1. Introduction to Cloud Computing
Giovanni Toraldo System
administrator
Introduction to Cloud Computing Giovanni Toraldo

2. Before the cloud
A server for each service:
Hardware requirements
Software requirements (OS)
Security requirements
Problems:
Hardware maintenance
Electric bills
Provisioning delays
Introduction to Cloud Computing Giovanni Toraldo

3. Cloud prerequisites
There are few underlying technologies
developed in the last years:
Virtualization
Distributed Storage
Web
Introduction to Cloud Computing Giovanni Toraldo

4. Virtualization
“The creation of a virtual
machine that acts like a real
computer with an operating
system. Software executed on
these virtual machines is
separated from the underlying
hardware resources.“ -
Wikipedia
Introduction to Cloud Computing Giovanni Toraldo

5. Distributed storage
“is any file system that allows access to
files stored on multiple hosts and
share them via a network.” -
Wikipedia
Introduction to Cloud Computing Giovanni Toraldo

6. Web
“communication between two parts
over the Web (Internet), typically
conveyed using HTTP, XML and other
Web-related standards.” - Wikipedia
Introduction to Cloud Computing Giovanni Toraldo

7. The Cloud
Introduction to Cloud Computing Giovanni Toraldo

8. Infrastructure as a service (IaaS)
Computational power
Storage space
Network connectivity
Introduction to Cloud Computing Giovanni Toraldo

9. Platform as a Service (PaaS)
Computing platform for web
applications
Introduction to Cloud Computing Giovanni Toraldo

10. Software as a Service (SaaS)
Access to a web application, completely
managed (backups, upgrades, etc)
Introduction to Cloud Computing Giovanni Toraldo

11. Cloud advantages
Pay-per-use, minimum investment
Availability, no worries about hardware
faults
Elasticity, scaling up and down in
seconds
Everything is manageable from a web
interface
Introduction to Cloud Computing Giovanni Toraldo

12. How to create our own cloud
“OpenNebula is the industry standard open-
source product for data center virtualization” -
http://www.opennebula.org
Introduction to Cloud Computing Giovanni Toraldo

13. OpenNebula Architecture
Introduction to Cloud Computing Giovanni Toraldo

14. Credits
http://www.flickr.com/photos/richard_jones/3245444875/
http://www.flickr.com/photos/joncrel/3238202791/
http://en.wikipedia.org/wiki/File:Cloud_computing.svg
http://www.flickr.com/photos/chrisdag/6073931293
http://www.flickr.com/photos/35762175@N05/3310686922
Introduction to Cloud Computing Giovanni Toraldo