VIRTUALISATION

VIRTUALISATION

1. definition

   • create a simulated, virtual computing environment

2. benefits

   • increase efficiency
   • reduced cost
   • reduce downtime
   • scalability
   • easier backup
   • better testing

3. challenges

   • depleted resources and performance
   • additional costs
   • overrun storage network
   • network congestion
   • management complexity

4. drawbacks

   • complex infrastructure
   • dynamic design
   • quick moving workloads
   • no effective security for virtual servers
   • vulnerable to cyber attacks

5. hypervisors

   • definition
     • computer software to create a virtual machine
   • types
     • type 1
       • installed directly on top of the physical server
       • eg. KVM, VMWARE, ESXi, HYPER-V
     • type 2
       • runs inside of an OS of a physical host machine
       • eg. VirtualBox, Virtual PC, Parallel Desktop

6. benefits of cloud computing and virtualisation

   • speedy recovery time
   • easier management
   • better scalabity
   • less carbon impressions i.e. green friendly computing
   • agile business process