What is VPS? And types of virtualization: OpenVZ and KVM
-
VPS it is a virtual private server and it is a single machine is partitioned into separate servers that each act like a dedicated mac. You have full root access and there is possibility to setup different OS on you VPS, install various software, make changes to server settings, build tables, etc.
Below you can check some advantage of VPS hosting:
- VPS is much more cheaper than dedicated server and you don’t share your space with other customer like on shared hosting.
- VPS is flexible. If you want to upgrade your VPS, it can be done easily. You do not have to pay for excessive resources you have not yet grown into. You can customized VPS with features (CPU cores, RAM, storage/disk space) what you need and safe money on other addons features.
- You will get technical support 24x7 as dedicated server and you don’t need to worry about any issues.
- You get total server space and high security. Despite the fact that you share server with other client you have your own private environment. This means that you will have root access and will also be able to use scripts if you want to.
Also there are two types of the most popular VPS virtualizations:
OpenVZ - operating-system level of virtualization.The common modified server core is used by all machines. The main advantage of OpenVZ is the speed of work. In a few seconds it is possible to reinstall the OS or load the server. One disadvantage of OpenVZ Virtualization is, users are not able to do any kernel modifications. All virtual servers have to get along with the kernel version the host runs on.
KVM - it is hardware virtualization technology that allows you to create on the host machine a complete virtual analog of a real physical server. Each such server is allocated its own area in RAM and hard disk space, its own network card, which increases the overall reliability of such a 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 fit his own needs with almost no restrictions.You can install any operating system: Linux, FreeBSD, Windows, and etc. But keep in mind that VPS configuration cann’t be changed and if you need to to increase your service, it will be need to setup another one VPS and then transfer data to new VPS.