1. Cloud Computing
begin presentation {

2. So what's cloud
computing?

4. So what's cloud computing?
I don't know :(
It's just a buzzword

5. So what's cloud computing?
Ok, I /*think I*/ know...

6. So what's cloud computing?
it's a form of computing in
which resources are
virtualised, abstracted and
dynamically allocated as
needed

7. I don't get it...

8. Ek vertaan nie!

9. English please!

10. So what's cloud computing?
Ok, 2 examples {

11. So what's cloud computing?
Example 00 {
It's like renting a house instead
of building one, it saves you
lots of money and decisions
(so I heard)

12. So what's cloud computing?
The house is not yours, you
can use it or rent a bigger
house if need be... but you
can't just break walls
} // end of example

13. So what's cloud computing?
So you have everything you
need in a traditional server
based computing environment
but you don't need to worry
about the data-center.

14. So what's cloud computing?
Example 01 {
You know when you use
Flickr, Gmail or Google Docs?

15. So what's cloud computing?
Do you know where Google or
Yahoo stores your files?

16. So what's cloud computing?
No!

17. So what's cloud computing?
But you know it's somewhere
on the internet...

18. So what's cloud computing?
That is cloud computing!
(you've been doing it all along)
} // end of example

19. So what exactly
does it do?

20. So what exactly does it do?
Resources are abstracted...

21. So what exactly does it do?
Network
Temporary Storage
Persistent Storage
Processing Power
File system
Operating System

22. Why is that
important?

23. Why is that important?
It simplifies things - let's you
focus on your task

24. Why is that important?
You don't need to build your
own data-center.
Don't worry about ventilation,
electricity, emergency plans...

25. Why is that important?
Your system administrator is
not to blame if things go wrong

26. Why is that important?
(Don't blame Eskom either)

27. Why is that important?
It's important because it saves
cost (at scale) and it allows...

28. Why is that important?
Elasticity // scale without hassles
Abstraction // Don't worry about OS
Virtualisation // Don't worry about hardware
Availability on demand
// pay only for what you use

29. Not all clouds are
created equal

30. {Some are puffier than others}

31. {
Reliability,
Performance,
Cost,
Availability,
Scalability
} = All differ between vendors.

32. Types of cloud
services

33. Types of cloud services
Infrastructure as a Service // Iaas
Platform as a Service // PaaS
Software as a Serive // Saas
Storage (Database) as a Service // [DS]aaS

34. Infrastructure as a Service (IaaS)
● Most of the time only the hardware is virtualised
● So you have a full system running on a virtual
machine
● You're still responsible for maintaining the
software
use_it_when {
you want a server but don't want
to deal with hardware failures
}

36. Platform as a Service (IaaS)
● Almost everything is virtualised (even files)
● You only have access to your app's sandbox
● Access to external services is done via the vendor's
API
use_it_when {
you want an application that
scales and it doesn't depend on
operating system APIs/utilities.
}

38. Software as a Service (SaaS)
● You don't install the app on the desktop
● You run the app inside a browser (how cool is that?)
use_it_when {
You do unto the browser what you
want done unto the desktop.
}

40. Database|Storage as a Service ([DS]aaS)
● You store files remotely
● Use a URL or the vendor's API to retrieve the files
use_it_when {
You want to store things remotely
or to access your files from
anywhere or you want to share
with the world.
}

42. Very good preso
on the subject
http://www.slideshare.
net/Guppers/im-cloud-
confused

43. // I think I'll stop here
} end presentation;

44. while (Questions) {
me.answer();
}

45. exit();