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Single Computer
Mainframes with terminals
Client/Server Computing
Network Computing
Cloud Computing
1960
1970
1990
2000 2010
Co
mp
lexi
ty
TimeCentralized Distributed
Image source: http://infreemation.net/cloud-computing-linear-utility-or-complex-ecosystem
“Cloud Washing”
Yes, the Cloud is Real
We have agreements
on Terminology
Private Clouds are in
use
Multi-tenant cloud
providers are having success
Does it make economic
sense?
How will we handle
security and compliance?
How will we handle legal
matters?
Will there be a “big
switch”?
Once we’re in, how do
we get out? (portability)
How do we interoperate
with our existing “stuff”?
What happens when the Network fails?