You are wishing to use the virtual server service, the VNSO will help you learn the knowledge related to virtual servers VPS-is one of the first tasks you need to do.
Today, with the development of information technologies and the optimization of the search engine makes, receiving the knowledge related to the server VPS became something much more simple. However, the users and the people who care don't know where's the reliable source or can determine the accuracy of the information service.
With many years of activity in the field of the server, server, server rental, Server virtual server set and recently more VNSO technology Cloud VPS, Smart server, is one of the reputable service providers, top quality Vietnam so we understand about VPS or Server services in a most profound way. In this article we will introduce essential about VPS, more important is the tutorial check VPS are active on any virtualization platform with just a few simple commands.
Distinguish and choose VPS.
Virtual Server (VPS-Virtual Private Server) is a server that was created by Division 1 physical server into many different server properties as a separate server, run as a shared resource from the original physical server. Virtual server is created by virtualization technologies, depending on the virtualization technology would be using virtual servers which have the properties share different resources.
When you specify will use VPS instead of Shared Hosting and when you find that understanding, there are many types of different VPS VPS Linux VPS, Windows VPS, OpenVZ, Xen VPS, VMWareVPS ... then you start to panic not knowing how they differ, they are pros, cons, choose one to fit your needs?
Classified information on OpenVZ, Xen or VMWare is virtualization technology (Virtual Platform) that VPS service provider used to divide 1 physical server into different virtual servers, each technology has pros demerits are as follows.
OpenVZ (Open Virtuozzo) is a system-level virtualization technology based on the Linux kernel. OpenVZ allows a physical server to run multiple operating system instances, known as container, virtual private servers (VPSS), or virtual environments (VES).
OpenVZ virtualization, it's really not used 1 Linux kernel was modified and therefore can only run the Linux operating system only, so all virtual servers VPS also can only run Linux with shared technology and Kenel version. However, since no human should own it very fast and efficient, but that is also its downside when all the servers must use the same unique personalities.
The downside of OpenVZ is the memory allocation is not separated, that is, memory that is allocated for this VPS server 1 can be used by other VPS in case the other VPS requires. It also uses a shared file system, so the threat is in fact just a VPS directory change root. The new version of OpenVZ allows each VPS can have its own file system itself. With the "virtualized" folder into VPS so, can copy 1 VPS by copy folder, and then change the appropriate configuration and start it up as a new VPS.
XEN virtualization technology is actually allowed to run at the same time many virtual servers VPS on 1 physical server.
The XEN virtualization technology allows each virtual server runs its own personality, so can be installed both Linux VPS or Windows Operating system, each VPS has its own File system operations such as 1 physical server independent.
Resources provided for XEN VPS servers are also independent, meaning that each server XEN are level 1 the amount of RAM, CPU and Disk, it ensures that your VPS server will be provided with sufficient resources as at registration with the service provider. Due to the XEN technology requires full physical resources per VPS, so that the service provider must also strengthen physical resources on the host VPS servers, resulting in real use XEN technology is often more expensive technologies of OpenVZ
VMWare virtualization technology developed by VMWare, it supports virtualization from the hardware level. This technology is often applied to large companies such as banks, and little-used for commercial sale VPS.
KVM (Kernel-based Virtual Machine).
KVM is virtualization technology allows new virtualization really on the hardware platform. Thus the server KVM like XEN are provided private resources to use, avoiding the disputed resources with other servers on the same node. The root servers are installed Linux, but the KVM supports virtual server creation can run Linux, Windows. It also supports both x 86 and x 86-64 system.
Not have official statistics on the advantages of KVM vs. XEN, XEN, however, developed before the KVM about 10 years so that it can be improved, while the KVM is the new development should be receptive to newer technologies and avoid mistakes. Therefore, the choice of VPS running XEN or KVM is depending on your preferences as well as the prestige of hosting providers.
Software installation check.
- The operating system platform On RHEL/CentOS: yum-y install virt-what
- The operating system platform On RHEL/CentOS to run the following command: Sudo apt-get install virt-what
Run the test command.
- Use the command: virt-what
The results will correspond with the virtualization platform:
- If VPS is OpenVZ then results: OpenVZ
- If VPS is KVM then results: KVM
- If VPS is XEN, we are one of the following results: xen xen or-domO or xen-domU xen-hvm or depending on the XEN virtualization technology.
- If vmware is the results: vmware.