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Cloud Computing

ByRoushan Kumar

Department Of Computer Engg.

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IndexIndexIntroductionWhat is cloud

How do they workTerms related with cloud computingIts utility

Cloud MythologiesCommercial cloudCloud Anatomy & LayersCloud Characteristics

Cloud for DevelopersOpen source cloud infrastructure & EcosystemtoolPerformance & Open InnovationCloud Articles

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Introduction:

Introduction:

D ynamic provision of services/resource pools in a co-ordinatedfashion

On demand computing No waiting periodLocation of resource is irrelevant

Applications run somewhere on the cloudWeb applications fulfill these for end user However, for application developers and IT

Activate, retire resources

D ynamically update infrastructure elements without affectingthe business

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Individuals Corporations Non-Commercial

Cloud Middle WareStorage

Provisioning

OS

Provisioning

Network

Provisioning

Service(apps)

Provisioning

SLA(monitor),

Security, Billing,Payment

Services Storage Network OS

Resources

What is Cloud:What is Cloud:

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How do they work:How do they work:P ublic clouds are opaque

What applications will work well in a cloud?Many of the advantages offered by P ublic Cloudsappear useful for on premise IT

Self-service provisioningLegacy supportFlexible resource allocation

What extensions or modifications are required to

support a wider variety of services and applications?D ata assimilationMultiplayer gamingMobile devices

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Cloud ComputingCloud Computing - - Some terms:Some terms:Term cloud is used as a metaphor for internetConcept generally incorporates combinations of the following

Infrastructure as a service (Iaas)P latform as a service ( P aas)Software as a service(SaaS)

Not to be confused withGrid Computing a form of distributed computing

Cluster of loosely coupled, networked computers acting inconcert to perform very large tasks

Utility Computing packaging of computing resources suchas computing power, storage, also a metered services

Autonomic computing self managed

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G rid ComputingG rid Computing :

Share Computers and dataEvolved to harness inexpensive computers in D ata center tosolve variety of problemsHarness power of loosely coupled computers to solve atechnical or mathematical problem

Used in commercial applications for drug discovery, economicforecasting, seismic analysis and back-officeMost financial firms has grids like thisGrids lack automation, agility, simplicity and SLA guarantees

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U tility Computing:

More related to cloud computing Applications, storage, computing power andnetwork

Requires cloud like infrastructureP ay by the drink model

Similar to electric service at homeP ay for extra resources when needed

To handle expected surge in demandUnanticipated surges in demand

Better economics

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Cloud Mythologies:

Cloud computing infrastructure is just a web service interface tooperating system virtualization.Cloud computing imposes a significant performance penalty

over bare metal provisioning.Clouds and Grids are equivalent

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Commercial clouds:

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Cloud Anatomy:Cloud Anatomy: ApplicationServices(services ondemand)

Gmail, GoogleCalender P ayroll, HR, CRM etc

P latform Services (resources

on demand)Middleware, Integration,Messaging, Information,connectivity etc

AWS, IBM Virtualimages, Boomi, Cast-Iron, Google Apennine

Infrastructure asservices(physical assets asservices)

IBM Blue house,VMWare, Amazon EC2,Microsoft Azure P latform,

Sun P arascale and more

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Cloud Computing Layers:Cloud Computing Layers:

Layers Architecture

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Cloud Computing Characteristics:Cloud Computing Characteristics: Agility On demand computing infrastructure

Linearly scalable challengeReliability and fault tolerance

Multi-tenancy Several customers share infrastructure, withoutcompromising privacy and security of each of the customersdataService-oriented compose applications out of loosely coupledservices. One service failure will not disrupt other services.Expose these services as A P IsVirtualized decoupled from underlying hardware. Multipleapplications can run in one computer

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Public, Private & Hybrid Class:Public, Private & Hybrid Class:

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Clouds for Developers:Clouds for Developers:

Ability to acquire, deploy, configure and host environmentsP erform development unit testing, prototyping and full producttesting

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Open Source Could EcosystemOpen Source Could Ecosystem- -Tools:Tools:

Right ScaleStartup focused on providing client tools as SaaS hosted in

AWSUses the REST interface

CanonicalUbuntu 9.10 (Karmic Koala)Includes KVM and Xen Hypervisors

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Clouds and Virtualization:Clouds and Virtualization:Operating System virtualization (Xen, KVM, VMWare, HyperV)is only apparent for IaaS

AppEngine = BigTableHypervisors virtualize C P U, Memory, and local device access asa single virtual machine (VM)

IaaS Cloud allocation isSet of VMsSet of storage resourcesP rivate network

Allocation is atomicSLA

Monitoring

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Cloud Performance:Cloud Performance:

Extensive performance study using H P C applications andbenchmarksTwo questions:

Performance impact of virtualizationPerformance impact of cloud infrastructure

Observations:Random access disk is slower with XenCP U bound can be faster with Xen -> depends onconfigurationKernel version is far more important

No statistically detectable overhead AWS small appears to throttle network bandwidth and(maybe) disk bandwidth -> $0.10 / CPU hour

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Cloud Infrastructure

Network operationscenter

Physical Infrastructure

P hysical Security

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Clouds open for Innovation:

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Cloud Articles:

http://blogs.zdnet.com/Hinchcliffe/?p=488&tag=btxcsimhttp://blogs.zdnet.com/Howlett/?p=558&tag=btxcsimhttp://blogs.zdnet.com/BTL/?p=9560&tag=btxcsim

http://www.businessweek.com/technology/content/aug2008/tc2008082_445669_page_3.htmhttp://www.ibm.com/developerworks/websphere/techjournal/0904_amrhein/0904_amrhein.htmlhttp://cloudcomputing.sys-con.com/

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Thank You!Thank You!