1.
The Cloud
(as I explained
to my friend)
Allen Prattis

2.
SaaS (Software as a Service)
 Allowing
users to access specific
applications on-line
 Advantage

Charge on a subscriptions basis
 Disadvantage

Generic applications may not work

3.
PaaS (Platform as a Service)

Provide environment to allow for users to create their own
web applications


Azure – Microsoft
App Engine – Google


Force.com – SalesForce


Pros




Build and Run one application for Free
RAD (rapid application development)
Private or public deployment
Cons

Build and Run one application for Free
Limits developers to tools provided by the PaaS developer
Risk of Vendor lock in

4.
Iaas (Infrastructure as a
Service)



Allow business to run whatever applications
that the business has to a cloud supplier’s
hardware
Migrate applications to the suppliers
hardware
Physical or virtual servers


Virtualization – allow for suppliers to share
physical servers
Pros

Lower IT costs

5.
IaaS Types

Private Cloud


Dedicated Hosting



Customer rents physical servers on demand
Cost and numbers of servers matching their demand
Hybrid Hosting


Most secure and costly
Mix of physical and virtual servers are hosted on
demand of the customer to reduce costs and increase
flexibility
Cloud Hosting

Customer rents virtual servers on demand and often on
an hourly basis

6.
IaaS Vendors
 Amazon


Web Services
Offers many options
Preconfigured software from
Oracle, IBM, etc
 Rackspace

Private cloud to Cloud Hosting
 GoGrid

Cloud hosting, Hybrid hosting, Dedicated
hosting