Behind every Cloud is a Silver Lining

William MensahCs 75711/25/2009

OutlineIntroduction

What is Cloud ComputingHistory

Architectural Layers & Cloud ServicesSoftware as a ServicePlatform as a ServiceInfrastructure as a Service

Types of CloudsWhy migrate to the Cloud?EffectivenessIssues & ConcernsConclusion

IntroductionWhat is Cloud Computing

“Cloud Computing is a paradigm in which information is permanently stored in servers on the internet and cached temporarily on clients that include desktops, entertainment centers, table computers, notebooks, wall computers, hand-helds, sensors, monitors, etc.” - 2008 IEEE Internet Computing

“A network that distributes processing power, applications and large systems among many computers” – Maggiani Rich, IEEE

“ability to rent a server or a thousand servers and run a geophysical modeling application on the most powerful systems available anywhere in the world” – Sun Microsystems

it’s a way to access files and services outside of one’s own space, over the Internet

HistoryConcept has existed since the 60s

The term ‘Cloud’ originates from telecommunications world of 1990s

John McCarthy – proposed the idea of computation being delivered as a public utility

Ramnath K. Chellappa – first academic definitiona computing paradigm where the boundaries of

computing will be determined by economic rationale rather than technical limits

HistoryPhases:

Supercomputer Single machine with many processors plugged into it

Cluster computing Collection of many smaller machines, each with a

few number of processors and independent memory

Grid computing Expands techniques of clustering but computers that

form the grid are pooled from different administrative domains and applied to a common task

OutlineIntroduction

What is Cloud ComputingHistory

Architectural Layers & Cloud ServicesSoftware as a ServicePlatform as a ServiceInfrastructure as a Service

Types of CloudsWhy migrate to the Cloud?EffectivenessIssues & ConcernsConclusion

ArchitectureMost of the infrastructure consists of reliable

services delivered through data centers that are built on servers with different levels of virtualization technologies

Open standards and open software are critical to the growth and survival of Cloud computing.

Architectural Layers & ServicesSoftware as a ServicePlatform as a ServiceInfrastructure as a Service

Architectural Layers & ServicesSoftware as a Service (SaaS)

Term was coined by John Koenig in 2005Software application delivery model where the

vendor develops and operates the software application for use by its customers via the internet

Architectural Layers & ServicesPlatform as a Service (PaaS)

Provision of an environment that supports the life cycle of web-application development available over the internet Design Implementation Testing Deployment Hosting

Architectural Layers & ServicesInfrastructure as a Service (IaaS)

Delivery of basic storage and computing capabilities as standardized services over the internet. Provides:

Software Memory Data center space Storage

OutlineIntroduction

What is Cloud ComputingHistory

Architectural Layers & Cloud ServicesSoftware as a ServicePlatform as a ServiceInfrastructure as a Service

Types of CloudsWhy migrate to the Cloud?EffectivenessIssues & ConcernsConclusion

Types of CloudsPublic

External (3rd party provider)

PrivateInternal

HybridBoth

Role PlayersCloud Providers

Provide infrastructure to SaaS providers and Cloud users Amazon Salesforce.com

SaaS Providers/Cloud UsersCompanies and web application developers that make

use of resources made available to them by Cloud Providers

SaaS UsersNaïve end-users. Have little or no knowledge about

what goes on behind the Clouds.

Why migrate to the Cloud?Pay-per-use model

Only pay for what you use

Low cost of rentingAmazon Scalable Service (S3) charges $0.12 to

$0.15 per gigabyte per month

Reduce runtime and response timeSplit operations among multiple computing

nodes

Why migrate to the Cloud?Security

Advanced encryption algorithms

TransparencyJust use the services, cloud maintenance is for

the providers to worry about

Effectiveness of Cloud ComputingNew York Times’ TimesMachine

Convert articles from 1851 – 1922 to PDF formatCould have taken 7 weeks but with cloud

computing technology, project was completed in 24 hours.

Animoto Scaled easily from 50 to 3500 servers in just 3 days

MapReduceDivide and conquer method is distributed across

multiple computers.

OutlineIntroduction

What is Cloud ComputingHistory

Architectural Layers & Cloud ServicesSoftware as a ServicePlatform as a ServiceInfrastructure as a Service

Types of CloudsWhy migrate to the Cloud?EffectivenessIssues & ConcernsConclusion

Issues & ConcernsReliability

Will the system be available all the time?January 2009: 40-minute outage at

Salesforce.com Affected over 900,000 subscribers

PortabilityAre services (business applications etc) and

data available from anywhere?

Issues & ConcernsPrivacy & Security

Who has access to what resourcesWhat happens to your private data if

You fail to pay your bills and your account is terminated?

Government prompts your cloud provider for it?

ConclusionCloud computing is here to stay

There still exists the possibility of a single point of failure, but probability of a failure is low because of how well the infrastructure is implemented.

It’s ability to expand and contract on demand makes it very ideal for businesses

http://www.youtube.com/watch?v=EzE6haADxRc&feature=player_embedded

Questions / Comments

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