CLOUD COMPUTING

Shayan Zamani

University of Science and Technology Mazandaran, Babol

Sh.zamani@ustmb.ac.ir

07 Jan 2010

Seminar of “Virtual Machines” course

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Outline

Motivation• What is Cloud Computing?• Why Cloud Computing?• Cloud Computing Services• Cloud Computing Service Providers• Types of Clouds• Virtualization in Cloud Computing

Compare Cloud Computing & Grid Computing Advantages & DisadvantagesConclusion

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What is Cloud Computing?

Cloud Computing offers the ability to access software or information that can be delivered on-demand over the internet ,without the need to store it locality [1,3,4].

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Why Cloud Computing?If you use online photo storage or word processing or online e-mail or an online spreadsheet or online data storage or any other internet-based application, you use “Cloud Computing” [5].

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Cloud’s Services

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Software as a Service (SaaS): Any web application is a Cloud application service in the sense that it resides in the Cloud[4,6].

• Google• Amazon• Facebook• Twitter• Flickr

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Cloud’s Services(Cont’d)

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Platform as a Service (PaaS): One step up from pure utility computing are Cloud platform services, which hide virtual machine instances behind higher-level APIs[4,6].

• Google Apps• Google AppsEngine• Salesforce’s force.com

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Cloud’s Services(Cont’d)

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Infrastructure as a Service (IaaS): Provides raw virtual machine instances, storage, and computation at pay-as-you-go utility pricing, and is currently the leading provider in this category[4,6].

•Amazon Elastic Compute Cloud(EC2)•Amazon Simple Storage Service(S3)

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Cloud’s Service Providers

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Types of Clouds

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There are three types of clouds[1]:

• Private Clouds• Public Clouds• Hybrid Clouds

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Virtualization in Cloud

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• Virtualization refers primarily to platform virtualization, or the abstraction of physical IT resources from the users and applications using them[6].• Virtualization allows servers, storage devices, and other hardware to be treated as a pool of resources rather than discrete systems[6].• Virtualization is used to, physical resources into multiple virtual sources and logic are, as more users can simultaneously use the resources[6].

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Virtualization in Cloud(Cont’d)

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Virtualization Benefits

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• Higher Utilization Rates: Workloads can be encapsulated and transferred to idle systems[6].

• Lower Power Usage/Costs: Using virtualization to consolidate makes it possible to cut total power consumption and save significant costs[6].

• Space Savings: Virtualization can alleviate the strain by consolidating many virtual systems onto fewer physical systems[6].

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Cloud’s Stack Model

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Compare Clouds & Grids

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• Architecture:

Cloud Grid

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Compare Clouds & Grids(Cont’d)

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Compare Clouds & Grids(Cont’d)

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Cloud’s advantages

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• Computer costs less

• Developed performance

• Software costs less

• Rapid and permanent improvement software

• More compatible format documents

• Unlimited storage capacity

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Cloud’s advantages(Cont’d)

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• More reliability data

• Global access to documents

• Having latest version

• Group cooperation easier

• Independent of hardware

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Cloud’s disadvantages

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• Need a permanent connection to the Internet

• With low speed Internet connection is not working

• Can be slow

• Features may be limited

• The data stored may not be adequate security

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Conclusion

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In summary, we can say that cloud computing model to process the huge volume of information that benefits due to its high computational model as most internet and computer world are discussed.

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References

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[1] B.P.Rimal, E.Choi, I.Lumb, ” A Taxonomy and Survey of Cloud Computing Systems”, in Fifth International Joint Conference on INC, IMS and IDC(NCM '09), 25-27 Aug. 2009.[2] B.R.Kandukuri, V.R.Paturi, A.Rakshit, “Cloud Security Issues”, in IEEE International Conference on Services Computing(SCC '09), 21-25 Sept. 2009.[3] I.Foster, Zh.Yong, I.Raicu, S.Lu, “Cloud Computing and Grid Computing 360-Degree Compared”, in Grid Computing Environments Workshop(GCE '08), 12-16 Nov. 2008.[4] P.C.Y.Sheu, W.Shu, W.Qi, H.Ke, R.Paul, “Semantic Computing, Cloud Computing, and Semantic Search Engine”, IEEE International Conference on Semantic Computing(ICSC '09), 14-16 Sept. 2009.[5] S.AjayKumar, C.Nachiappan, K.Periyakaruppan, P.Boominathan, “Enhancing Portable Environment Using Cloud and Grid”, in International Conference on Signal Processing Systems, 15-17 May 2009.[6] T.C.Chieu, A.Mohindra, A.A.Karve, A.Segal, “Dynamic Scaling of Web Applications in a Virtualized Cloud Computing Environment”, in IEEE International Conference on e-Business Engineering(ICEBE '09), 21-23 Oct. 2009.

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