An Introduction to SaaS and Cloud Computing Ross Cooney.

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Presentation transcript:

An Introduction to SaaS and Cloud Computing Ross Cooney

The hype Cluster Computing Cloud Computing Grid Computing

What is the cloud ? IT as a service Cloud allows access to services without user technical knowledge or control of supporting infrastructure Best described in terms of what happened to mechanical power over 100 yrs ago Now computers are simple devices connected to the larger cloud Data processing, storage and software applications that used to run locally are now being supplied by big central computing stations. They're becoming, in essence, computing utilities. What is Cloud Computing?

IaaS Infrastructure as a Service PaaS Platform as a Service SaaS Software as a Service

SaaS Software as a Service

Software delivery model Increasingly popular with SMEs No hardware or software to manage Service delivered through a browser SaaS

Advantages Pay per use Instant Scalability Security Reliability APIs SaaS

Examples CRM Financial Planning Human Resources Word processing Commercial Services: Salesforce.com cloud SaaS

PaaS Platform as a Service

Platform delivery model Platforms are built upon Infrastructure, which is expensive Estimating demand is not a science! Platform management is not fun! PaaS

Popular services Storage Database Scalability PaaS

Advantages Pay per use Instant Scalability Security Reliability APIs PaaS

Examples Google App Engine Mosso AWS: S3 PaaS

IaaS Infrastructure as a Service

Computer infrastructure delivery model Access to infrastructure stack: –Full OS access –Firewalls –Routers –Load balancing IaaS

Advantages Pay per use Instant Scalability Security Reliability APIs IaaS

Examples Flexiscale AWS: EC2 IaaS

Infrastructure as a Service PaaS Platform as a Service SaaS Software as a Service

Common Factors Pay per use Instant Scalability Security Reliability APIs IaaS PaaS SaaS

Advantages Lower cost of ownership Reduce infrastructure management responsibility Allow for unexpected resource loads Faster application rollout IaaS PaaS SaaS

Cloud Economics Multi-tenented Virtualisation lowers costs by increasing utilisation Economies of scale afforded by technology Automated update policy IaaS PaaS SaaS

Risks Security Downtime Access Dependency Interoperability IaaS PaaS SaaS