Cloud computing is a pay-per-use model that provides on-demand access to configurable computing resources like servers, storage, databases, networking, software, analytics and more over the internet. It enables convenient, on-demand network access to a shared pool of configurable computing resources that can be rapidly provisioned and released with minimal management effort or service provider interaction.

1. Definitions of Cloud Computing
Cloud computing is a pay-per-use model for
Clouds are hardware-based services
enabling available, convenient, on-demand
offering compute, network and storage capacity where:
accessto a shared pool of configurable
computing resources that can be rapidly
▪ Hardware management is highly abstracted from the buyer
provisioned and released with minimal
▪ Buyers incur infrastructure costs as variable OPEX
management effort or service(up or down)
▪ Infrastructure capacity is highly elastic
provider
interaction.

2. Quotes
“Cloud computing has the potential to create
irreversible changes in how computers are used
around the world”
“Cloud computing technology’s objective is to move
any application stored on a computer to a
remote location, eliminating all the standard
components, including operating systems and
hard drives, which are necessary in today’s
computers and make them accessible online
through a standard browser. “

3. Simple Cloud Definition
Resources
As A
Commodity

4. That’s 3 servers, 15
licences, 4 routers, 2
networks….
Do you have an
online webshop
for me?

5. Deployment Models
Infrastructure
Platform AS A SERVICE
Software

6. Infrastructure As A Service
• Setup your own cloud-service
• Datacenter on SOAP
• Basic costs:
– Connectivity
– CPU
– Storage
• Direct and On-Demand Provisioning
• Differentiated by smart network services

7. Platform As A Service
• Specific platform that is programmable.
• Infrastructure transparent
• On demand up and down scaling
• Provide a technology lock-in
• Reseller models for applications
• Samples: Google AppEngine, Salesforce.com, ZOHO

8. Software As A Service
• ASP application with cloud characteristics
• Integration standards are missing
• Possible lock-in
• Fast growing segment with startups:
– Photo/Video sites
– Consumer Financials
– Social

9. Factors
GRID
1. Cost reduction. Focus on Connectivity expenses.
operational
2. Flexibility. IT support should be up to web-speed.
3. High level SLA.
4. Usage based cost model.
Online
5. Easy upscaling. Costs
Apps
6. Less maintenance. Less visible technology. Green
7. Open standards. IT
8. Easy to control and maintain.
Outsourcing
Privacy
2.0
2.0

10. Type Of Clouds
• Public Clouds
– Everything for the end-user
• Private Clouds
– Plain Old Data Center Infrastructure (mostly NOT!)
– On-premise Cloud
– Off-premise Specialized Cloud
• Hybrid Clouds
– Surge computing (on demand capacity)

11. About the Economy Of Scale
Rules of the supermarket apply:
- Just-In-Time planning
- Demand based warehouse management
- Operational excellence
- Atiny optimization can already lead to profit
- Expensive in CAPEX, low in OPEX
Video of container based datacenter