Virtual Private Servers (VPS) use hypervisors to supply bare-metal or OS-level virtualization for hardware partitions to form more efficient use of web server resources during a data center.
“Bare-metal” or Type-1 hypervisors are considered to supply better data isolation for security in file storage and can permit a choice of Linux, Windows, BSD, etc. on the OS. Type-2 or “hosted” hypervisors replicate virtualization at the OS kernel level and are used with many managed VPS or cloud hosting plans.
There are numerous open-source Linux virtualization platforms supported KVM, while Microsoft has Hyper-V with Windows cloud servers, Citrix maintains the Xen server framework, and VMware features a number of various hypervisor frameworks like ESXi. Hypervisors permit the managing of multiple web servers independently on shared hardware each with isolated databases, file storage, and I/O request processing.
“VPS web hosting plans are considered a performance upgrade between shared hosting and dedicated servers”
OpenStack, Apache Mesosphere, and CloudStack are samples of open source cloud orchestration platform software that will be used with virtualization during a data center to create enterprise solutions.
VMware, Microsoft, Parallels, Citrix (Xen Server), IBM (Bluemix), & Red Hat (OpenShift) are all leading in providing enterprise data center solutions supported VPS networks under proprietary software licensing agreements. VPS web hosting plans are considered a performance upgrade between shared hosting and dedicated servers, where elastic web server frameworks like AWS E2 and Kubernetes also make extensive use of VPS/VM partitions in cloud architecture.
VPS hosting plans allow web developers and programmers to make custom server stack software environments for web/mobile application support in production. VPS hosting plans also offer realtime web traffic and system resource monitoring tools for systems administrators.
VPS plans are currently available in configurations more powerful than many dedicated server web hosting plans. VPS partitions are used extensively within the largest corporate cloud data centers within the world.
Operating System virtualization permits the creation of isolated VM environments which will be used as web servers with better security, network traffic monitoring, and resource allocation than both shared & dedicated servers normally provide.
Operating System virtualization refers primarily to Type-2 hypervisors like KVM or platforms like OpenVZ & Virtuozzo that share the Linux kernel (+ drivers) between partitions on an equivalent web server hardware. this type of VPS is common in managed cloud plans where the online hosting company provides a custom web server stack software like LAMP/LEMP pre-installed on a VM partition. Multiple customers can share one dedicated or rackmount server with better security, file isolation, database, and programing language extension support than shared hosting provides, also as having access to a better level of web server resources when processing scripts like PHP, Python, or Node.js code. Some sorts of OS virtualization also will permit Windows, Linux, & BSD to be installed on equivalent physical hardware.