Unit 47 IT Virtualisation
To provide learners with an understanding of the principles of virtualisation and the deployment of virtual server and desktop environments as a commercial or personal technology option.
· Unit abstract
As technology has evolved, the need to create virtual systems to simulate the behaviour of a real environment has become a primary objective. In having a virtual environment, an information technology professional may use virtualisation to plan a server deployment, test an application or operating system update, as well as test software created in a development environment.
The power of virtualisation has reached a stage where many commercial environments use virtualisation to run seemingly live arrays of servers to ensure redundancy, reliably, security and a lower cost of hardware ownership. It has become possible with the development of server virtualisation environments to have one hardware platform deliver many servers or remote workstations.
There are many hardware and software virtualisation solutions offered by different vendors. This unit allows the learner to access either desktop based virtualisation or server-based virtualisation, or possibly both. In delivery, there are many free to education as well as commercially available offerings.
Creating a virtualisation environment will require an understanding of the host system and its limitations as well as the requirements of the guest operating system. This unit will encourage the learner to explore how this may be accomplished and implement a viable system for commercial or personal use.
· Learning outcomes
On successful completion of this unit a learner will:
- Understand the commercial impact and potential of virtualisation
- Be able to design virtualisation deployments
- Be able to implement virtualisation deployments
- Be able to manage virtualisation environments.
1 Understand the commercial impact and potential of virtualisation
Scalability: methods eg simplicity of server addition, rapid deployment, rapid development
Redundancy: methods eg mirroring, server image backup, load balancing, reduction of points of failure
Support: centralisation of services, testing of resources
Environmental: server deployment; remote desktop; desktop; web based
Solutions: server based eg VMWare ESXi, ESX, Citrix; desktop based eg parallels, QEMU, virtual PC, VM-Ware Player, VMWare fusion
Technology: hypervisor; abstraction; virtual drivers; network connection eg NAT, bridged;
environments for developers; arrays of servers; cloud computing; server solutions; web servers
Cost: reduction of hardware cost of ownership; reduction of upgrade costs; larger platforms for many servers
2 Be able to design virtualisation deployments
Needs analysis: user requirement; corporate requirement; processor load assessment; storage; guest operating system requirement; host operating system requirement; solution needs eg application, development, testing, sandbox, interactivity
Hardware requirements: compatibility; storage availability; memory allocation eg host system, guest system, number of instances in use; processor capability; network bandwidth
Selection of virtualisation solution: eg server based, desktop based, free, commercial
Deployment image requirement: memory required for efficient operation; software eg applications to be installed, updates to be installed, antivirus; addressing eg conformance with host environment; operating system selection eg local need, application requirement
Environmental: interaction eg network addressing, access to local storage, access
to remote storage, user allocation, membership of directory services
3 Be able to implement virtualisation deployments
Implementation: tasks eg testing of updates, desktop users, alternate operating systems, sandbox
Virtualisation environment: installation eg hardware, environment software, registration of environment with host operating system, addressing of environment with network
Image environment creation: establishment of virtual storage requirements eg size, dynamic, fixed; establishment of base memory requirements; network communication; location of image
Image: installation eg from ISO, from remote image, pre-existing image, web install
Image adaptation: installation of updates; task specific software eg antivirus, applications, development environments
Testing: tasks eg producing documentation, system compatibility, hardware and software systems
4 Be able to manage virtualisation environments
User access: setting of virtual image privilege levels eg user, administrator, read rights, write rights, execution rights
Environment: testing eg access, usability, performance, compatibility
System: monitoring eg performance; memory use; speed; network access times; load and degradation on host environment
Update: maintain image;
installation/removal of features; virtual disk management
Learning outcomes and assessment criteria
|Learning outcomes On successful completion of this unit a learner will:||Assessment criteria for pass The learner can:|
|LO1 Understand the commercial impact and potential of virtualisation||evaluate current virtualisation solutionsdiscuss the potential benefits of virtualisationdiscuss the current technology requirements for implementing virtualisation|
|LO2 Be able to design virtualisation deployments||complete a needs analysis for a virtualisation deploymentdesign a virtualisation solution for a given virtualisation deployment|
|LO3 Be able to implement virtualisation deployments||maintain a virtualisation solutionsystematically test the virtualisation environmentdocument and analyse test results|
|LO4 Be able to manage virtualisation environments||monitor the virtualisation environmentmaintain a virtualisation environmentcritically review and analyse findings.|
Links to National Occupational Standards, other BTEC units, other BTEC qualifications and other relevant units and qualifications
The learning outcomes associated with this unit are closely linked with:
|Level 3||Level 4||Level 5|
|Unit 2: Computer Systems||Unit 48: IT Security Management|
|Unit 49: Digital Forensics|
This unit has links to the Level 4 and Level 5 National Occupational Standards for IT and Telecoms Professionals, particularly the areas of competence of:
- Disaster Recovery
- Availability Management.