IFB102 Lecture Notes - Lecture 8: Data Center, System Administrator, Utility Computing
Document Summary
Lecture 8 - cloud, mobile computing & internet of. It is a abstraction for the complex infrastructure it conceals: new versions of old idea asp (application service provision, cloud computing useful for businesses and consumers, affects mainframes, pcs and mobile devices. But what is the cloud: traditional computing model, application, operating system and hardware. Software as a service (saas) - a provider licenses an application to customers for use as a service on demand. Google app engine build scalable applications no systems administration. Infrastructure as a service (iaas) - rather than purchasing servers, data centre space or network equipment, clients instead buy those resources as a fully outsourced service. Virtual machines: emulated and isolated cpu which can run different operating systems and applications as any normal cpu can. Supported by a hypervisor: a combination of hardware (special cpu machine instructions) and software: virtual machines can be moved from one hypervisor on one machine to another, e. g.
