1. Traditional IT and Cloud

2. Overview
 Why study Cloud?
 Traditional IT
 Traditional IT vs. Cloud
 Cloud overview

3. Why study Cloud ?
 Companies of all sizes are moving their
operations on cloud.
 Cloud computing is changing the job market.
 Stay up-to-date with the latest technological
innovations.
 Your interest.

4. Traditional IT
 Before we look into the details of cloud, we first
need to understand how things work.
 Traditional IT is an informational technology
environment used for hosting data services or
applications that are owned, controlled and
managed by the same organization .
 This means that the organization needs to own
and maintain each of the components required for
application development.

5. Traditional IT
Application
Data
Runtime
Middleware
O/S
Virtualization
Servers
Storage
Networking
In traditional IT,
you
Manage all these

7. Features of traditional IT
 All the servers and infrastructure are within the
organization’s data center.
 It offers complete control of the resources.
 It needs staff to maintain the server.
 The hosting organization is responsible for the
security (physical and software).
 Infrastructure is not dynamically scalable as it
takes time to acquire physical servers and takes
time to set them up.

8. Features of traditional IT
 We need to have backup data centers for backup
(sensitive applications).
 The applications need to be designed based on
hardware limitations.
 The connectivity can be fast in case where data
centers are connected through LAN.
 As equipment is owned by the organization, in the
longer run in some cases, this could be more
economical.

9. Features of traditional IT
 The organization is responsible for all layers
which are application layer, OS, physical layer
and databases.
 An organization can have one or more data
centers depending on the need.

10. Traditional IT vs. Cloud
Traditional IT Cloud computing
Equipment/data centers owned by
the organization itself.
Equipment/data centers owned by
the cloud provider.
Upfront commitment to the
resources.
On demand resources acquisition.
Capacity addition takes time. Capacity addition is quick and easy.
Responsible for the security of the
infrastructure.
Cloud provider takes the burden of
security of the infrastructure.
May not be attractive models for
startups and for experimentation.
attractive models for startups and for
experimentation.
Workforce is familiar with this
approach.
Workforce needs training.
May be economical in few cases. Economical in lots of scenarios in
ever changing and fast moving IT
environment.
Works well when security and
confidentiality of the application is
Although the application and
confidentiality can be as solid as

11. Cloud overview
 Cloud  Not a physical thing.
 Cloud refers to network or Internet.
 Cloud is something which is present at remote
local and provides services over network.
 For some people, the word cloud refers to where
you store your pictures and share with others, for
others, it may refer to backing up your mobile
device.

13. Overview cloud
 Cloud is the logical name given to the resources
which are located at the remote place and
accessed by our network or Internet (it can be
accessed by multiples devices: mobile devices,
laptops, tablets…)
 Resources: storage, infrastructure, software and
managed services.
 A simple example for cloud service is Gmail which
is the email provided by Google and managed by
it.

14. Cloud overview
 Cloud computing: storing, accessing data and
programs over the internet instead of using
computer hard drives.
 The company offering these computing services
is called cloud provider and they typically charge
the same way we pay for electricity or water bill
which means we only pay for what we use.