This document discusses different types of cloud computing models including Software as a Service (SaaS), Infrastructure as a Service (IaaS), Platform as a Service (PaaS), colocation, managed hosting, and hosted applications. It provides advantages and disadvantages of each model. The document aims to explain how businesses can move applications and infrastructure to the cloud. It notes that cloud computing provides on-demand, scalable access to computing resources over the internet and is now widely used by individuals, businesses, non-profits and governments.

1. Byron K Patrick, CPA.CITP, CGMA, MCSE
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2. Today’s Objective
• To Explain how to get the “Cable” into the
“Cloud”
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3. What is Cloud Computing
• Many definitions!
• Model of enabling convenient, on-demand network access to shared
computing resources (e.g., networks, servers, storage, applications, and
services) that can be released with minimal service provider interaction.
• It is simply a classification, an add-on to:
• LAN, WAN, Grid, Etc…
• The “Cloud” is a metaphor for the Internet
• Data and applications now live in the internet
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5. Characteristics of Cloud Computing
• User Perspective
• Accessible from anywhere you have internet
• Minimal to no software to install
• Typically OS agnostic
• Work On Demand
• No Backups to worry about
• Scalable - Just add users and modules
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6. Characteristics of Cloud Computing
• Technical Perspective
• High Availability
• Typically web based
• Pooled Resources
• 5 nines
• Data Redundancy
• Scalable - Just add server resources
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7. Cloud Options?
• SaaS:
• Software as a Service
• IaaS:
• Infrastructure as a Service
• PaaS:
• Platform as a Service
• Colocation:
• Private Cloud
• Managed Hosting
• Public Cloud
• Hosted Applications:
• Outsourced Cloud
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8. Software as a Service (SaaS)
• Delivers software through the
internet, typically through a web
browser, avoiding the challenge of
installing and maintaining software at
the customers site.
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9. Characteristics of SaaS
ADVANTAGES DISADVANTAGES
Pay for only what you use Another login to remember
Easily Scalable Can’t use offline (some exceptions)
Automatic updates Data isn’t portable
Web/Browser based Customer owns nothing
No software to purchase
Subscription based
Customer owns nothing
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11. Infrastructure as a Service (IaaS)
• Provides a technical computer
infrastructure typically in the form of
virtualized servers. Servers are rented by
the customer and managed by the
customer
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12. Characteristics of IaaS
ADVANTAGES DISADVANTAGES
Complete Computing Environment Customer manages server operations
Underlying Infrastructure fully managed Customer requires technical expertise
Virtualized Infrastructure Customer owns software
Scalable
Pay per use
Customer owns data
Customer doesn’t own servers
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14. Platform as a Service (PaaS)
• Provides a computing platform to
facilitate deployment of typically SaaS
application by limiting the challenges and
cost of managing the underlying
hardware and software foundation.
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15. Characteristics of PaaS
• A service used for software programmers to
develop web applications
• Software Platform is provided and managed
• Programmers plugin their code and focus on
their application rather than the challenges
associated with managing the software
components:
• Servers
• Databases
• Bandwidth
• Etc
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17. Colocation
• A service where server racks, equipped
with power, cooling, and bandwidth are
rented on a monthly basis. Colocation
eliminates the need to build and
maintain a server room and all of its
complexities.
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18. Colo Features
ADVANTAGES DISADVANTAGES
Highly Secure – Physically Requires the technology experts in-house
or consultants
High Availability Infrastructure:
• Internet, Power, Cooling Requires some sort of remote access
technology
On-site monitoring
Customer owns software
Computer hardware sensitive fire
prevention Customer owns hardware
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19. Colocation
• Rent rack space in a datacenter
• DataCenter Classifications
• Tiers
• Tier 1 – Server Closet
• Tier 2 – Office Data Center
• Tier 3 – Enterprise Datacenter
• Tier 4 – Armed Guards
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20. A Datacenter Tour
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22. Managed Hosting
• The benefits of IaaS combined with the
technical expertise of a managed
services provider, effectively IaaS with an
IT Department.
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23. Managed Hosting
ADVANTAGES DISADVANTAGES
Complete Computing Environment Customer owns some software
Underlying Infrastructure Fully Managed
Server Operations Fully Managed
Fully Virtualized
Scalable
Subscription Based
Can be OS agnostic
99% of non-SaaS applications can be
supported
Licensing benefits with the right providers
Customer owns data
Customer doesn't own servers
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25. Hosted Applications
• Applications that are not natively
designed as SaaS applications however in
their nature can easily be supported by
and outside service provider.
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26. Hosted Applications
• Non-SaaS Applications
• Popular Examples:
• Phone Systems
• Microsoft Exchange
• SharePoint
• QuickBooks
• Web Security
• Creative Solutions Virtual Office
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28. Who is using it?
• Home Users
• Businesses
• Non Profits
• Government
• Everyone
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29. Questions or Comments?
• Byron K Patrick, CPA.CITP, MCSE 2003
• 443.850.7918
• bpatrick@goapps.us
• www.SimplifiedInnovations.com
• byron_cpa
• http://www.linkedin.com/in/byronpatrick
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