• “Cloud” is actually a metaphor for the Internet.• Cloud computing is a paradigm in which information is permanently stored in servers on the Internet.
The cloud is a large group ofinterconnected computers.It is a document-centric concept not PCcentric.
History of Cloud Computing Concept dating back to the 1960’s by John McCarthy, acomputer scientist, brought up the idea that "computation maysomeday be organized as a public utility” Idea that revolutionized Cloud Computing: Moving fromclustering computing to grid computing –Clustering –Grid“In some ways, the cloud is a natural next step from the grid-utility model,” said Frank Gens, an analyst at the research firmIDC
SERVICE MODELSCloud computing provides three service according to fundamental models. –Infrastructure as a Service –Platform as a Service –Software as a Service
IaaS- Infrastructure as a ServiceDefined as delivery of computer infrastructure as a service Fully outsourced service so businesses do not have to purchase servers, software or equipmentInfrastructure providers can dynamically allocateresources for service providers Service providers offer this service to end users Allows cost savings for the service providers, since they do not need to operate their own datacenter
PaaS- Platform as a ServiceProvides all the facilities necessary to support thecomplete process of building and delivering web applicationsand services, all available over the internetInfrastructure providers can transparently alter theplatforms for their customers’ unique needs
SaaS- Software as a ServiceDefined as service-on-demand, where a provider willlicense software tailoredInfrastructure providers can allow customers’ to runapplications off their infrastructure, but transparent to theend user Customers can utilize greater computing power while saving on the following –Cost –Space –Power Consumption –Facility
PUBLIC CLOUDApplications, storage, and other resources are made available to the general public bya service provider. Public cloud services may be free or offered on a pay-per-usagemodel.PRIVATE CLOUDPrivate cloud is infrastructure operated solely for a single organization, whethermanaged internally or by a third-party and hosted internally or externallyHYBRID CLOUDHybrid cloud is a composition of two or more clouds (private, public etc.) that remainunique entities but are bound together, offering the benefits of multiple deploymentmodels.
ROLESProviderA cloud computing provider or cloud computingservice provider owns and operates live cloudcomputing systems to deliver service to thirdparties.UserA user is a consumer of cloud computingVendorA vendor sells products and services that facilitate the delivery, adoption anduse of cloud computing.
ConclusionCloud Computing Brings Possibilities……..Increases business responsivenessAccelerates creation of new services via rapid prototyping capabilitiesReduces energy consumptionHandles new and emerging workloadsScales to extreme workloads quickly and easilySimplifies IT managementPlatform for collaboration and innovationCultivates skills for next generation workforce
FUTURE ENHANCEMENTSSecurity is a major concern for cloud computing, as it is for any new technologyorganizations need to take the time to properly identify the data and workloadsthat require a higher degree of resiliency, isolation and control.The external nature of public clouds brings additional concerns about loss ofcontrol and sharing data outside the firewall.