3.2 Virtualisation

Question 1

What is virtualisation?

Answer 1

Virtualisation is the creation of a virtual version of a device, software or server.

Question 2

What is a server and storage virtualisation ?

Answer 2

Server : When one physical server runs multiple virtual servers.

Storage : when multiple physical storage devices form one virtual storage device.

Question 3

What are virtualisation benefits and drawbacks?

Answer 3

A virtual client is a full desktop environment but processing happens via the hyper visor.

Benefits :
- hardware is more efficiently used
- cheaper as money is saved by not buying physical devices as well as less power consumption
- programmes can be tested before on main computer

Drawbacks :
- initial set up is complex and more technical knowledge is required
- if one single system fails, the impact will be greater
- fewer servers do more work so it may impact performance

Question 4

What is cloud technology and the three types?

Answer 4

Cloud technology is storage that is accessed through a network primarily the internet and is a form of virtualisation as storage is virtually held in an offsite location.

Three Types :

Private cloud : When a business has its own data centre that can be accessed by employees.

Public cloud : Uses a service providers such as Onedrive to provide storage over the internet.

Hybrid : A mix of private cloud and public cloud services. Businesses can move workloads between public and private cloud. More flexibility and data storage options.