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An Introduction to SaaS and Cloud Computing

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

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An Introduction to SaaS and Cloud Computing

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  1. An Introduction toSaaS and Cloud Computing Ross Cooney

  2. The hype Cluster Computing Cloud Computing Grid Computing 

  3. 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?

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

  5. SaaS Software as a Service

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

  7. SaaS Advantages • Pay per use • Instant Scalability • Security • Reliability • APIs

  8. SaaS Examples • CRM • Financial Planning • Human Resources • Word processing Commercial Services: • Salesforce.com • emailcloud

  9. PaaS Platform as a Service

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

  11. Popular services • Storage • Database • Scalability PaaS

  12. Advantages • Pay per use • Instant Scalability • Security • Reliability • APIs PaaS

  13. Examples • Google App Engine • Mosso • AWS: S3 PaaS

  14. IaaS Infrastructure as a Service

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

  16. Advantages • Pay per use • Instant Scalability • Security • Reliability • APIs IaaS

  17. Examples • Flexiscale • AWS: EC2 IaaS

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

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

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

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

  22. SaaS Risks • Security • Downtime • Access • Dependency • Interoperability PaaS IaaS

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