Low cost: renting a virtual dedicated server costs the user much less than renting a comparable physical server. At the same time, the performance of VDS / VPS can even be higher (see our study).
  • Simple scalability: it is very easy for a virtual server to add capacity in the form of additional RAM, processor cores or hard disk space.

Disadvantages of using a VDS / VPS server versus a dedicated server:

  • Shared disk system and communication channel: all virtual servers running on the same host machine use the same disk system and a common high-speed communication channel for sharing primary resources. This means that some users may abuse the use of resources and interfere with other customers.
We use an automatic system that finds such users. For violators apply measures from warning to shutdown of the wrongly behaving VDS.

Features of OpenVZ and KVM virtualization technologies

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.

To whom and when is the virtual dedicated server best suited?

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.