What is Virtualisation
Virtualisation is a proven software technology that makes it possible to run multiple operating systems and applications on the same server at the same time. It’s transforming the IT landscape and fundamentally changing the way that people utilize technology.
Benefits of Virtualisation
Virtualisation can increase IT agility, flexibility, and scalability while creating significant cost savings. Workloads get deployed faster, performance and availability increases and operations become automated, resulting in IT that’s simpler to manage and less costly to own and operate.
- Reduce capital and operating costs.
- Deliver high application availability.
- Minimize or eliminate downtime.
- Increase IT productivity, efficiency, agility and responsiveness.
- Speed and simplify application and resource provisioning.
- Support business continuity and disaster recovery.
- Enable centralized management.
- Build a true Software-Defined Data Center.
VMware’s industry-leading platform supports all levels of virtualisation, from desktop and server virtualisation to a full-fledged Software-Defined Data Center.
What is virtualisation? Simply put, it’s the process of creating a virtual, rather than physical, version of something. Virtualisation can apply to computers, operating systems, storage devices, applications, or networks. However, server virtualization is at the heart of it.
IT organizations are challenged by the limitations of today’s x86 servers, which are designed to run just one operating system and application at a time. As a result, even small data centers have to deploy many servers, each operating at just 5 to 15 percent of capacity—highly inefficient by any standard.
Virtualisation uses software to simulate the existence of hardware and create a virtual computer system. Doing this allows businesses to run more than one virtual system – and multiple operating systems and applications — on a single server. This can provide economies of scale and greater efficiency.
The Virtual Machine
A virtual computer system is known as “virtual machine” (VM): a tightly isolated software container with an operating system and application inside. Each self-contained VM is completely independent. Putting multiple VMs on a single computer enables several operating systems and applications to run on just one physical server, or “host”.
A thin layer of software called a hypervisor decouples the virtual machines from the host and dynamically allocates computing resources to each virtual machine as needed.
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