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An Introduction to
SaaS and Cloud Computing
Ross Cooney
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The hype
Cluster ComputingCloud ComputingGrid Computing
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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 over100 yrs ago
Now computers are simple devices connected to the larger cloud
Data processing, storage and software applications that used to runlocally are now being supplied by big central computing stations. They'rebecoming, in essence, computing utilities.
What is
Cloud Computing?
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IaaSInfrastructure as a Service
PaaSPlatform as a Service
SaaS
Software as a Service
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SaaS
Software as a Service
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Software delivery model
Increasingly popular with
SMEs No hardware or software to
manage
Service delivered through abrowser
SaaS
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Advantages
Pay per use
Instant Scalability Security
Reliability
APIs
SaaS
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Examples CRM
Financial Planning
Human Resources
Word processing
Commercial Services: Salesforce.com
emailcloud
SaaS
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PaaSPlatform as a Service
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Platform delivery model
Platforms are built upon
Infrastructure, which isexpensive
Estimating demand is not a
science! Platform management is not
fun!
PaaS
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Advantages
Pay per use
Instant Scalability Security
Reliability
APIs
PaaS
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Examples
Google App Engine
Mosso
AWS: S3
PaaS
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IaaSInfrastructure as a Service
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Computer infrastructuredelivery model
Access to infrastructure stack:
Full OS access
Firewalls
Routers
Load balancing
IaaS
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Advantages
Pay per use
Instant Scalability Security
Reliability
APIsIaaS
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Examples
Flexiscale
AWS: EC2
IaaS
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IaaSInfrastructure as a Service
PaaSPlatform as a Service
SaaS
Software as a Service
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Common Factors Pay per use
Instant Scalability Security
Reliability
APIsIaaS
PaaS
SaaS
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Advantages
Lower cost of ownership
Reduce infrastructuremanagement responsibility
Allow for unexpected resource
loads Faster application rollout
IaaS
PaaS
SaaS
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Cloud Economics
Multi-tenented
Virtualisation lowers costs byincreasing utilisation
Economies of scale afforded
by technology Automated update policy
IaaS
PaaS
SaaS
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Risks
Security
Downtime
Access
Dependency
InteroperabilityIaaS
PaaS
SaaS