Server Virtualization
Many organizations adopted the best practice of deploying one server with one operating system and one application to keep pace with every growing storage and processing demands
For quite a long time in IT history, many organizations adopted the best practice of deploying one server with one operating system and one application to keep pace with every growing storage and processing demands.
Aside from high operating costs and massive inefficiencies, the software and hardware vendors are requesting the organizations to upgrade their systems for compatibility, when the operating system (such as Windows Server) gets new versions released. Deployment and maintenance of mission-critical systems then is truly a nightmare for IT personnel. They can only execute service maintenance tasks during holidays or odd hours. While unexpected incidents, such as hardware failure, virus attacks, etc., happen, the management and users are eyeing on them for the restoration of service
What is the
Server Virtualization ?
Conventional Computing Infrastructure
Virtualized Computing Infrastructure
Server virtualization relies on software to simulate hardware functionality and create a virtual computer system. The virtualization software (commonly known as “hypervisor”) enables IT organizations to run more than one virtual system (widely known as “virtual machine”) – and multiple operating systems and applications – on a single physical server, or “host”.
A virtual machine is a tightly isolated software container that can run its own operating systems and applications as if it were a physical computer. A virtual machine behaves exactly like a physical computer and contains its virtual CPU, RAM, hard disk, and network interface card. The “hypervisor” decouples the virtual machines from the host and dynamically allocates computing resources to each virtual machine as needed.
Benefits of Server Virtualization
Hardware Independence
- Provision or migrate any virtual machine to any physical server - Break hardware and software dependency interloc
Isolation
- Enhance security by providing a layer of isolation - Improved reliability by isolating application from each other
Partitioning
- Run multiple operating systems on one physical server - Divide system resources between virtual machines
Encapsulation
- Save the entire state of a virtual machine to files - Move and copy virtual machines as easily as moving and copying files