2. 2
Cloud Computing
Content
Basic Concepts
Traditional Approach
First Movers in Cloud
Definition
Components of Cloud
Cloud’s Service Models
• Software as a Service
• Platform as a Service
• Infrastructure as a Service
Types of Cloud
Why Cloud Computing
Benefits of Cloud Computing
Applications of Cloud
References
5. Traditional Approach
Few years ago-
• The user used to back up their data on storage disks. With
few advancements in technology, smart & handy devices are
created to store data on the go.
• To set-up a business successfully, you needed to invest on
setting up devices, technical staff, software & licenses. As
your business grows you need additional investments not only
for keep your business running but also for persisting changes
in technology.
• You need upgrades, renewal of licenses, additional staff for
managing the excessive amount of data.
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Cloud Computing
First Movers in Cloud
Amazon
• Elastic Compute Cloud(EC2)
• Simple Storage Service(S3)
• Simple Queue Service(SQS)
Google
• App Engine
• Gmail
Microsoft
• Windows Azure
• Microsoft SQL Services
• Microsoft .NET Services
• Microsoft SharePoint Services
7. Definition
Cloud Computing can be defined as a technique which enables
the web hosting service providers to provide their customer an
efficient self-service approach.
It integrates various applications, platforms, infrastructures &
services which can be shared by several people or businesses at
the same time.
It is a blend of communication networks, business applications
& IT resources which is basically implemented to cut off costs
,optimization & synchronization of various resources.
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8. Components of Cloud [3]
Internet
Clients
Computers
Distributed
Servers
Datacenter
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9. 1. Clients
• Mobile- Mobile devices like PDAs, Smart-Phones.
• Thin- Devices not having internal hard drives.
• Thick- Regular computer accessing through web browsers.
2. Datacenter
• It is the collection of servers where the application we subscribe are
housed.
3. Distributed Servers
• Servers are placed at different geographical locations to ensure that
in case of a failure, the service can be accessed from some other site.
Grid Computing is often confused with Cloud Computing, but they
are quite different. In grid computing, a large project is divided
among multiple computers to make use of their resources. Cloud
computing just does opposite. It allows multiple smaller applications
to run at the same time.
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10. Cloud’s Service Models [1]
The services of a cloud includes the following traits:-
• Multitenancy
• Device Independency
• Large Scalability
• Low barriers to entry.
It includes the following three models of services:-
1. Software as a Service (SaaS)
2. Platform as a Service (PaaS)
3. Infrastructure as a Service (IaaS)
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11. Software as a Service (SaaS)
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In this model an application is hosted as a service to customer
who access it via the Internet. The idea is that you use the
software out of the box as is & do not need to make a lot of
changes or require integration to others systems, The provider
does all the patching & upgrades as well as keeping the
infrastructure running.
Internet
Application
Service
ProviderClients
12. Cloud Computing
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Platform as a Service (PaaS)
PaaS supplies all the resources required to build applications &
services completely from the internet, without having to download
or install software. It is also known as “Cloudware”. PaaS services
include:-
• Application Design
• Development
• Testing
• Deployment
• Hosting
• Database Integration
• Security
• Versioning
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Cloud Computing
Infrastructure as a Service (IaaS)
It offers the hardware so that your organization can put whatever
they want onto it. Rather than purchase servers, software, racks,
& having to pay for the datacenter space for them, the service
provider rents those resources.
IaaS allows you to “rent” such resources as:-
• Server Space
• Network equipment
• Memory
• CPU cycles
• Storage space
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Types of Cloud
The cloud computing services can be public or private. A public
cloud sells services to anyone on the internet. A private cloud is
a proprietary network. It is also a data center that provides
hosted services to a limited number of people. When public
cloud resources are used by a service provider to create their
private cloud, the result is called a virtual private cloud.
Private or public, the goal of cloud computing is to provide
easy admittance to computing resources and IT services.
Services can be anything from Web-based email to inventory
control, and database processing. Because the service provider
controls both the applications and the data, the user can use the
service from anywhere freely.
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Cloud Computing
Applications of Cloud
Cloud computing brings us applications, a way of viewing,
manipulating & sharing data.
The basic applications include :-
1. Storage
2. Database
3. Synchronization
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Cloud Computing
References
1. Cloud Computing (www.salesforce.com/cloudcomputing)
2. Cloud Computing by Tim & Michael at GoGrid.com
(http://www.youtube.com/watch?v=QJncFirhjPg)
3. Lewis, Grace. Basics About Cloud Computing.
(http://www.sei.cmu.edu/library/abstracts/whitepapers/clou
dcomputingbasics.cfm)
