Cloud ComputingTable of ContentsCloud Computing: A PrimerTable of ContentsCloud AdvantagesScalabilityTable of ContentsApplications for CloudsTable of ContentsDifferent Cloud ModelsUtility Computing ModelsUtility Computing ModelsUtility Computing ModelsTable of ContentsUtility Computing for ProfitReasons For Moving To The CloudFactors That Affect Transfer CostReferencesCloud ComputingPresentation by Michael CalvoPaper by M. Armbrust, A. Fox, R.Griffith, A.D. Joseph, et. al.Table of ContentsCloud Computing: A PrimerCloud AdvantagesScalabilityApplications for CloudsCloud ModelsUtility Computing ModelsReasons for Moving to the CloudUtility Computing for ProfitCloud Computing: A PrimerCloud: Refers unknown location of processing and related data.Operations of the system are abstracted.Table of ContentsCloud Computing: A PrimerCloud AdvantagesScalabilityApplications for CloudsCloud ModelsUtility Computing ModelsUtility Computing for ProfitReasons for Moving to the CloudFactors that Affect Transfer CostCloud AdvantagesDevice and location independence Sharing of resources and costs across a large pool of users thus allowing for:Centralization of infrastructure in locations with lower costs (such as real estate, electricity, etc.)Increased load capacity and system efficiency.Reliability due to multiple redundant sitesMaintenance of cloud computing applications is easier, because they do not need to be installed on each user's computer. They are easier to support and to improve, as the changes reach the clients instantly.Rapid and inexpensive reprovisioning results in scalabilityScalabilityTable of ContentsCloud Computing: A PrimerCloud AdvantagesScalabilityApplications for CloudsCloud ModelsUtility Computing ModelsUtility Computing for ProfitReasons for Moving to the CloudFactors that Affect Transfer CostApplications for Clouds Mobile interactive applicationsHighly available, rely on large data sets that are most conveniently hosted in large datacenters. Parallel batch processing Do 1000 work hours of a single computer in 1 hour with 1000 computers Extension of compute-intensive applicationsPossibility of running your entire OS off of the Cloud.Table of ContentsCloud Computing: A PrimerCloud AdvantagesScalabilityApplications for CloudsCloud ModelsUtility Computing ModelsUtility Computing for ProfitReasons for Moving to the CloudFactors that Affect Transfer CostDifferent Cloud ModelsThere are two types of clouds:Public Clouds – System is made available to Users via pay-as-you-go. Resource sold is called Utility Computing.Private Clouds – Internal datacenters of a buisness not made available to the public.Various levels of abstraction.Utility Computing ModelsHardware virtual machinesAble to control from the kernel upwards. Users are a 'thin' client.Downsides Difficult to provide automatic scalabilityEx. Amazon EC2Utility Computing ModelsApplication Domain Specific Clouds Focuses on internet application structureStateless computation vs. stateful storageDue to this enforced structure, it's easier for the system to automatically scale. DownsidesCloud needs to be designed to work for only that application.Ex. Google AppEngineUtility Computing ModelsMiddle GroundSupports general-purpose computing.Users get to choose what language the language the system recognizes, but don't control the OS or runtime.This means that users get some automatic network configuration and scaleability but requires at least some specifications by the developer. Ex. Microsoft AzureTable of ContentsCloud Computing: A PrimerCloud AdvantagesScalabilityApplications for CloudsCloud ModelsUtility Computing ModelsUtility Computing for ProfitReasons for Moving to the CloudFactors that Affect Transfer CostUtility Computing for ProfitReasons For Moving To The CloudDemand for a service varies over time Don't want to pay for cycles you're not using, but don't want to be unprepared for the peak hours.Demand is unknown in advanceDon't want to be unprepared.Calculating Computations faster1000 EC2 machines for 1 hour costs the same as using 1 machine for 1000 hours.Factors That Affect Transfer CostUsers want to pay seperately per resource. What rates will be the for CPU power? Storage? Bandwidth?Companies want to pay as little as possible for constructing these datacenters.Is there a location with cheap resources?Are the maintenance costs manageable?Hardware operational costs are very low.Software maintenance is expensive.ReferencesArmbrust, Michael, Armando Fox, Rean Griffith, Randy H. Katz, and Andrew Konwinski. "Above the Clouds: A Berkely View on Cloud Computing." EECS Journal at University of Berkerley. (2009):
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